©2020 F15 - YAMAHA OWNER'S MANUALS...F15 F20 LIT-18626-12-35 6AG-28199-3G-E0 6AG-9-3G-1E0.book 1...

Read this manual carefully before operating thisoutboard motor.

OWNER’S MANUAL

F15F20

LIT-18626-12-356AG-28199-3G-E0

6AG-9-3G-1E0.book 1 ページ２０１８年１１月８日　木曜日　午前９時３５分

©2020 Yamaha Motor Corporation

EMU25065

This productcan expose you to chemicalsincluding engine exhaust, whichis known to the State of Californiato cause cancer, and carbonmonoxide, which is known to theState of California to cause birthdefects or other reproductive harm.For more information go towww.P65Warnings.ca.gov.

WARNING:

Ce produit peut vous exposer à des produits chimiques y compris aux gaz d’échappement, qui sont considérés par l’état de Californie comme étant cancérigènes, et au monoxyde de carbone, qui est considéré par l’état de Californie comme un facteur de malformations congénitales ou d’autres troubles de la reproduction. Pour plus d’informations, rendez-vous sur www.P65Warnings.ca.gov.

ZMU08844

Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.



Important manual informationEMU44141

To the ownerThank you for selecting a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for proper operation, mainte-nance and care. A thorough understandingof these simple instructions will help you ob-tain maximum enjoyment from your newYamaha. If you have any question about theoperation or maintenance of your outboardmotor, please consult a Yamaha dealer.In this Owner’s Manual particularly importantinformation is distinguished in the followingways.

: This is the safety alert symbol. It isused to alert you to potential personal injuryhazards. Obey all safety messages that fol-low this symbol to avoid possible injury ordeath.

WARNINGEWM00782

A WARNING indicates a hazardous situa-tion which, if not avoided, could result indeath or serious injury.

NOTICEECM00702

A NOTICE indicates special precautionsthat must be taken to avoid damage to theoutboard motor or other property.

TIP:A TIP provides key information to make pro-cedures easier or clearer.

Yamaha continually seeks advancements inproduct design and quality. Therefore, whilethis manual contains the most current prod-uct information available at the time of print-ing, there may be minor discrepanciesbetween your machine and this manual. If

there is any question concerning this manu-al, please consult your Yamaha dealer.To ensure long product life, Yamaha recom-mends that you use the product and performthe specified periodic inspections and main-tenance by correctly following the instruc-tions in the owner’s manual. Any damageresulting from neglect of these instructions isnot covered by warranty.Some countries have laws or regulations re-stricting users from taking the product out ofthe country where it was purchased, and itmay be impossible to register the product inthe destination country. Additionally, the war-ranty may not apply in certain regions. Whenplanning to take the product to another coun-try, consult the dealer where the product waspurchased for further information.If you purchased this outboard motor used,see your Yamaha dealer to have it registeredin your name in Yamaha records.

TIP:The F15EHA, F15MHA, F15PHA, F20EA,F20EHA, F20MHA, F20PA, F20PHA and thestandard accessories are used as a base forthe explanations and illustrations in this man-ual. Therefore some items may not apply toevery model.EMU44152

F15, F20OWNER’S MANUAL

©2019 by Yamaha Motor Co., Ltd.1st Edition, November 2018

All rights reserved.Any reprinting or unauthorized usewithout the written permission of

Yamaha Motor Co., Ltd.is expressly prohibited.

Printed in Japan



Table of contentsSafety information............................. 1

Outboard motor safety ..................... 1Propeller .............................................. 1Rotating parts ...................................... 1Hot parts.............................................. 1Electric shock ...................................... 1Power tilt.............................................. 1Engine shut-off cord (lanyard) ............. 1Gasoline .............................................. 1Gasoline exposure and spills .............. 2Carbon monoxide ................................ 2Modifications ....................................... 2

Boating safety .................................. 2Alcohol and drugs................................ 2Personal flotation devices (PFDs) ....... 2People in the water.............................. 2Passengers ......................................... 2Overloading ......................................... 2Avoid collisions.................................... 3Collisions with floating or submerged

objects.............................................. 3Weather............................................... 3Accident reporting ............................... 4Boat education and training................. 4Passenger training .............................. 4Boating safety publications.................. 4Laws and regulations .......................... 4

Boating organizations.......................4Basic boating rules (Rules of the

road)..............................................5Steering and sailing rules and sound

signals.............................................. 5Rules when encountering vessels....... 6Other special situations ....................... 7

General information ........................ 10Identification numbers record......... 10

Outboard motor serial number .......... 10Key number ....................................... 10

Compliance mark label................... 10Read manuals and labels...............12

Warning labels .................................. 12

Specifications and requirements ................................... 15

Specifications................................. 15Installation requirements................ 16

Boat horsepower rating ..................... 16Mounting outboard motor .................. 16

Remote control requirements......... 17Battery requirements...................... 17

Specifications of Battery.................... 17To install the battery .......................... 17

Propeller selection ......................... 18Start-in-gear protection .................. 18Engine oil requirements ................. 18Fuel requirements .......................... 19

Gasoline ............................................ 19Gasoline Additives............................. 20

Muddy or acidic water .................... 21Anti-fouling paint ............................ 21Outboard motor disposal

requirements............................... 21Emergency equipment ................... 21Emission control information ......... 22

Star labels ......................................... 22

Components .................................... 24Components diagram..................... 24

Fuel tank............................................ 25Fuel joint ............................................ 26Fuel gauge ........................................ 26Pressure relief tab ............................. 26Fuel tank cap..................................... 26Air vent screw.................................... 26Remote control box ........................... 26Remote control lever ......................... 26Neutral interlock trigger ..................... 27Neutral throttle lever .......................... 27Tiller handle ...................................... 27Gear shift lever ................................. 27Throttle grip ...................................... 28Throttle indicator ............................... 28Throttle friction adjuster ..................... 28Engine shut-off cord (lanyard) and

clip.................................................. 29



Table of contentsEngine stop button ........................... 29Manual starter handle........................ 30Starter button..................................... 30Main switch........................................ 30Power tilt switch................................. 30Steering friction adjuster.................... 31Trim tab ............................................. 32Trim rod (tilt pin) ................................ 32Tilt lock mechanism........................... 32Tilt support knob................................ 33Tilt support bar .................................. 33Power tilt unit..................................... 33Cowling lock lever ............................. 34Flushing device ................................. 34Alert indicator ................................... 34

Instruments and indicators ............ 35Indicators .......................................35

Low oil pressure-alert indicator ......... 35Overheat-alert indicator..................... 35

Engine control system.................... 36Alert system ................................... 36

Overheat alert.................................... 36Low oil pressure alert ........................ 36

Installation .......................................38Installation ...................................... 38

Mounting the outboard motor ............ 38Clamping the outboard motor............ 40

Operation ......................................... 41First-time operation ........................ 41

Fill engine oil ..................................... 41Breaking in engine............................. 41Getting to know your boat ................. 41

Checks before starting engine .......41Fuel level ........................................... 42Remove the top cowling .................... 42Fuel system....................................... 42Controls ............................................. 42Engine shut-off cord (lanyard) ........... 43Engine oil........................................... 43Engine ............................................... 43

Flushing device ................................. 44Install top cowling .............................. 44Checking power tilt system................ 44Battery ............................................... 45

Filling fuel....................................... 45Operating engine ........................... 47

Sending fuel (portable tank) .............. 47Starting engine .................................. 49

Checks after starting engine .......... 53Cooling water .................................... 53

Warming up engine........................ 54Manual start and electric start

models ........................................... 54Checks after engine warm up ........ 54

Shifting .............................................. 54Stop switches .................................... 54

Shifting ........................................... 54Stopping boat................................. 56Stopping engine............................. 56

Procedure.......................................... 56Trimming outboard motor............... 57

Adjusting trim angle for manual tilt models ........................................... 58

Adjusting trim angle (power tilt models) .......................................... 58

Adjusting boat trim............................. 59Tilting up and down........................ 60

Procedure for tilting up (manual tilt models) .......................................... 60

Procedure for tilting up (power tilt models) .......................................... 61

Procedure for tilting down (manual tilt models)...................................... 62

Procedure for tilting down (power tilt models)...................................... 63

Shallow water ................................ 63Cruising in shallow water (manual

tilt models)...................................... 63Power tilt models ............................... 65

Cruising in other conditions............ 66



Table of contentsMaintenance..................................... 67

Transporting and storing outboard motor ........................................... 67Dismounting the outboard motor ....... 67Storing outboard motor...................... 68Conditioning and stabilizing

gasoline.......................................... 69Procedure.......................................... 69Lubrication......................................... 70Cleaning and anticorrosion

measures ....................................... 70Flushing power unit ........................... 71Cleaning the outboard motor............. 71Checking painted surface of

outboard motor............................... 72Periodic maintenance.....................72

Replacement parts ............................ 72Maintenance interval guidelines ........ 72Maintenance chart 1.......................... 74Maintenance chart 2.......................... 76Greasing............................................ 77Cleaning and adjusting spark plug .... 78Checking fuel filter............................. 79Inspecting idle speed......................... 79Changing engine oil........................... 80Replacing the engine oil filter ............ 82Why Yamalube .................................. 83Inspecting wiring and connectors ...... 83Checking propeller ............................ 83Removing propeller ........................... 84Installing propeller ............................. 84Changing gear oil .............................. 85Inspecting and replacing anode(s) .... 86Checking battery (for electric start

models) .......................................... 87Connecting the battery ...................... 88Disconnecting the battery.................. 88

Trouble Recovery............................89Troubleshooting ............................. 89Temporary action in emergency.....92

Impact damage.................................. 92Replacing fuse................................... 92Power tilt will not operate .................. 93

Starter will not operate ...................... 93Emergency starting engine (manual

starter model) ................................. 94Emergency starting engine (electric

start model) .................................... 95Treatment of submerged motor ..... 97

Consumer information ................... 98YAMAHA FOUR-STROKE

OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ............................... 98

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE U.S.A. OR CANADA......... 100

INDEX............................................. 101



1

Safety informationEMU33623

Outboard motor safetyObserve these precautions at all times.EMU36502

PropellerPeople can be injured or killed if they comein contact with the propeller. The propellercan keep moving even when the motor is inneutral, and sharp edges of the propeller cancut even when stationary. Stop the engine when a person is in the

water near you. Keep people out of reach of the propeller,

even when the engine is off.EMU40272

Rotating partsHands, feet, hair, jewelry, clothing, personalflotation device (PFD) straps, etc., can be-come entangled with internal rotating parts ofthe engine, resulting in serious injury ordeath.Keep the top cowling in place whenever pos-sible. Do not remove or replace the top cowl-ing with the engine running.Only operate the engine with the top cowlingremoved according to the specific instruc-tions in the manual. Keep hands, feet, hair,jewelry, clothing, PFD straps, etc., awayfrom any exposed moving parts.EMU33641

Hot partsDuring and after operation, engine parts arehot enough to cause burns. Avoid touchingany parts under the top cowling until the en-gine has cooled.EMU33651

Electric shockDo not touch any electrical parts while start-ing or operating the engine. They can causeshock or electrocution.

EMU34791

Power tiltBody parts can be crushed between the mo-tor and the clamp bracket when the motor istrimmed or tilted. Keep body parts out of thisarea at all times. Be sure no one is in thisarea before operating the power tilt mecha-nism.The power tilt switches operate even whenthe main switch is off. Keep people be awayfrom the switches whenever working aroundthe motor.Never get under the lower unit while it is tilt-ed, even when the tilt support lever or knobis locked. Severe injury could occur if theoutboard motor accidentally falls.EMU33672

Engine shut-off cord (lanyard)Attach the engine shut-off cord so that theengine stops if the operator falls overboardor leaves the helm. This prevents the boatfrom running away under power and leavingpeople stranded, or running over people orobjects.Always attach the engine shut-off cord to asecure place on your clothing or your arm orleg while operating. Do not remove it to leavethe helm while the boat is moving. Do not at-tach the cord to clothing that could tearloose, or route the cord where it could be-come entangled, preventing it from function-ing.Do not route the cord where it is likely to beaccidentally pulled out. If the cord is pulledduring operation, the engine will shut off andyou will lose most steering control. The boatcould slow rapidly, throwing people and ob-jects forward.EMU33811

GasolineGasoline and its vapors are highly flam-mable and explosive. Always, refuel ac-



Safety information

2

cording to the procedure on page 47 toreduce the risk of fire and explosion.EMU33821

Gasoline exposure and spillsTake care not to spill gasoline. If gasolinespills, wipe it up immediately with dry rags.Dispose of rags properly.If any gasoline spills onto your skin, immedi-ately wash with soap and water. Changeclothing if gasoline spills on it.If you swallow gasoline, inhale a lot of gaso-line vapor, or get gasoline in your eyes, getimmediate medical attention. Never siphonfuel by mouth.EMU33901

Carbon monoxideThis product emits exhaust gases which con-tain carbon monoxide, a colorless, odorlessgas which may cause brain damage or deathwhen inhaled. Symptoms include nausea,dizziness, and drowsiness. Keep cockpit andcabin areas well ventilated. Avoid blockingexhaust outlets.EMU33781

ModificationsDo not attempt to modify this outboard mo-tor. Modifications to your outboard motormay reduce safety and reliability, and renderthe outboard unsafe or illegal to use.EMU33742

Boating safetyThis section includes a few of the many im-portant safety precautions that you shouldfollow when boating.EMU33711

Alcohol and drugsNever operate after drinking alcohol or takingdrugs. Intoxication is one of the most com-mon factors contributing to boating fatalities.EMU40281

Personal flotation devices (PFDs)Have an approved PFD on board for every

occupant. Yamaha recommends that youmust wear a PFD whenever boating. At aminimum, children and non-swimmersshould always wear PFDs, and everyoneshould wear PFDs when there are potentiallyhazardous boating conditions.EMU33732

People in the waterAlways watch carefully for people in the wa-ter, such as swimmers, skiers, or divers,whenever the engine is running. Whensomeone is in the water near the boat, shiftinto neutral and stop the engine.Stay away from swimming areas. Swimmerscan be hard to see.The propeller can keep moving even whenthe motor is in neutral. Stop the engine whena person is in the water near you.EMU33752

PassengersConsult your boat manufacturer’s instruc-tions for details about appropriate passengerlocations in your boat and be sure all pas-sengers are positioned properly before ac-celerating and when operating above an idlespeed. Standing or sitting in non-designatedlocations may result in being thrown eitheroverboard or within the boat due to waves,wakes, or sudden changes in speed or direc-tion. Even when people are positioned prop-erly, alert your passengers if you must makeany unusual maneuver. Always avoid jump-ing waves or wakes.EMU33763

OverloadingDo not overload the boat. Consult the boatcapacity plate or boat manufacturer for max-imum weight and number of passengers. Besure that weight is properly distributed ac-cording to the boat manufacturer’s instruc-tions. Overloading or incorrect weightdistribution can compromise the boat’s han-



Safety information

3

dling and lead to an accident, capsizing orswamping.EMU33773

Avoid collisionsScan constantly for people, objects, and oth-er boats. Be alert for conditions that limit yourvisibility or block your vision of others.

Operate defensively at safe speeds andkeep a safe distance away from people, ob-jects, and other boats. Do not follow directly behind other boats or

waterskiers. Avoid sharp turns or other maneuvers that

make it hard for others to avoid you or un-derstand where you are going.

Avoid areas with submerged objects orshallow water.

Ride within your limits and avoid aggres-sive maneuvers to reduce the risk of lossof control, ejection, and collision.

Take early action to avoid collisions. Re-member, boats do not have brakes, andstopping the engine or reducing throttlecan reduce the ability to steer. If you arenot sure that you can stop in time beforehitting an obstacle, apply throttle and turnin another direction.

EMU48100

Collisions with floating or submerged objectsIf the outboard motor hits a floating object or

an obstacle in the water while cruising, thefollowing could occur: The passengers and any loose equipment

or luggage could be thrown forward due tothe sudden deceleration.

Parts of the outboard motor could comeloose as a result of the impact and couldbe thrown into the boat.

The boat or outboard motor could be dam-aged as a result of the impact.

When you operate the boat in an area wherethere might be floating objects or obstaclesin the water, be sure to adjust the trim angleof the outboard motor, slow down, and oper-ate carefully. For further information, seepage 63.If the outboard motor hits a floating object oran obstacle in the water, make sure thatthere are no abnormalities with the boat andthe outboard motor. If anything abnormal isfound, return to the nearest harbor at lowspeed and have a Yamaha dealer inspectthe outboard motor.

EMU33791

WeatherStay informed about the weather. Check

ZMU06025



Safety information

4

weather forecasts before boating. Avoidboating in hazardous weather.EMU44161

Accident reportingBoat operators are required by law to file aBoating Accident Report with their boatinglaw enforcement agency if their boat is in-volved in any of the following accidents:1. There is loss of life or probable loss of

life.2. There is personal injury that requires

medical attention beyond first aid.3. There is property damage to boats or

other property over a certain amount.4. There is complete loss of a boat.Contact local law enforcement personnel if areport is necessary.EMU44172

Boat education and trainingFor U.S.A.Operators should take a boating safetycourse. This may be required in your state.Many of the organizations listed in the nextsection can provide information about cours-es in your area.You may also want to consider an Internet-based program for basic boater education.The Online Boating Safety Course providedby the BoatU.S. Foundation, is approved bythe National Association of State BoatingLaw Administrators (NASBLA) and recog-nized by the United States Coast Guard.Most, but not all, states accept this course tomeet their minimum requirements. While itcannot replace an in-depth course such asone offered by the U.S. Coast Guard, U.S.Power Squadron, or other organization, thisonline course does provide a general over-view of the basics in boating safety, require-ments, navigation, and operation. Uponsuccessful completion of the course, theuser can download a certificate of comple-

tion immediately or, for a small charge, re-quest one by mail. To take this free course,go to boatus.org.For CanadaAll operators of pleasure craft must illustratecompetency by means of a Pleasure CraftOperators Card with the exception of Per-sonal Water Craft used for rental purposeswhich require a rental checklist be complet-ed. Pleasure Craft Operators Cards can beobtained following the completion of a com-petency course, with an online option. De-tails can be found on Transport Canada’swebsite. www.tc.gc.caEMU33881

Passenger trainingMake sure at least one other passenger istrained to operate the boat in the event of anemergency.EMU33891

Boating safety publicationsBe informed about boating safety. Additionalpublications and information can be obtainedfrom many boating organizations.EMU33592

Laws and regulationsKnow the marine laws and regulations whereyou will be boating—and obey them. Severalsets of rules prevail according to geographiclocation, but all are basically the same as theInternational Rules of the Road. The rulespresented in the following section are con-densed—and have been provided for yourconvenience only.Contact the U.S. Coast Guard, the NationalAssociation of State Boating Law Adminis-trators, or your local Power Squadron for acomplete set of rules governing the waters inwhich you will be using your boat.EMU44182

Boating organizationsThe following organizations provide boating



Safety information

5

safety training and information about boatingsafety and laws.

In the U.S.A.United States Coast GuardConsumer Affairs Staff (G-BC)Office of Boating, Public, and Consumer Af-fairsU.S. Coast Guard HeadquartersWashington, D.C. 20593-0001http://www.uscgboating.org/

United States Power Squadrons1-888-FOR-USPS (1-888-367-8777)http://www.usps.org/

Boat Owners Association of The UnitedStates1-800-336-BOAT (1-800-336-2628)http://www.boatus.com/

National Association of State BoatingLaw Administrators (NASBLA)1500 Leestown Road, Suite 330Lexington, KY 40511 859-225-9497http://www.nasbla.org/

National Marine Manufacturers Associa-tion (NMMA)200 East Randolph DriveSuite 5100Chicago, IL 60601http://www.nmma.org/

Marine Retailers Association of America155 N. Michigan Ave. Chicago,IL 60304http://www.mraa.com/

In CanadaNational Marine Manufacturers Associa-tion Canada14 McEwan DriveSuite 8Bolton, ONL7E 1H1http://www.nmma.org/

EMU33692

Basic boating rules (Rules of the road)

Just as there are rules that apply when youare driving on streets and highways, thereare waterway rules that apply when you aredriving your boat. These rules are used inter-nationally. (For U.S.A.: and are also en-forced by the United States Coast Guard andlocal agencies.) You should be aware ofthese rules, and follow them whenever youencounter another vessel on the water.EMU33702

Steering and sailing rules and sound signalsWhenever two vessels on the water meetone another, one vessel has the right-of-way; it is called the “stand-on” vessel. Thevessel that does not have the right-of-way iscalled the “give-way” or “burdened” vessel.These rules determine which vessel has theright-of-way, and what each vessel shoulddo.

Stand-on vesselThe vessel with the right-of-way has the dutyto continue its course and speed, except toavoid an immediate collision. When youmaintain your direction and speed, the othervessel will be able to determine how best toavoid you.



Safety information

6

Give-way vesselThe vessel that does not have the right-of-way has the duty to take positive and timelyaction to stay out of the way of the Stand-Onvessel. Normally, you should not cross infront of the vessel with the right-of-way. Youshould slow down or change directions brief-ly and pass behind the other vessel. Youshould always move in such a way that theoperator of the other vessel can see whatyou are doing.“The general prudential rule”This rule is called Rule 2 in the InternationalRules and says,“In obeying and construing these rules dueregard shall be had to all dangers of naviga-tion and collision, and to any special circum-stances, which may render a departure fromthe above rules necessary in order to avoidimmediate danger.”In other words, follow the standard rules ex-cept when a collision will occur unless bothvessels try to avoid each other. If that is thecase, both vessels become “Give-Way” ves-sels.EMU25524

Rules when encountering vesselsThere are three main situations that you mayencounter with other vessels which couldlead to a collision unless the Steering Rulesare followed:Meeting: (you are approaching another ves-sel head-on)Crossing: (you are traveling across the oth-er vessel’s path)Overtaking: (you are passing or beingpassed by another vessel)In the following illustration, your boat is in thecenter. You should give the right-of-way toany vessels shown in white area (you are theGive-Way vessel). Any vessels in the shad-ed area must yield to you (they are the Give-

Way vessels). Both you and the meetingvessel must alter course to avoid each other.

MeetingIf you are meeting another power vesselhead-on, and are close enough to run therisk of collision, neither of you has the right-of-way. Both of you should alter course toavoid an accident. You should keep the othervessel on your port (left) side. This ruledoesn’t apply if both of you will clear one an-other if you continue on your set course andspeed.

CrossingWhen two power driven vessels are crossingeach other’s path close enough to run therisk of collision, the vessel which has the oth-er on the starboard (right) side must keep outof the way of the other. If the other vessel ison your right, you must keep out of its way;you are the Give-Way vessel. If the othervessel is on your port (left) side, remember



Safety information

7

that you should maintain course and direc-tion, provided the other vessel gives you theright-of-way as it should.

OvertakingIf you are passing another vessel, you arethe “Give-Way” vessel. This means that theother vessel is expected to maintain itscourse and speed. You must stay out of itsway until you are clear of it. Likewise, if an-other vessel is passing you, you shouldmaintain your speed and direction so that theother vessel can steer itself around you.EMU25532

Other special situationsThere are three other rules you should beaware of when driving your boat around oth-er vessels.Narrow channels and bendsWhen navigating in narrow channels, youshould keep to the right when it is safe andpractical to do so. If the operator of a power-driven vessel is preparing to go around abend that may obstruct the view of other wa-ter vessels, the operator should sound a pro-longed blast on the whistle (4 to 6 seconds).If another vessel is around the bend, it tooshould sound the whistle. Even if no reply isheard, however, the vessel should still pro-ceed around the bend with caution. If younavigate such waters with your boat, you willneed to carry a portable air horn, available

from local marine supply stores.Fishing vessel right-of-wayAll vessels that are fishing with nets, lines ortrawls are considered to be “fishing vessels”under the International Rules. Vessels withtrolling lines are not considered fishing ves-sels. Fishing vessels have the right-of-wayregardless of position. Fishing vessels can-not, however, impede the passage of othervessels in narrow channels.Sailing vessel right-of-waySailing vessels should normally be given theright-of-way. The exceptions to this are:1. When the sailing vessel is overtaking the

power-driven vessel, the power-drivenvessel has the right-of-way.

2. Sailing vessels should keep clear of anyfishing vessel.

3. In a narrow channel, a sailing vesselshould not hamper the safe passage ofa power-driven vessel that can navigateonly in such a channel.

Reading buoys and other markersThe waters of the United States are markedfor safe navigation by the lateral system ofbuoyage. Simply put, buoys and markershave an arrangement of shapes, colors,numbers and lights to show which side of thebuoy a boater should pass on when navigat-ing in a particular direction. The markings onthese buoys are oriented from the perspec-tive of being entered from seaward (the boat-er is going towards the port). This means thatred buoys are passed on the starboard(right) side when proceeding from open wa-ter into port, and black buoys are to port (left)side. When navigating out of port, your posi-tion with respect to the buoys should be re-versed; red buoys should be to port andblack buoys to starboard.Many bodies of water used by boaters are



Safety information

8

entirely within the boundaries of a particularstate. The Uniform State Waterway MarkingSystem has been devised for these waters.This system uses buoys and signs with dis-tinctive shapes and colors to show regulatoryor advisory information. These markers arewhite with black letters and orange boarders.They signify speed zones, restricted areas,danger areas, and general information.Remember, markings may vary by geo-graphic location. Always consult local boat-ing authorities before driving your boat inunfamiliar waters.



Safety information

9

ZMU01708



10

General informationEMU25172

Identification numbers recordEMU25186

Outboard motor serial numberThe outboard motor serial number isstamped on the label attached to the portside of the clamp bracket.Record your outboard motor serial number inthe spaces provided to assist you in orderingspare parts from your Yamaha dealer or forreference in case your outboard motor is sto-len.

EMU25192

Key numberIf a main key switch is equipped with the mo-tor, the key identification number is stampedon your key as shown in the illustration. Re-cord this number in the space provided forreference in case you need a new key.

EMU46133

Compliance mark labelEngines affixed with this label conform to theregulations for each country.

1. Outboard motor serial number location

1. Outboard motor serial number location

1

ZMU05335

1

ZMU05336

1. Serial number2. Model name3. Motor transom height4. Approved model code

1. Key number

34 12

ZMU01692

1

ZMU01694



General information

11

This label is affixed to the clamp bracket orswivel bracket.

Regulatory Compliance Mark (RCM)Engines affixed with this mark conform tocertain portion(s) of the Australian RadioCommunications Act.

ICES-002 Compliance LabelEngines affixed with this mark meet all re-quirements of the Canadian InterferenceCausing Equipment Regulations.

1. Compliance mark label location

1. Regulatory Compliance Mark (RCM)

ZMU055901

ZMU081901

1. ICES-002 Compliance Label

ZMU08191

1



General information

12

EMU33524

Read manuals and labelsBefore operating or working on this outboard motor: Read this manual. Read any manuals supplied with the boat. Read all labels on the outboard motor and the boat.If you need any additional information, contact your Yamaha dealer.EMU33836

Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements.

ZMU07439

1 2

3



General information

13

EMU33913

Contents of labelsThe above warning labels mean as follows.1

WARNINGEWM01692

Emergency starting does not have start-in-gear protection. Ensure shift control isin neutral before starting engine.

2

WARNINGEWM01682

Keep hands, hair, and clothing awayfrom rotating parts while the engine isrunning.

Do not touch or remove electrical partswhen starting or during operation.

3

WARNINGEWM01672

Read Owner’s Manuals and labels. Wear an approved personal flotation

device (PFD). Attach engine shut-off cord (lanyard) to

your PFD, arm, or leg so the enginestops if you accidentally leave thehelm, which could prevent a runawayboat.

6EE-G2794-40

6EE-H1994-406EE-H1995-40

1 2

3

6EE-G2794-50

6EE-H1994-506EE-H1995-50

ZMU05740



General information

14

EMU35133

SymbolsThe following symbols mean as follows.

Notice/Warning

Read Owner’s Manual

Hazard caused by continuous rotation

Electrical hazard

ZMU05696

ZMU05664

ZMU05665

ZMU05666



15

Specifications and requirementsEMU38092

SpecificationsTIP:“(AL)” stated in the specification data belowrepresents the numerical value for the alumi-num propeller installed.EMU2821Z

Dimension and weight:Overall length:

1048 mm (41.3 in) (F15EHA, F15MHA, F15PHA, F20EHA, F20MHA, F20PHA)665 mm (26.2 in) (F20EA, F20PA)

Overall width:390 mm (15.4 in) (F20EA, F20PA)420 mm (16.5 in) (F15EHA, F15MHA, F15PHA, F20EHA, F20MHA, F20PHA)

Overall height S:1078 mm (42.4 in) (F15EHA, F15MHA, F20EA, F20EHA, F20MHA, F20PA)

Overall height L:1205 mm (47.4 in)

Motor transom height S:438 mm (17.2 in) (F15EHA, F15MHA, F20EA, F20EHA, F20MHA)443 mm (17.4 in) (F20PA)

Motor transom height L:565 mm (22.2 in) (F15EHA, F15MHA, F20EA, F20EHA, F20MHA)570 mm (22.4 in) (F15PHA, F20PA, F20PHA)

Dry weight (AL) S:51 kg (112 lb) (F15MHA, F20MHA)52 kg (115 lb) (F20EA)54 kg (119 lb) (F15EHA, F20EHA)57 kg (126 lb) (F20PA)

Dry weight (AL) L:53 kg (117 lb) (F15MHA, F20MHA)

54 kg (119 lb) (F20EA)56 kg (123 lb) (F15EHA, F20EHA)59 kg (130 lb) (F20PA)61 kg (134 lb) (F15PHA, F20PHA)

Performance:Full throttle operating range:

5000–6000 r/minRated power:

11.0 kW (15 HP) (F15EHA, F15MHA, F15PHA)14.7 kW (20 HP) (F20EA, F20EHA, F20MHA, F20PA, F20PHA)

Idle speed (in neutral):1000–1100 r/min

Power unit:Type:

4-stroke SOHC L2 4 valvesTotal displacement:

362 cm3 (22.1 c.i.)Bore stroke:

63.0 58.1 mm (2.48 2.29 in)Ignition system:

CDISpark plug (NGK):

DPR6EB-9Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)Steering system:

Remote steering (F20EA, F20PA)Tiller handle (F15EHA, F15MHA, F15PHA, F20EHA, F20MHA, F20PHA)

Starting system:Electric starter (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)Manual starter (F15MHA, F20MHA)

Starting carburetion system:Prime start

Valve clearance IN (cold engine):0.15–0.25 mm (0.0059–0.0098 in)



Specifications and requirements

16

Valve clearance EX (cold engine):0.25–0.35 mm (0.0098–0.0138 in)

Battery rating (CCA/SAE):245–433 A (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)

Battery rating (MCA/ABYC):323–520 A (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)

Battery rating (RC/SAE):52 minutes (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)

Maximum generator output:10 A (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)

Lower unit:Gear shift positions:

Forward-neutral-reverseGear ratio:

2.08 (27/13)Trim and tilt system:

Manual tilt (F15EHA, F15MHA, F20EA, F20EHA, F20MHA)Power tilt (F15PHA, F20PA, F20PHA)

Propeller mark:J/J1 (F15EHA, F15MHA, F15PHA)J1 (F20EA, F20EHA, F20MHA, F20PA, F20PHA)

Fuel and oil:Recommended fuel:

Regular unleaded gasolineMin. pump octane number (PON):

86Fuel tank capacity:

25 L (6.61 US gal, 5.50 Imp.gal)Recommended engine oil:

YAMALUBE 4M FC-W or 4-stroke outboard motor oil

Recommended engine oil grade 1:SAE 10W-30/10W-40/5W-30 API SE/SF/SG/SH/SJ/SL

Engine oil quantity (without oil filter re-placement):

1.6 L (1.69 US qt, 1.41 Imp.qt)Engine oil quantity (with oil filter replace-ment):

1.8 L (1.90 US qt, 1.58 Imp.qt)Lubrication system:

Wet sumpRecommended gear oil:

Yamalube Marine Gearcase Lube or Hypoid gear oil

Recommended gear oil grade:SAE 90 API GL-4

Gear oil quantity:0.250 L (0.264 US qt, 0.220 Imp.qt)

EMU33556

Installation requirementsEMU33566

Boat horsepower rating

WARNINGEWM01561

Overpowering a boat can cause severeinstability.

Before installing the outboard motor(s), con-firm that the total horsepower of your out-board motor(s) does not exceed the boat’smaximum horsepower rating. See the boat’scapacity plate or contact the manufacturer.EMU40491

Mounting outboard motor

WARNINGEWM02501

Improper mounting of the outboard mo-tor could result in hazardous condi-tions such as poor handling, loss ofcontrol, or fire hazards.

Because the outboard motor is very




17

heavy, special equipment and trainingis required to mount it safely.

Your dealer or other person experienced inproper rigging should mount the outboardmotor using correct equipment and completerigging instructions. For further information,see page 38.EMU33582

Remote control requirements

WARNINGEWM01581

If the engine starts in gear, the boat canmove suddenly and unexpectedly, pos-sibly causing a collision or throwingpassengers overboard.

If the engine ever starts in gear, thestart-in-gear protection device is notworking correctly and you should dis-continue using the outboard. Contactyour Yamaha dealer.

The remote control unit must be equippedwith a start-in-gear protection device(s). Thisdevice prevents the engine from starting un-less it is in neutral.EMU25695

Battery requirementsEMU25717

Specifications of BatteryUse a fully charged battery that meets thefollowing specifications. The engine cannotbe started if battery voltage is too low.

NOTICEECM01064

Do not use a battery that does not meetthe specified capacity. If a battery thatdoes not meet specifications is used,the electric system could perform poor-ly or be overloaded, causing electricsystem damage.

Do not use a battery which exceeds themaximum CCA rating. If the batteriesare used in parallel circuit, use new bat-teries of the same type and make surethat the total battery rating never ex-ceeds the maximum CCA rating.

EMU36293

Mounting batteryMount the battery holder securely in a dry,well-ventilated, vibration-free location in theboat. WARNING! Do not put flammableitems, or loose heavy or metal objects inthe same compartment as the battery.Fire, explosion or sparks could result.[EWM01821]

Battery cableThe battery cable size and length are critical.Consult your Yamaha dealer about the bat-tery cable size and length.EMU44771

To install the battery

NOTICEECM01091

A battery cannot be connected to modelsthat do not have a rectifier or RectifierRegulator.

If you wish to use a battery, your outboardmotor must be equipped with the followingparts. Rectifier or Rectifier Regulator Lighting coilIf you do not know if your outboard motor is

Battery rating (CCA/SAE):245–433 A (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)

Battery rating (MCA/ABYC):323–520 A (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)

Battery rating (RC/SAE):52 minutes (F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA)




18

equipped with these parts, consult yourYamaha dealer.Install an optional Rectifier Regulator or useaccessories rated to withstand 18 volts orhigher with the above models. Consult yourYamaha dealer for details on installing anoptional Rectifier Regulator.EMU34196

Propeller selectionNext to selecting an outboard motor, select-ing the right propeller is one of the most im-portant purchasing decisions a boater canmake. The type, size, and design of your pro-peller have a direct impact on acceleration,top speed, fuel economy, and even enginelife. Yamaha designs and manufactures pro-pellers for every Yamaha outboard motorand every application.Your outboard motor came with a Yamahapropeller selected to perform well over arange of applications, but there may be useswhere a different propeller would be moreappropriate.Your Yamaha dealer can help you select theright propeller for your boating needs. Selecta propeller that will allow the engine to reachthe middle or upper half of the operatingrange at full throttle with the maximum boat-load. Generally, select a larger pitch propel-ler for a smaller operating load and a smallerpitch propeller for a heavier load. If you carryloads that vary widely, select the propellerthat lets the engine run in the proper rangefor your maximum load but remember thatyou may need to reduce your throttle settingto stay within the recommended enginespeed range when carrying lighter loads.To check the propeller, see page 83.

EMU25771

Start-in-gear protectionYamaha outboard motors or Yamaha-ap-proved remote control units are equippedwith start-in-gear protection device(s). Thisfeature permits the engine to be started onlywhen it is in neutral. Always select neutralbefore starting the engine.EMU41953

Engine oil requirementsSelect an oil grade according to the averagetemperatures in the area where the outboardmotor will be used.

1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)

Recommended engine oil:YAMALUBE 4M FC-W or 4-stroke out-board motor oil

Recommended engine oil grade 1:SAE 10W-30/10W-40/5W-30 API SE/SF/SG/SH/SJ/SL

Recommended engine oil grade 2:SAE 15W-40/20W-40/20W-50 API SH/SJ/SL

Engine oil quantity (without oil filter replacement):

1.6 L (1.69 US qt, 1.41 Imp.qt)Engine oil quantity (with oil filter re-placement):

1.8 L (1.90 US qt, 1.58 Imp.qt)

ZMU04605

-x1 2 3




19

If oil grades listed under Recommended en-gine oil grade 1 are not available, select analternative oil grade listed under Recom-mended engine oil grade 2.Recommended engine oil grade 1

Recommended engine oil grade 2

EMU36361

Fuel requirementsEMU41333

GasolineUse a good quality gasoline that meets theminimum octane requirement. If knocking orpinging occurs, use a different brand of gas-oline or premium unleaded fuel. Yamaharecommends that you use alcohol-free gaso-line (see Gasoline with Ethanol) wheneverpossible.The use of a poor quality gasoline may resultin starting and running problems. If you en-counter drivability problems, which you sus-pect could be related to the fuel you areusing, Yamaha recommends that you switch

to a recognized high quality brand of gaso-line, such as a gasoline that is advertised asTop Tier Detergent Gasoline. NOTICE: Fail-ure to comply with these recommenda-tions may also result in unscheduledmaintenance, fuel system damage, andinternal engine damage. [ECM04480]

NOTICEECM01982

Do not use leaded gasoline. Leadedgasoline can seriously damage the en-gine.

Avoid getting water and contaminantsin the fuel tank. Contaminated fuel cancause poor performance or enginedamage. Use only fresh gasoline thathas been stored in clean containers.

Gasoline with EthanolTwo types of gasoline are commonly avail-able in the U.S.A. and Canada for use in au-tomobiles and boats: conventional gasolinewithout Ethanol and gasoline with Ethanol,which is typically referred to as E10 gasoline.According to federal regulations, E10 gaso-line may contain up to 10% Ethanol.A high quality gasoline without Ethanol is thepreferred fuel for your Yamaha outboard mo-tor. However, if gasoline with Ethanol is theonly fuel available in your area, your Yamahaoutboard motor is calibrated to run properlyon fresh E10 gasoline that meets the mini-mum octane requirement specified for thismodel.

NOTICEECM02402

Never use a gasoline for your outboard

ZMU06854

122˚F

50˚C

104

40

86

30

68

SAE API

SESFSGSHSJSL

20

50

10

32

0

14

-10

-4

-20

10W–30

10W–40

5W–30

ZMU06855

122˚F

50˚C

104

40

86

30

68

SAE API

SHSJSL

20

50

10

32

0

14

-10

-4

-20

15W–40

20W–40

20W–50

Recommended fuel:Regular unleaded gasoline

Min. pump octane number (PON):86




20

motor that contains more than 10% Etha-nol, such as E15 which contains 15% Eth-anol or E85 which contains 85% Ethanol,or gasoline containing any amount ofMethanol. These fuels can cause startingand running problems, as well as seriousfuel system and internal engine damage.

Gasoline containing ethanol has severalproperties that may cause boat fuel systemproblems. Ethanol is a strong solvent (cleaning

agent) that can clean gum and varnish de-posits from a boat’s fuel system, particular-ly in older boats, as well as tanks and pipesused in gasoline distribution. These re-leased deposits contaminate the fuel andcan cause problems, such as clogged fuelfilters, carburetors, or fuel injectors, whichcould result in engine damage.

Ethanol may dissolve resins used in theconstruction of fiberglass fuel tanks. Thedissolved resins contaminate the fuel andcan cause problems, such as clogged fuelfilters, carburetors, or fuel injectors, whichcould result in engine damage.

Ethanol is hygroscopic (has a strong at-traction to water). Therefore, any waterthat inadvertently enters the fuel system,including moisture that is absorbed fromthe air, will mix with the ethanol in the gas-oline. If the amount of water is excessive,the ethanol and water mixture will separatefrom the gasoline in a layer at the bottomof the fuel tank. This ethanol and watermixture is very corrosive to aluminum fueltanks and fuel system components.

The usable life span of E10 gasoline maybe shorter than the normal length of off-season boat storage, causing starting andrunning problems related to stale fuel.

For more information on using fuel contain-

ing ethanol, visit: http://www.yamaha-mo-tor.comGasoline FiltrationYamaha outboard motors are equipped withinternal fuel filters. However, excessive wa-ter or debris entering your engine’s fuel sys-tem could prematurely clog the internalfilters, causing starting and running prob-lems, fuel system damage, and internal en-gine damage. Therefore, it is recommendedthat an external 10-micron water-separatingfuel filter be installed on your boat and ser-viced frequently. Consult your authorizedYamaha dealer for a 10-micron filter thatmeets your engine’s requirements.EMU41342

Gasoline AdditivesGasoline blends change to meet automobileemission regulations and economic condi-tions. Additives, added by gasoline distribu-tors, necessary for proper automobile engineoperation and durability, may not be suffi-cient for typical boat applications. Intakevalve and combustion chamber depositsmay accumulate in boat engines more rapid-ly than encountered in automotive use. In ad-dition, gasoline used for boating will typicallyage longer between refills than gasolineused in automobiles, resulting in stale andunusable gasoline that may cause startingand running problems, fuel system damage,and internal engine damage.Yamaha recommends the use of two Yama-lube gasoline additives to reduce internal de-posits and extend the storage life ofgasoline. Continuous use of Yamalube RingFree Fuel Additive Plus reduces harmful in-ternal deposits. Yamalube Fuel Stabilizer &Conditioner Plus added to fresh gasoline willhelp protect the fuel system from varnishingwhile helping to keep the gasoline’s octane




21

level from decreasing excessively duringstorage. Other additives may also be avail-able on the market that may have varying de-grees of effectiveness. Consult your Yamahadealer concerning what may work best forthe locally available gasoline and environ-mental conditions.EMU36881

Muddy or acidic waterYamaha strongly recommends that you haveyour dealer install the optional chromium-plated water pump kit if you use the outboardmotor in muddy or acidic water conditions.However, depending on the model it mightnot be required.EMU41354

Anti-fouling paintA clean hull is required to maintain yourboat’s performance. Boats moored in the wa-ter should be protected from marine growth(barnacles, mussels, and marine plants). Ifapproved by regulations for your area, thebottom of the hull can be coated with an anti-fouling paint to inhibit marine growth.Anti-fouling paints specifically formulated foruse on aluminum may be applied to the out-board motor. The original Yamaha paint sur-face may be scuffed lightly before applyinganti-fouling paint, but do not remove the orig-inal paint. Removal of the original paint willincrease the rate of corrosion.

NOTICEECM04821

Anti-fouling paint for fiberglass andwood may contain materials, such ascopper, graphite, and tin, that cancause corrosion if applied to aluminumboats and outboard motor compo-nents. Never apply these types of paintto your outboard motor because rapidcorrosion damage could occur.

Anti-fouling paint can increase drag(friction) between the boat and the wa-ter, and possibly affect performance. Ifthe effects are too great, reducing pro-peller pitch may be necessary.

Sacrificial anodes are attached to the out-board motor to provide corrosion protectionand must never be painted.Sacrificial anodes made from a different ma-terial may be necessary for maximum corro-sion protection due to your local waterconditions. Please consult your Yamahadealer.

NOTICEECM02421

Painted sacrificial anodes will not providecorrosion protection.

EMU40302

Outboard motor disposal requirements

Never illegally discard (dump) the outboardmotor. Yamaha recommends consulting thedealer about discarding the outboard motor.EMU36353

Emergency equipmentKeep the following items onboard in casethere is trouble with the outboard motor. A tool kit with assorted screwdrivers, pli-

ers, wrenches (including metric sizes), andelectrical tape.




22

Waterproof flashlight with extra batteries. An extra engine shut-off cord (lanyard)

with clip. Spare parts, such as an extra set of spark

plugs.Consult your Yamaha dealer for details.EMU25223

Emission control information EMU25232

This engine conforms to U.S. EnvironmentalProtection Agency (EPA) regulations for ma-rine SI engines. See the label affixed to yourengine for details.EMU25245

Approval label of emission control certif-icateThis label is attached at the location shown.New Technology; (4-stroke/HPDI) EM

EMU25275

Star labelsYour outboard motor is labeled with a Cali-fornia Air Resources Board (CARB) star la-bel. See below for a description of yourparticular label.

EMU40331

One Star—Low EmissionThe one-star label identifies engines thatmeet the Air Resources Board’s PersonalWatercraft and Outboard marine engine2001 exhaust emission standards. Enginesmeeting these standards have 75% loweremissions than conventional carbureted two-stroke engines. These engines are equiva-lent to the U.S. EPA’s 2006 standards formarine engines.

1. Approval label location

1

ZMU08258

EMISSION CONTROL INFORMATION

THIS ENGINE CONFORMS TO CALIFORNIA EXHAUST AND U.S. EPA EXHAUST AND EVAP REGULATIONS

FOR SI MARINE ENGINES. REFER TO OWNER’S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.

FAMILY: MAX POWER: kW DISPLACEMENT: liters EPA/CA FEL: HC + NOx

, CO

g/kW

-h

YAMAHA MOTOR CO.,LTD.

1. Star label location

ZMU05623

1

ZMU01702




23

EMU40341

Two Stars—Very Low EmissionThe two-star label identifies engines thatmeet the Air Resources Board’s PersonalWatercraft and Outboard marine engine2004 exhaust emission standards. Enginesmeeting these standards have 20% loweremissions than One Star-Low-Emission en-gines.

EMU40351

Three Stars—Ultra Low EmissionThe three-star label identifies engines thatmeet the Air Resources Board’s PersonalWatercraft and Outboard marine engine2008 exhaust emission standards or theSterndrive and Inboard marine engine 2003-2008 exhaust emission standards. Enginesmeeting these standards have 65% loweremissions than One Star-Low-Emission en-gines.

EMU33862

Four Stars—Super Ultra Low EmissionThe four-star label identifies engines thatmeet the Air Resources Board’s Sterndriveand Inboard marine engine 2009 exhaustemission standards. Personal Watercraftand Outboard marine engines may alsocomply with these standards. Engines meet-ing these standards have 90% lower emis-sions than One Star-Low-Emission engines.

ZMU01703

ZMU01704

ZMU05663



24

ComponentsEMU46722

Components diagramTIP:* May not be exactly as shown; also may not be included as standard equipment on all mod-els (order from dealer).F15EHA, F15PHA, F20EA, F20EHA, F20PA, F20PHA

ZMU07498

1011

13

1415

1723

1819

20

21

2212

24

10

15

171920

21

16

1

2

3

9

8

6

7

4

5

1. Top cowling2. Cowling lock lever3. Drain screw4. Anti-cavitation plate5. Trim tab6. Propeller7. Cooling water inlet8. Trim rod*9. Clamp bracket10. Alert indicator11. Gear shift lever*12. Engine stop button/Engine shut-off switch*13. Throttle friction adjuster*14. Throttle grip*15. Power tilt switch*

16. Clip*17. Clamp screw18. Steering friction adjuster*19. Restraint cable attachment20. Tilt support knob*21. Flushing device22. Starter button*23. Fuel tank*24. Remote control box (side mount type)*



Components

25

F15MHA, F20MHA

EMU25804

Fuel tankIf your model was equipped with a portablefuel tank, its function is as follows.

WARNINGEWM00021

The fuel tank supplied with this engine isits dedicated fuel reservoir and must notbe used as a fuel storage container. Com-mercial users should conform to relevantlicensing or approval authority regula-tions.

ZMU07413

1 10

11 12

14

13

1517

1820

2

3

9

8

4

5

6

21

22

7

19

16

1. Top cowling2. Cowling lock lever3. Drain screw4. Anti-cavitation plate5. Trim tab6. Propeller7. Cooling water inlet8. Trim rod9. Clamp bracket10. Manual starter handle11. Alert indicator12. Gear shift lever13. Engine stop button/Engine shut-off switch14. Throttle grip15. Throttle friction adjuster16. Clip17. Tilt lock lever18. Clamp screw19. Restraint cable attachment20. Steering friction adjuster

21. Flushing device22. Fuel tank*



Components

26

EMU25831

Fuel jointThis joint is used to connect the fuel line.EMU43121

Fuel gaugeThis gauge shows the approximate amountof fuel remaining in the fuel tank.EMU43151

Pressure relief tabThis is attached to the filler hole of the fueltank.EMU43131

Fuel tank capThis cap seals the fuel tank. To loosen thecap, press and hold the pressure relief taband turn the cap counterclockwise.EMU43142

Air vent screwThis screw is on the fuel tank cap. Whenturning the air vent screw counterclockwise,it is loosened and the pressure in the fueltank is released to a certain pressure. Air is

allowed to enter the fuel tank while operatingthe engine.EMU26182

Remote control boxThe remote control lever actuates both theshifter and the throttle. The electrical switch-es are mounted on the remote control box.

EMU26191

Remote control leverMoving the lever forward from the neutral po-sition engages forward gear. Pulling the le-ver back from neutral engages reverse. Theengine will continue to run at idle until the le-ver is moved about 35 (a detent can be felt).Moving the lever farther opens the throttle,and the engine will begin to accelerate.

1. Fuel joint2. Fuel gauge3. Pressure relief tab4. Fuel tank cap5. Air vent screw

1 2

3

3

5

4

ZMU07442

1. Power tilt switch2. Remote control lever3. Neutral interlock trigger4. Neutral throttle lever5. Main switch6. Engine shut-off switch7. Throttle friction adjuster

12 3

5

4

6

7

ZMU01723



Components

27

EMU26202

Neutral interlock triggerTo shift out of neutral, first pull the neutral in-terlock trigger up.

EMU26213

Neutral throttle leverTo open the throttle without shifting into ei-ther forward or reverse, put the remote con-trol lever in the neutral position and lift theneutral throttle lever.

TIP:The neutral throttle lever will operate onlywhen the remote control lever is in neutral.The remote control lever will operate onlywhen the neutral throttle lever is in the closedposition.EMU25914

Tiller handle To change direction, move the tiller handle tothe left or right as necessary.

EMU25925

Gear shift lever Move the gear shift lever forward to engagethe forward gear or rearward to engage thereverse gear.

1. Neutral “ ”2. Forward “ ”3. Reverse “ ”4. Shift5. Fully closed6. Throttle7. Fully open

1. Neutral interlock trigger

12 34 4

556

6 7

7

FN

R

ZMU01725

1

ZMU01727

1. Fully open2. Fully closed

1

2

N

ZMU01728

ZMU01997



Components

28

EMU25943

Throttle grip The throttle grip is on the tiller handle. Turnthe grip counterclockwise to increase speedand clockwise to decrease speed.

EMU25963

Throttle indicator The fuel consumption curve on the throttleindicator shows the relative amount of fuelconsumed for each throttle position. Choosethe setting that offers the best performanceand fuel economy for the desired operation.

EMU25978

Throttle friction adjusterA friction device provides adjustable resis-tance to movement of the throttle grip or theremote control lever, and can be set accord-ing to operator preference.To increase resistance, turn the adjusterclockwise. To decrease resistance, turn theadjuster counterclockwise. WARNING! Donot overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to move the remote control leveror throttle grip, which could result in anaccident. [EWM00033]

1. Forward “ ”2. Neutral “ ”3. Reverse “ ”

ZMU05519

R

F1

23 N

1. Throttle indicator

ZMU05337

1

ZMU01714



Components

29

When constant speed is desired, tighten theadjuster to maintain the desired throttle set-ting.EMU25996

Engine shut-off cord (lanyard) and clipThe clip must be attached to the engine shut-off switch for the engine to run. The cordshould be attached to a secure place on theoperator’s clothing, or arm or leg. Should theoperator fall overboard or leave the helm, thecord will pull out the clip, stopping ignition tothe engine. This will prevent the boat fromrunning away under power. WARNING! At-tach the engine shut-off cord to a secureplace on your clothing, or your arm or legwhile operating. Do not attach the cord toclothing that could tear loose. Do notroute the cord where it could become en-tangled, preventing it from functioning.Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power, theboat could slow rapidly. This could causepeople and objects in the boat to bethrown forward. [EWM00123]

EMU26004

Engine stop button The engine stop button stops the enginewhen the button is pushed.

ZMU02001

1. Engine shut-off cord (lanyard)2. Clip3. Engine shut-off switch

1. Engine shut-off cord (lanyard)2. Clip3. Engine shut-off switch

ZMU01716

1

2

3

2

1

3

ZMU02003



Components

30

EMU26075

Manual starter handleThe manual starter handle is used to crankand start the engine.

EMU26083

Starter buttonTo start the engine with the electric starter,push the starter button.

EMU26092

Main switchThe main switch controls the ignition system;its operation is described below. “ ” (off)With the main switch in the “ ” (off) posi-tion, the electrical circuits are off, and the keycan be removed. “ ” (on)With the main switch in the “ ” (on) posi-tion, the electrical circuits are on, and the keycannot be removed. “ ” (start)With the main switch in the “ ” (start) po-sition, the starter motor turns to start the en-gine. When the key is released, it returnsautomatically to the “ ” (on) position.

EMU26103

Power tilt switchThe power tilt system adjusts the outboardmotor angle in relation to the transom. Push-ing the switch “ ” (up) tilts the outboard mo-tor up. Pressing the switch “ ” (down) tiltsthe outboard motor down. When the switch isreleased, the outboard motor will stop in itscurrent position.

ZMU02083

ZMU05536

ZMU05521

ONSTARTOFF

ZMU01718



Components

31

TIP:For instructions on using the power tiltswitch, see pages 57 and 60.EMU31433

Steering friction adjusterA friction device provides adjustable resis-tance to the steering mechanism, and can beset according to operator preference. An ad-juster lever is located on the bottom of the til-ler handle bracket.To increase resistance, turn the lever to the

port side “A”.To decrease resistance, turn the lever to thestarboard side “B”.

WARNINGEWM00041

Do not overtighten the friction adjuster. Ifthere is too much resistance, it could bedifficult to steer, which could result in anaccident.

If the resistance does not increase evenwhen the lever is turned to the port side “A”,make sure that the nut is tightened to thespecified torque.

TIP: Steering movement is blocked when the

adjuster lever is set to the “A” position.

DNUP

ZMU01720

ZMU05579

UP

DN

DN UPZMU04899

1. Nut

Nut tightening torque:8 N·m (0.8 kgf·m, 5.9 lb·ft)

ZMU05522

A

B

ZMU05523

1



Components

32

Check the tiller handle for smooth move-ment when the lever is turned to the star-board side “B”.

Do not apply lubricants such as grease tothe friction areas of the steering friction ad-juster.

EMU26254

Trim tab

WARNINGEWM00841

An improperly adjusted trim tab couldcause difficult steering. Always test runafter the trim tab has been installed or re-placed to be sure steering is correct. Besure you have tightened the bolt after ad-justing the trim tab.

The trim tab should be adjusted so that thesteering control can be turned to either theright or left by applying the same amount offorce.If the boat tends to veer to the left (port side),turn the trim tab rear end to the port side “A”in the figure.If the boat tends to veer to the right (star-board side), turn the trim tab end to the star-board side “B” in the figure.

EMU26263

Trim rod (tilt pin)The position of the trim rod determines theminimum trim angle of the outboard motor inrelation to the transom.

EMU30531

Tilt lock mechanismThe tilt lock mechanism is used to preventthe outboard motor from lifting out of the wa-ter when in reverse gear.

1. Trim tab2. Bolt

ZMU05524

1

2

BA

Bolt tightening torque:8 N·m (0.8 kgf·m, 5.9 lb·ft)

1. Tilt lock lever (Lock / tilt-down)

ZMU05525

ZMU05526

1



Components

33

To lock it, set the tilt lock lever in the lock po-sition. To release, push the tilt lock lever inthe release position.EMU26323

Tilt support knobTo keep the outboard motor in the tilted upposition, push the tilt support knob under theswivel bracket.

NOTICEECM00661

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tilt sup-port and fall. If the motor cannot betrailered in the normal running position,use an additional support device to se-cure it in the tilt position.

EMU26334

Tilt support barThe tilt support bar keeps the outboard motorin the tilted up position.

NOTICEECM01661

Do not use the tilt support bar whentrailering the boat. The outboard motorcould shake loose from the tilt supportand fall. If the motor cannot be trailered inthe normal running position, use an addi-tional support device to secure it in thetilt position.

EMU26362

Power tilt unitThis unit tilts the outboard motor up anddown and is controlled with the power tiltswitch.

NOTICEECM00631

Do not step on or exert pressure on thepower tilt motor. The power tilt unit couldbe damaged as a result.

1. Tilt lock lever (Release / tilt-up)

ZMU05631

1

ZMU02812

ZMU05528



Components

34

NOTICEECM00661

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tilt sup-port and fall. If the motor cannot betrailered in the normal running position,use an additional support device to se-cure it in the tilt position.

EMU39264

Cowling lock leverThe cowling lock lever(s) is used to securethe top cowling.

EMU26464

Flushing deviceThis device is used to clean the cooling wa-

ter passages of the motor using a gardenhose and tap water.

TIP:For details on usage, see page 71.EMU26305

Alert indicator If the engine develops a condition which iscause for alert, the indicator lights up. Fordetails on how to read the alert indicator, seepage 36.

1. Power tilt unit2. Power tilt motor

1. Cowling lock lever

1

ZMU07818

1. Flushing device

1. Alert indicator

ZMU05597

1

ZMU05530

1



35

Instruments and indicatorsEMU36016

Indicators EMU36026

Low oil pressure-alert indicatorIf oil pressure drops too low, this indicator willlight up. For further information, see page 36.

NOTICEECM00024

Do not continue to run the engine if thelow oil pressure-alert indicator is onand the engine oil level is lower. Seri-ous engine damage will occur.

The low oil pressure-alert indicatordoes not indicate the engine oil level.Use the oil dipstick to check the oil lev-el. For further information, see page 43.

EMU36034

Overheat-alert indicatorIf the engine temperature rises too high, thisindicator will light up. For further informationon reading the indicator, see page 36.

NOTICEECM00053

Do not continue to run the engine if theoverheat-alert indicator is on. Serious en-gine damage will occur.

1. Low oil pressure-alert indicator

ZMU06256

1

1. Overheat-alert indicator

ZMU06257

1



36

Engine control systemEMU26806

Alert system

NOTICEECM00093

Do not continue to operate the engine ifan alert device has activated. Consultyour Yamaha dealer if the problem cannotbe located and corrected.

EMU43754

Overheat alertThis engine has an overheat-alert device. Ifthe engine temperature rises too high, thealert device will activate. The engine speed will automatically de-

crease to 2000–3500 r/min. The overheat-alert indicator will light or

blink (if equipped).

The buzzer will sound (if equipped on thetiller handle, remote control box, or mainswitch panel).

If the alert system has activated, stop the en-

gine and check the cooling water inlets: Check trim angle to be sure that the cool-

ing water inlet is submerged. Check the cooling water inlet for clogging.

EMU26869

Low oil pressure alertIf the oil pressure drops too low, the alert de-vice will activate. The engine speed will automatically de-

crease to about 2000–3500 r/min. The low oil pressure-alert indicator will

light or blink (if equipped).

The buzzer will sound (if equipped).

ZMU05592

ZMU02360

ZMU03026

ZMU05531



Engine control system

37

If the alert system has activated, stop the en-gine as soon as it is safe to do so. Check theoil level and add oil as needed. If the oil levelis correct, consult your Yamaha dealer.

ZMU02360



38

InstallationEMU26903

InstallationThe information presented in this section isintended as reference only. It is not possibleto provide complete instructions for everypossible boat and motor combination. Propermounting depends in part on experience andthe specific boat and motor combination.

WARNINGEWM01591

Overpowering a boat could cause se-vere instability. Do not install an out-board motor with more horsepowerthan the maximum rating on the capac-ity plate of the boat. If the boat does nothave a capacity plate, consult the boatmanufacturer.

Improper mounting of the outboard mo-tor could result in hazardous condi-tions such as poor handling, loss ofcontrol, or fire hazards. For permanent-ly mounted models, your dealer or oth-er person experienced in proper riggingshould mount the motor.

EMU32012

Mounting the outboard motor1. Be sure to mount the outboard motor

while the boat is on land. If the boat is onthe water, move it to an area on land.

2. To prevent steering movement, turn theadjuster lever to “A”.

3. Hold the handgrips and steering brack-ets as shown in the illustration and lift upthe outboard motor using two people.

4. Mount the outboard motor on the centerZMU05632

A

1. Steering bracket2. Handgrip

ZMU05633

1

1

2

2

ZMU05634



Installation

39

line (keel line) of the boat, and ensurethat the boat itself is well balanced. Oth-erwise the boat will be hard to steer. Forboats without a keel or which are asym-metrical, consult your dealer.

EMU26926

Mounting heightTo run your boat at optimum efficiency, thewater resistance (drag) of the boat and out-board motor must be made as little as possi-ble. The mounting height of the outboardmotor greatly affects the water resistance. Ifthe mounting height is too high, cavitationtends to occur, thus reducing the propulsion;and if the propeller tips cut the air, the enginespeed will rise abnormally and cause the en-gine to overheat. If the mounting height is toolow, the water resistance will increase andthereby reduce engine efficiency. Mount theoutboard motor so that the anti-cavitationplate is between the bottom of the boat anda level 25 mm (1 in) below it.

NOTICEECM01635

Make sure that the idle hole is highenough to prevent water from enteringthe engine even if the boat is stationarywith the maximum load.

Incorrect engine height or obstructionsto the smooth flow of water (such as thedesign or condition of the boat, or ac-cessories, such as transom ladders ordepth finder transducers) can createairborne water spray while the boat iscruising. If the outboard motor is oper-ated continuously in the presence ofairborne water spray, enough watercould enter the engine through the airintake opening in the top cowling tocause severe engine damage. Removethe cause of the airborne water spray.

TIP: The optimum mounting height of the out-

board motor is affected by the boat andmotor combination and the desired use.Test runs at different heights can help de-termine the optimum mounting height.Consult your Yamaha dealer or boat man-ufacturer for further information on deter-mining the proper mounting height.

For instructions on setting the trim angle ofthe outboard motor, see page 57.

1. Center line (keel line)

ZMU017601



Installation

40

EMU26974

Clamping the outboard motor1. Place the outboard motor on the tran-

som so that it is positioned as close tothe center as possible. Tighten the tran-som clamp screws evenly and securely.Occasionally check the clamp screws fortightness during operation of the out-board motor because they could be-come loose due to engine vibration.WARNING! Loose clamp screwscould allow the outboard motor to falloff or move on the transom. Thiscould cause loss of control and seri-ous injury. Make sure the clampscrews are tightened securely. Occa-sionally check the screws for tight-ness during operation. [EWM00643]

2. If the restraint cable attachment isequipped on your engine, a restraint ca-ble or chain should be used. Attach oneend to the restraint cable attachmentand the other to a secure mounting pointon the boat. Otherwise the engine couldbe completely lost if it accidentally fallsoff the transom.

3. Secure the clamp bracket to the transomusing the bolts provided with the out-board (if packed). For details, consultyour Yamaha dealer. WARNING! Avoidusing bolts, nuts or washers otherthan those contained in the enginepackaging. If used, they must be of atleast the same quality of material andstrength and must be tightened se-curely. After tightening, test run theengine and check their tightness.[EWM00652]

ZMU02012

1. Bolts

ZMU02013

ZMU02637

1



41

OperationEMU36382

First-time operationEMU36393

Fill engine oilThe engine is shipped from the factory with-out engine oil. If your dealer did not fill the oil,you must fill it before starting the engine.NOTICE: Check that the engine is filledwith oil before first-time operation toavoid severe engine damage. [ECM01782]

The engine is shipped with the following tag,which should be removed after engine oil isfilled for the first time. For more informationon checking the engine oil level, see page43.

EMU30175

Breaking in engineYour new engine requires a period of break-in to allow mating surfaces of moving parts towear in evenly. Correct break-in will help en-sure proper performance and longer enginelife. NOTICE: Failure to follow the break-in

procedure could result in reduced enginelife or even severe engine damage. [ECM00802]

EMU27086

Procedure for 4-stroke modelsYour new engine requires a period of 10hours break-in to allow mating surfaces ofmoving parts to wear in evenly.

TIP:Run the engine in the water, under load (ingear with a propeller installed) as follows.For 10 hours for breaking in engine avoid ex-tended idling, rough water and crowded ar-eas.1. For the first hour of operation:

Run the engine at varying speeds up to2000 r/min or approximately half throttle.

2. For the second hour of operation:Increase engine speed as much as nec-essary to put the boat on plane (butavoid full-throttle operation), then backoff on the throttle while keeping the boatat a planing speed.

3. Remaining 8 hours:Run the engine at any speed. However,avoid operating at full throttle for morethan 5 minutes at a time.

4. After the first 10 hours:Operate the engine normally.

EMU36402

Getting to know your boatAll boats have unique handling characteris-tics. Operate cautiously while you learn howyour boat handles under different conditionsand various trim angles (see page 57).EMU36414

Checks before starting engine

WARNINGEWM01922

If any item in “Checks before starting en-gine” is not working properly, have it in-spected and repaired before operatingthe outboard motor. Otherwise, an acci-

ZMU01710



Operation

42

dent could occur.

NOTICEECM00121

Do not start the engine out of water. Over-heating and serious engine damage canoccur.

EMU36561

Fuel levelBe sure you have plenty of fuel for your trip.A good rule is to use 1/3 of your fuel to get tothe destination, 1/3 to return, and to keep 1/3as an emergency reserve. With the boat lev-el on a trailer or in the water, check the fuellevel. For fuel filling instructions, see page45.EMU36573

Remove the top cowlingFor the following checks, remove the topcowling from the bottom cowling. To removethe top cowling, release the cowling lock le-ver and lift off the top cowling.

EMU36443

Fuel system

WARNINGEWM00061

Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other sourc-es of ignition.

WARNINGEWM00911

Leaking fuel can result in fire or explo-sion. Check for fuel leakage regularly. If any fuel leakage is found, the fuel

system must be repaired by a qualifiedmechanic. Improper repairs can makethe outboard unsafe to operate.

EMU36453

Check for fuel leaks Check for fuel leaks or gasoline fumes in

the boat. Check for fuel leakage from the fuel sys-

tem. Check the fuel tank and fuel lines for

cracks, swellings, or other damage.EMU37323

Checking the fuel filterCheck that the fuel filter is clean and free ofwater. If any water is found in the fuel, or if asignificant amount of debris is found, the fueltank should be checked and cleaned by aYamaha dealer.

EMU36903

ControlsTiller handle models: Move the tiller handle fully to the left and

right to make sure operation is smooth. Turn the throttle grip from the fully closed

to the fully open position. Make sure that it

ZMU06169



Operation

43

turns smoothly and that it completely re-turns to the fully closed position.

Look for loose or damaged connections ofthe throttle and shift cables.

Remote control models: Turn the steering wheel full-right and full-

left. Make sure operation is smooth andunrestricted throughout the whole rangewith no binding or excessive free play.

Operate the throttle levers several times tomake sure there is no hesitation in theirtravel. Operation should be smooth overthe complete range of motion, and each le-ver should return completely to the idle po-sition.

Look for loose or damaged connections ofthe throttle and shift cables.

EMU36484

Engine shut-off cord (lanyard)Inspect the engine shut-off cord and clip fordamage, such as cuts, breaks, and wear.

EMU40994

Engine oil1. Place the outboard motor in a vertical

position (not tilted). NOTICE: If the out-board motor is not level, the oil levelindicated on the oil dipstick may notbe accurate. [ECM01862]

2. Remove the oil dipstick and wipe it

clean.

3. Insert the oil dipstick completely and re-move it again.

4. Check that the oil level on the oil dipstickis between the upper and lower marks.Consult your Yamaha dealer if the oillevel is not at the proper level or if it ap-pears milky or dirty.

EMU27154

Engine Check the engine and engine mounting. Look for loose or damaged fasteners. Check the propeller for damage. Check for engine oil leaks.

1. Clip2. Engine shut-off cord (lanyard)

ZMU06873

1

2

1. Oil dipstick

1. Lower mark2. Oil dipstick3. Upper mark

ZMU08040

1

2

1

3

ZMU08041



Operation

44

EMU36494

Flushing deviceCheck that the flushing device’s garden hoseconnector is securely screwed on to the fit-ting on the bottom cowling. NOTICE: If thegarden hose connector is not properlyconnected, cooling water can leak outand the engine can overheat during oper-ation. [ECM01802]

EMU36956

Install top cowling1. Be sure that the cowling lock lever is re-

leased.2. Be sure that the rubber seal is seated all

the way around the top cowling.3. Place the top cowling on the bottom

cowling.4. Check to be sure the rubber seal is seat-

ed correctly between the top cowlingand the bottom cowling.

5. Move the cowling lock lever to lock thetop cowling as shown. NOTICE: If thetop cowling is not installed correctly,water spray under the top cowlingcan damage the engine, or the topcowling can blow off at high speeds.[ECM01992]

After installing, check the fitting of the topcowling by pushing it with both hands. If thetop cowling is loose, have it repaired by yourYamaha dealer.

EMU34783

Checking power tilt system

WARNINGEWM01971

Never get under the lower unit while itis tilted, even when the tilt supportknob is locked. Severe injury could oc-cur if the outboard motor accidentallyfalls.

Body parts can be crushed between themotor and the clamp bracket when themotor is trimmed or tilted.

Be sure no one is near the outboardmotor before performing this check.

1. Check the power tilt unit for any sign ofoil leaks.

1. Fitting2. Flushing device

ZMU06172

2

1

ZMU06136



Operation

45

2. Operate each of the power tilt switchesto check that all switches work.

3. Tilt the outboard motor up and checkthat the tilt rod is pushed out completely.

4. Check that the tilt rod is free of corrosionor other flaws.

5. Tilt the outboard motor down. Check thatthe tilt rod operates smoothly.

EMU36585

BatteryCheck the battery’s charge. If your boat isequipped with a Yamaha digital speedome-ter, the voltmeter and low battery alert func-tions will help you monitor the battery’scharge. A battery in good condition will pro-vide a minimum of 12 volts. Check that thebattery connections are clean, secure andcovered by insulating covers. The electricalconnections of the battery and cables mustbe clean and properly connected or the bat-tery will not start the engine.If the battery needs charging, consult yourYamaha dealer or the battery manufacturer’sinstructions.EMU43164

Filling fuel

WARNINGEWM01831

Gasoline and its vapors are highly flam-

mable and explosive. Always refuel ac-cording to this procedure to reduce therisk of fire and explosion.

Gasoline is poisonous and can causeinjury or death. Handle gasoline withcare. Never siphon gasoline by mouth.If you should swallow some gasoline orinhale a lot of gasoline vapor, or getsome gasoline in your eyes, see yourdoctor immediately. If gasoline spillson your skin, wash with soap and wa-ter. If gasoline spills on your clothing,change your clothes.

Before refueling, check the following points: Ensure the engine is stopped. Securely moor the boat in a well-ventilated

area and stop the engine. If the boat istrailered, ensure it is stable.

Do not smoke and keep away from sparks,flames, static electric discharges, or othersources of ignition.

If you use a portable container to store anddispense fuel, use only a locally approvedGASOLINE container.

To prevent electrostatic sparks, dischargeany built-up static electricity from yourbody before refueling.

1. Disconnect the fuel hose from the fueljoint on the fuel tank.

1. Tilt rod

1. Fuel joint

ZMU07443

2 1



Operation

46

2. Turn the air vent screw clockwise toclose it.

3. Remove the fuel tank from the boat.4. To loosen the air vent screw, turn it

counterclockwise until it stops.

5. While pressing and holding the pressurerelief tab under the fuel tank cap, slowlyturn the fuel tank cap counterclockwise1/4 turn.

TIP:Release the fuel vapor contained in the fueltank.6. While pressing and holding the pressure

relief tab under the fuel tank cap again,turn the fuel tank cap counterclockwiseto remove it.

7. Fill the fuel tank with fuel. WARNING!Do not overfill. Otherwise fuel can ex-pand and overflow if the temperatureincreases. [EWM02611]

2. Fuel hose

1. Air vent screw

1. Air vent screw

1

ZMU07444

1

ZMU07445

1. Pressure relief tab2. Fuel tank cap

1. Pressure relief tab2. Fuel tank cap

Fuel tank capacity:25 L (6.61 US gal, 5.50 Imp.gal)

1

2

ZMU07446

1

2

ZMU07447



Operation

47

TIP: Wipe up any spilled gasoline immediately

with dry rags. Dispose of rags properly according to local

laws or regulations.8. Turn the fuel tank cap clockwise to tight-

en until a click is heard.

9. Turn the air vent screw clockwise toclose it.

EMU27453

Operating engine

WARNINGEWM00421

Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in thewater near you.

When the air vent screw is loosened,gasoline vapor will be released. Gaso-line is highly flammable, and its vaporsare flammable and explosive. Refrainfrom smoking, and keep away fromopen flames and sparks while loosen-ing the air vent screw.

This product emits exhaust gaseswhich contain carbon monoxide, a col-orless, odorless gas which could causebrain damage or death when inhaled.Symptoms include nausea, dizziness,and drowsiness. Keep cockpit and cab-in areas well ventilated. Avoid blockingexhaust outlets.

EMU43174

Sending fuel (portable tank)1. To loosen the air vent screw, turn it

counterclockwise until it stops.

1. Fuel tank cap

ZMU07448

1

ZMU07449

1. Air vent screw

1

ZMU07444



Operation

48

2. Check the direction of the fuel hose.Make sure that the arrow of the primerpump points toward the outboard motor.

3. Align the fuel joint on the fuel hose withthe fuel joint on the outboard motor andfirmly connect the fuel hose to the jointwhile pinching the joint.

4. Firmly connect the other end of the fuelhose to the joint on the fuel tank.

5. Wipe up any spilled gasoline immediate-ly with dry rags.

TIP:Dispose of rags properly according to locallaws or regulations.6. Squeeze the primer pump, with the ar-

row pointing up, until you feel it becomefirm. During engine operation, place thetank horizontally, otherwise fuel cannotbe drawn from the fuel tank.

1. Air vent screw

1. Toward the outboard motor2. Arrow3. Primer pump4. Toward the fuel tank

1

ZMU07445

ZMU07452

1 43

2

1. Fuel joint2. Fuel hose


ZMU08026

1 2

ZMU07455

2 1



Operation

49

TIP: When using the fuel tank on the boat, a

fuel valve may also be equipped on theboat. Open the fuel valve.

Check the boat’s manual for the position ofthe fuel valve.

EMU27495

Starting engine

WARNINGEWM01601

Before starting the engine, make surethat the boat is tightly moored and thatyou can steer clear of any obstructions.Be sure there are no swimmers in the wa-ter near you.

EMU39014

Manual start/prime start models

WARNINGEWM01842

Failure to attach the engine shut-offcord could result in a runaway boat ifoperator is ejected. Attach the engineshut-off cord to a secure place on yourclothing, or your arm or leg while oper-ating. Do not attach the cord to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it from functioning.

Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

Starting procedure (cold engine)1. Place the gear shift lever in neutral.

TIP:The start-in-gear protection device preventsthe engine from starting except when in neu-tral.2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your armor leg. Then install the clip on the otherend of the cord into the engine shut-offswitch.

3. Place the throttle grip in the “ ”(start) position.

1. Arrow2. Primer pump

ZMU05533

N

ZMU02026



Operation

50

4. Pull the manual starter handle slowly un-til you feel resistance. Then give astrong pull straight out to crank and startthe engine. Repeat if necessary.

5. After the engine starts, slowly return themanual starter handle to its original posi-tion before releasing it.

TIP:When the engine is cold, it needs to bewarmed up. For further information, seepage 54.6. Slowly return the throttle grip to the fully

closed position.Starting procedure (warm engine)1. Place the gear shift lever in neutral.



3. Open the throttle grip as shown in the il-lustration.

ZMU06522

ZMU05536

ZMU05533

N

ZMU02026

ZMU06609



Operation

51

TIP: If the throttle is opened too much, the en-

gine speed rises rapidly, causing the out-board motor to swivel toward the starboardside.

Do not repeat opening and closing of thethrottle grip as this cause the spark plug towet with fuel and prevent from the engineto start.

4. Hold this throttle grip position by tighten-ing the throttle friction adjuster.

5. Pull the manual starter handle slowly un-til you feel resistance. Then give astrong pull straight out to crank and startthe engine. Repeat if necessary.

6. After the engine starts, slowly return themanual starter handle to its original posi-tion before releasing it.

7. Loosen the throttle friction adjuster andreturn the throttle to the fully closed po-sition. WARNING! Loosen the throttle

friction adjuster. If there is too muchresistance, it could be difficult tomove the throttle grip, which couldresult in an accident. [EWM02251]

EMU27606

Electric start/prime start models

WARNINGEWM01842


Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

1. Place the gear shift lever in neutral.


cure place on your clothing, or your arm

ZMU06608

ZMU05536 ZMU05533

N



Operation

52

or leg. Then install the clip on the otherend of the cord into the engine shut-offswitch.

3. Place the throttle grip in the “ ”(start) position. After the engine starts,return the throttle to the fully closed po-sition.

4. Push the starter button to start the en-gine.

5. Immediately after the engine starts, re-lease the starter button and allow it to re-

turn to its original position. NOTICE:Never push the starter button whilethe engine is running. Do not keepthe starter motor turning for morethan 5 seconds. If the starter motor isturned continuously for more than 5seconds, the battery will be quicklydischarged, thus making it impossi-ble to start the engine. The starter canalso be damaged. If the engine willnot start after 5 seconds of cranking,release the starter button, wait 10seconds, then crank the engineagain. [ECM00162]

TIP: When the engine is cold, it needs to be

warmed up. For further information, seepage 54.

If the engine is warm and fails to start,open the throttle slightly and try to start theengine again. If the engine still fails tostart, see page 89.

6. Slowly return the throttle grip to the fullyclosed position.

EMU27666

Electric start and remote control models

WARNINGEWM01842


Avoid accidentally pulling the cord dur-ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,

ZMU02026

ZMU06522

ZMU05521



Operation

53

the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

1. Place the remote control lever in neutral.



3. Turn the main switch to “ ” (on).4. Turn the main switch to “ ” (start),

and hold it for a maximum of 5 seconds.

5. Immediately after the engine starts, re-lease the main switch and allow it to re-turn to “ ” (on). NOTICE: Never turnthe main switch to “ ” (start)while the engine is running. Do notkeep the starter motor turning formore than 5 seconds. If the startermotor is turned continuously formore than 5 seconds, the battery willbe quickly discharged, thus making itimpossible to start the engine. Thestarter can also be damaged. If theengine will not start after 5 secondsof cranking, return the main switch to“ ” (on), wait 10 seconds, thencrank the engine again. [ECM00193]

TIP: When the engine is cold, it needs to be

warmed up. For further information, seepage 54.

If the engine is warm and fails to start,open the throttle slightly and try to start theengine again. If the engine still fails tostart, see page 89.

EMU36511

Checks after starting engineEMU36524

Cooling waterCheck for a steady flow of water from thecooling water pilot hole. A continuous flow ofwater from the pilot hole indicates that the

N

ZMU01771

ZMU01772

ONSTART

ZMU01774



Operation

54

water pump is pumping water through thecooling water passages. If the cooling waterpassages are frozen, it may take a while forwater to start flowing out of the pilot hole.

NOTICEECM01811

If water is not flowing out of the pilot holeat all times while the engine is running,overheating and serious damage couldoccur. Stop the engine and check wheth-er the cooling water inlet on the lowercase or the cooling water pilot hole isblocked. Consult your Yamaha dealer ifthe problem cannot be located and cor-rected.

EMU27671

Warming up engineEMU27718

Manual start and electric start models1. After starting the engine, allow it to idle

for 3 minutes to warm up. NOTICE: Fail-ure to do so will shorten engine life.[ECM04550]

2. Be sure the low oil pressure-alert indica-tor goes off after starting the engine.NOTICE: If the low oil pressure-alertindicator blinks after the enginestarts, stop the engine. Otherwise,serious engine damage could occur.

Check the oil level and add engine oilif necessary. Consult your Yamahadealer if the cause for the low oilpressure alert cannot be found.[ECM01832]

EMU36532

Checks after engine warm upEMU36542

ShiftingWhile the boat is tightly moored, and withoutapplying throttle, confirm that the engineshifts smoothly into forward and reverse, andback to neutral.EMU36981

Stop switches Turn the main switch to “ ”, or press the

engine stop button and make sure the en-gine stops.

Confirm that removing the clip from the en-gine shut-off switch stops the engine.

Confirm that the engine cannot be startedwith the clip removed from the engineshut-off switch.

EMU34563

Shifting

WARNINGEWM00181

Before shifting, make sure there are noswimmers or obstacles in the water nearyou.

NOTICEECM01611

Warm up the engine before shifting intogear. Until the engine is warm, the idlespeed may be higher than normal. Highidle speed can prevent you from shiftingback to neutral. If this occurs, stop theengine, shift to neutral, then restart theengine and allow it to warm up.

To shift out of neutral1. Pull the neutral interlock trigger up (if



Operation

55

equipped).

2. Move the remote control lever / gearshift lever firmly and crisply forward (forforward gear) or backward (for reversegear) [about 35 (a detent can felt) for re-mote control models]. Be sure to checkthat the tilt lock lever is in the lock/downposition (if equipped) before operating inreverse.

TIP:Tiller handle models: The gear shift lever op-erates only when the throttle grip is in the ful-ly closed position.To shift from in gear (forward/reverse) toneutral1. Close the throttle so that the engine

slows to idle speed.

2. After the engine is at idle speed in gearmove the remote control lever / gearshift lever firmly and crisply into the neu-

1. Neutral interlock trigger

1

ZMU01727

ZMU05541

FN

R32˚ 32˚

ZMU05460

ZMU05729

R

F

N

RF

ZMU05462

ZMU02297

START



Operation

56

tral position.

EMU31743

Stopping boat

WARNINGEWM01511

Do not use the reverse function to slowdown or stop the boat as it could causeyou to lose control, be ejected, or im-pact the steering wheel or other parts ofthe boat. This could increase the risk ofserious injury. It could also damage theshift mechanism.

Do not shift into reverse while travelingat planing speeds. Loss of control, boatswamping, or damage to the boat couldoccur.

The boat is not equipped with a separatebraking system. Water resistance stops it af-ter the throttle lever is moved back to idle.The stopping distance varies depending ongross weight, water surface conditions, and

wind direction.EMU27822

Stopping engineBefore stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-ping the engine immediately after operatingat high speed is not recommended.EMU43192

Procedure1. Push and hold the engine stop button or

turn the main switch to “ ” (off).

2. After stopping the engine, disconnectthe fuel hose from the fuel joint on theoutboard motor.

N

ZMU01771

ZMU05533

N

ZMU02083

ONOFF

ZMU01779



Operation

57

3. Disconnect the fuel hose from the fueljoint on the fuel tank.

4. Tighten the air vent screw by turning itclockwise.

5. Remove the key if the boat will be left un-attended.

TIP:The engine can also be stopped by pullingthe cord and removing the clip from the en-gine shut-off switch, then turning the mainswitch to “ ” (off).EMU27865

Trimming outboard motor

WARNINGEWM00741

Excessive trim for the operating condi-tions (either trim up or trim down) cancause boat instability and can makesteering the boat more difficult. This in-creases the possibility of an accident. Ifthe boat begins to feel unstable or is hardto steer, slow down and/or readjust thetrim angle.

The trim angle of the outboard motor helpsdetermine the position of the bow of the boatin the water. Correct trim angle will help im-prove performance and fuel economy whilereducing strain on the engine. Correct trimangle depends upon the combination ofboat, engine, and propeller. Correct trim isalso affected by variables such as the load inthe boat, sea conditions, and running speed.



1. Air vent screw

ZMU08025

1 2

ZMU07443

2 1

1

ZMU07444

1. Trim operating angle



Operation

58

EMU27873

Adjusting trim angle for manual tilt modelsThere are 4 or 5 holes provided in the clampbracket to adjust the outboard motor trim an-gle.1. Stop the engine.2. Tilt the outboard motor up, and then re-

move the trim rod from the clamp brack-et.

3. Reposition the rod in the desired hole.To raise the bow (“trim-out”), move the rodaway from the transom.To lower the bow (“trim-in”), move the rod to-ward the transom.Make test runs with the trim set to differentangles to find the position that works best foryour boat and operating conditions.

WARNINGEWM00401

Stop the engine before adjusting thetrim angle.

Use care to avoid being pinched whenremoving or installing the rod.

Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control.

TIP:The outboard motor trim angle can bechanged approximately 4 degrees by shiftingthe trim rod one hole.EMU27906

Adjusting trim angle (power tilt models)

WARNINGEWM00754

Be sure all people are clear of the out-board motor when adjusting the trimangle. Body parts can be crushed be-tween the motor and the clamp bracketwhen the motor is trimmed or tilted.

Use caution when trying a trim positionfor the first time. Increase speed gradu-ally and watch for any signs of instabil-ity or control problems. Improper trimangle can cause loss of control.

If equipped with a power trim and tiltswitch located on the bottom cowling,use the switch only when the boat is ata complete stop with the engine off. Donot adjust the trim angle with thisswitch while the boat is moving.

1. Move the gear shift lever to the neutralposition.

TIP:While the boat is moving, it may be difficult toadjust the trim angle due to water pressure.Before adjusting the trim angle, reduce theboat speed and shift into neutral.2. Tilt the outboard motor to the desired an-

gle using the power tilt switch.

1. Trim rod

ZMU05601

1



Operation

59

To raise the bow (“trim-out”), tilt the outboardmotor up.To lower the bow (“trim-in”), tilt the outboardmotor down.Make test runs with the trim set to differentangles to find the position that works best foryour boat and operating conditions.

TIP:Stay within the trim operating angle whentrimming the outboard motor using the powertilt system.EMU27913

Adjusting boat trimWhen the boat is on plane, a bow-up attituderesults in less drag, greater stability and effi-ciency. This is generally when the keel line ofthe boat is up about 3 to 5 degrees. With thebow up, the boat may have a greater tenden-cy to steer to one side or the other. Compen-sate for this as you steer. When the bow ofthe boat is down, it is easier to accelerate

from a standing start onto plane.

Bow UpToo much trim-out puts the bow of the boattoo high in the water. Performance and econ-omy are decreased because the hull of theboat is pushing the water and there is moreair drag. Excessive trim-out can also causethe propeller to ventilate, which reduces per-formance further, and the boat may “por-poise” (hop in the water), which could throwthe operator and passengers overboard.

Bow DownToo much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Oper-ating with excessive trim-in at higher speedsalso makes the boat unstable. Resistance atthe bow is greatly increased, heightening thedanger of “bow steering” and making opera-tion difficult and dangerous.

DNUP

ZMU01720

DN UPZMU04899



Operation

60

TIP:Depending on the type of boat, the outboardmotor trim angle may have little effect on thetrim of the boat when operating.EMU27936

Tilting up and downIf the engine will be stopped for some time orif the boat is moored in shallows, the out-board motor should be tilted up to protect thepropeller and lower casing from damage bycollision with obstructions, and also to re-duce salt corrosion.

WARNINGEWM00223

Make sure that no one is near the out-board motor when tilting the outboardmotor up or down. Otherwise, body partscould be crushed between the outboardmotor and the clamp bracket.

WARNINGEWM00251

Leaking fuel is a fire hazard. If there is afuel joint on the outboard motor, discon-nect the fuel line or close the fuel cock ifthe engine will be tilted for more than afew minutes. Otherwise fuel may leak.

NOTICEECM00242

Before tilting the outboard motor, stopthe engine by following the procedure

on page 56. Never tilt the outboard mo-tor while the engine is running. Severedamage from overheating can result.

Do not tilt up the engine by pushing thetiller handle (if equipped) because thiscould break the handle.

EMU43222

Procedure for tilting up (manual tilt models)1. Place the remote control lever / gear

shift lever in neutral.

2. Disconnect the fuel hose from the fueljoint on the outboard motor.

N

ZMU03087

ZMU05533

N



Operation

61

3. Place the tilt lock lever (if equipped) inthe release/up position.

4. Pull up the shallow water lever (ifequipped).

5. Hold the rear of the top cowling with onehand and tilt the engine up fully.

6. Push the tilt support knob into the clampbracket. Or the tilt support bar will turn tothe lock position automatically.NOTICE: Do not use the tilt supportlever or knob when trailering theboat. The outboard motor couldshake loose from the tilt support andfall. If the motor cannot be trailered inthe normal running position, use anadditional support device to secure itin the tilt position. For more detailedinformation, see page 67. [ECM01642]

EMU44650

Procedure for tilting up (power tilt models)1. Place the remote control lever / gear


2. Press the power tilt switch “ ” (up) untilthe outboard motor has tilted up com-pletely.


ZMU08025

1 2

ZMU05548

ZMU05528

N

ZMU01771

ZMU05533

N



Operation

62

3. Push the tilt support knob into the clampbracket to support the engine.WARNING! After tilting the outboardmotor, be sure to support it with thetilt support knob or tilt support lever.Otherwise the outboard motor couldfall back down suddenly if oil in thepower trim and tilt unit or in the pow-er tilt unit loses pressure. [EWM00263]

NOTICE: Do not use the tilt support

lever or knob when trailering theboat. The outboard motor couldshake loose from the tilt support andfall. If the motor cannot be trailered inthe normal running position, use anadditional support device to secure itin the tilt position. For more detailedinformation, see page 67. [ECM01642]

EMU30193

Procedure for tilting down (manual tilt models)1. Place the tilt lock lever in the lock posi-

tion.

2. Slightly tilt the engine up until the tilt sup-port bar is automatically released.

UP

ZMU01787

ZMU05580

UP

UP ZMU04900

ZMU02812

ZMU05541



Operation

63

3. Slowly tilt the engine down.EMU44620

Procedure for tilting down (power tilt models)1. Push the power tilt switch “ ” (up) until

the outboard motor is supported by thetilt rod and the tilt support knob becomesfree.

2. Pull out the tilt support knob.

3. Push the power tilt switch “ ” (down) tolower the outboard motor to the desiredposition.

EMU28063

Shallow water EMU28074

Cruising in shallow water (manual tilt models)

WARNINGEWM01782

Run the boat at the lowest possiblespeed when using the shallow watercruising system. The tilt lock mecha-nism does not work while the shallow

ZMU05528

ZMU02825

DN

ZMU01936

ZMU05581

DN

DN ZMU04901



Operation

64

water cruising system is being used.Hitting an underwater obstacle couldcause the outboard motor to lift out ofthe water, resulting in loss of control.

Use extra care when operating in re-verse. Too much reverse thrust cancause the outboard motor to lift out ofthe water, increasing the chance of ac-cident and personal injury.

NOTICEECM00261

Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-ing can result.

EMU28126

Procedure1. Place the remote control lever / gear


2. Place the tilt lock lever in the release/upposition.

3. Slightly tilt the outboard motor up. Thetilt support bar will lock automatically,supporting the outboard motor in a par-tially raised position. This outboard mo-tor has 2 positions for shallow watercruising.

4. To return the outboard motor to the nor-mal running position, place the remotecontrol lever / gear shift lever in neutral.

5. Place the tilt lock lever in the lock/downposition, then slightly tilt the outboardmotor up until the tilt support bar auto-matically returns to the free position.

N

ZMU03087

ZMU05533

N

ZMU05548



Operation

65

6. Slowly lower the outboard motor to thenormal position.

EMU32862

Power tilt modelsThe outboard motor can be tilted up partiallyto allow operation in shallow water.

NOTICEECM00261

Do not tilt the outboard motor up so thatthe cooling water inlet on the lower unit isabove the surface of the water when set-ting up for and cruising in shallow water.Otherwise severe damage from overheat-ing can result.

EMU32943

Procedure for power tilt models1. Place the remote control lever / gear


2. Slightly tilt the outboard motor up to thedesired position using the power tiltswitch. WARNING! Using the powertilt switch on the bottom cowlingwhile the boat is moving or engine ison could increase the risk of fallingoverboard and could distract the op-erator, increasing the risk of collisionwith another boat or an obstacle.[EWM01961]

3. To return the outboard motor to the nor-

ZMU05541

N

ZMU01771

ZMU05533

N

UP

ZMU01935

UP ZMU04900



Operation

66

mal running position, press the power tiltswitch and slowly tilt the outboard motordown.

EMU28196

Cruising in other conditionsCruising in salt waterAfter operating in salt water, flush the coolingwater passages with fresh water to preventthem from becoming clogged. Also rinse theoutside of the outboard motor with fresh wa-ter.Cruising in muddy, turbid, or acidic waterYamaha strongly recommends that you usethe optional chromium-plated water pump kit(see page 21) if you use the outboard motorin acidic water or water with a lot of sedimentin it, such as muddy or turbid (cloudy) water.After operating in such water, flush the cool-ing passages with fresh water to prevent cor-rosion. Also rinse the outside of the outboardmotor with fresh water.



67

MaintenanceEMU43253

Transporting and storing outboard motor

WARNINGEWM02621

USE CARE when transporting fuel tank,whether in a boat or car.

DO NOT fill fuel container to maximumcapacity. Gasoline will expand consid-erably as it warms up and can build uppressure in the fuel container. This cancause fuel leakage and a potential firehazard.

Leaking fuel is a fire hazard. Whentransporting and storing the outboardmotor, disconnect the fuel line from theoutboard motor to prevent fuel fromleaking.

Never get under the outboard motorwhile it is tilted. Severe injury could oc-cur if the outboard motor accidentallyfalls.

Do not use the tilt support lever or knobwhen trailering the boat. The outboardmotor could shake loose from the tiltsupport and fall. If the outboard motorcannot be trailered in the normal run-ning position, use an additional sup-port device to secure it in the tiltposition.

When storing or transporting the outboardmotor, make sure to follow the procedure list-ed below. Disconnect the fuel hose from the fuel joint

on the outboard motor. Tighten the fuel tank cap and its air vent

screw. Store the fuel tank in a well-ventilated

place. Store the fuel tank in a place that is stable

and not exposed to shocks.

When the outboard motor is tilted for a pro-longed time for mooring or trailering the boat,make sure to follow the procedure listed be-low. Disconnect the fuel hose from the fuel joint

on the outboard motor. Tighten the fuel tank cap and its air vent

screw.The outboard motor should be transportedand stored in the normal running position. Ifthere is insufficient road clearance in this po-sition, then trailer the outboard motor in thetilt position using a motor support devicesuch as a transom saver bar. Consult yourYamaha dealer for further details.EMU43272

Dismounting the outboard motor1. Stop the engine and land the boat.2. Disconnect the fuel hose from the fuel

joint on the outboard motor.3. For electric start models, disconnect the

battery cables from the battery termi-nals.

4. To prevent steering movement, turn theadjuster lever to “A”.

5. Loosen the clamp screw(s).6. Hold the handgrips and steering brack-

ets as shown in the illustration and lift upthe outboard motor to dismount it fromthe boat.

ZMU05632

A



Maintenance

68

7. When transporting or storing the out-board motor while removed from a boat,keep the outboard motor in the attitudeshown.

TIP:Place a towel or something similar under theoutboard motor to protect it from damage.EMU28242

Storing outboard motorWhen storing your Yamaha outboard motorfor prolonged periods of time (2 months orlonger), several important procedures mustbe performed to prevent excessive damage.It is advisable to have your outboard motorserviced by an authorized Yamaha dealerprior to storage. However, you, the owner,with a minimum of tools, can perform the fol-lowing procedures.

NOTICEECM01081

To prevent problems which can becaused by oil entering the cylinder fromthe sump, keep the outboard motor inthe attitude shown when transportingand storing it. If storing or transportingthe outboard motor on its side (not up-

1. Steering bracket2. Handgrip

ZMU05633

1

1

2

2

ZMU05634

ZMU05630



Maintenance

69

right), put it on a cushion after drainingthe engine oil.

Do not place the outboard motor on itsside before the cooling water hasdrained from it completely, otherwisewater may enter the cylinder throughthe exhaust port and cause engine trou-ble.

Store the outboard motor in a dry, well-ventilated place, not in direct sunlight.

EMU41382

Conditioning and stabilizing gasolineWhen preparing to store a boat for extendedperiods (2 months or longer) it is best to com-pletely remove all gasoline from the boat’sfuel tank(s). If it is not possible to remove thegasoline, add one ounce of “Yamalube FuelStabilizer & Conditioner Plus” to each gallonof gasoline in a full tank of gasoline to pro-vide fuel stability and corrosion protection.

TIP:Do not fill the fuel tank(s) to the point of over-flowing. Approximately 7/8 full will allowenough space in the fuel tank to prevent gas-oline purging from the fuel tank vent due toexpansion with temperature changes.Do not cap the fuel tank vent. Excessivepressure could damage the boat and motor’sfuel systems.A partially filled fuel tank, less than 7/8 fullbut not completely empty, is not recommend-ed. Air space above the gasoline allows airmovement which can bring in water throughcondensation as the air temperature chang-es.Condensation inside the fuel tank can causecorrosion problems and phase separation ofgasoline containing ethanol.Consult your Yamaha dealer concerning pre-ventative measures that may work best forthe gasoline and environmental conditions in

your area.EMU28306

ProcedureEMU43333

Flushing in a test tank

NOTICEECM00302

Before starting the engine, make sure tosupply water to the cooling water passag-es. Otherwise, the engine could overheatand be damaged.

1. Dismount the outboard motor from theboat. For further details, see page 67.

2. Wash the outboard motor body usingfresh water. NOTICE: Do not spray wa-ter into the air intake. [ECM01841] For fur-ther information, see page 71.

3. Fill the fuel tank with fresh fuel and addone ounce of “Yamaha Fuel Conditionerand Stabilizer” to each gallon of fuel.

TIP:The use of “Yamaha Fuel Conditioner andStabilizer” eliminates the need to drain thefuel system. Consult your Yamaha dealer orother qualified mechanic if the fuel system isto be drained instead.4. Disconnect the fuel hose from the fuel

joint on the outboard motor.5. Remove the top cowling and silencer

cover (if equipped). Remove the propel-ler. For further details, see page 84.

6. Position the outboard motor on a watertank. For further details, see page 38.



Maintenance

70

7. Fill the tank with fresh water to above thelevel of the anti-cavitation plate.NOTICE: If the fresh water level is be-low the level of the anti-cavitationplate, or if the water supply is insuffi-cient, engine seizure may occur.[ECM00292]

8. Cooling system flushing is essential toprevent the cooling system from clog-ging up with salt, sand, or dirt. In addi-tion, fogging of the engine is mandatoryto prevent excessive engine damagedue to rust. Perform the flushing andfogging at the same time. WARNING!Do not touch or remove electricalparts when starting or during opera-tion. Keep hands, hair, and clothesaway from the flywheel and other ro-tating parts while the engine is run-ning. [EWM00092]

9. Run the engine at a fast idle for 10–15minutes in neutral position.

10. Just prior to turning off the engine, quick-ly spray “Yamaha Stor-Rite EngineFogging Oil” alternately into each carbu-retor or the fogging hole of the silencercover, if equipped. When properly done,the engine will smoke excessively and

almost stall.11. Remove the outboard motor from the

test tank. For further details, see page67.

12. Drain the cooling water completely out ofthe outboard motor. Clean the body thor-oughly.

13. Install the silencer cover/cap (ifequipped) and top cowling.

EMU41072

Lubrication1. Change the gear oil. For instructions,

see page 85. Check the gear oil for thepresence of water that indicates a leakyseal. Seal replacement should be per-formed by an authorized Yamaha dealerprior to use.

2. Lubricate all grease fittings. For furtherdetails, see page 77.

TIP:For long-term storage, fogging the enginewith fogging oil is recommended. Contactyour Yamaha dealer for information aboutfogging oil and procedures for your outboardmotor.EMU30269

Cleaning and anticorrosion measures1. Wash down the exterior of the outboard

motor with fresh water and dry off com-pletely. NOTICE: Do not spray waterinto the air intake. [ECM01841] For furtherinformation, see page 71.

2. Spray the outboard motor exterior with“Yamaha Silicone Protectant”. NOTICE:Do not spray when the engine is run-ning. Also, do not spray near the si-lencer or into the engine. Otherwisethe engine could be damaged. [ECM01403]

3. Wax the cowling with a non-abrasivewax such as “Yamalube Professional

1. Water surface2. Lowest water level

ZMU02051

1

2



Maintenance

71

Polish”.EMU28446

Flushing power unitPerform this procedure right after operationfor the most thorough flushing.

NOTICEECM01531

Do not perform this procedure while theengine is running. The water pump maybe damaged and severe damage fromoverheating can result.

1. After shutting off the engine, unscrewthe garden hose connector from the fit-ting on the bottom cowling.

2. Screw the garden hose adapter onto agarden hose, which is connected to afresh water supply, and then connect it

to the garden hose connector.3. With the engine off, turn on the water tap

and let the water flush through the cool-ing passages for about 15 minutes. Turnoff the water and disconnect the gardenhose adapter from the garden hose con-nector.

4. Reinstall the garden hose connectoronto the fitting on the bottom cowling.Tighten the connector securely.NOTICE: Do not leave the gardenhose connector loose on the bottomcowling fitting or let the hose hangfree during normal operation. Waterwill leak out of the connector insteadof cooling the engine, which cancause serious overheating. Be surethe connector is tightened securelyon the fitting after flushing the en-gine. [ECM00542]

TIP: When flushing the engine with the boat in

the water, tilting up the outboard motor un-til it is completely out of the water willachieve better results.

For cooling system flushing instructions,see page 67.

EMU44342

Cleaning the outboard motorWhen cleaning the outboard motor, the topcowling must be installed.1. Wash the exterior of the outboard motor

using fresh water. NOTICE: Do notspray water into the air intake. [ECM01841]

1. Fitting2. Garden hose connector3. Garden hose adapter

ZMU05556

1

32



Maintenance

72

2. Drain the cooling water completely out ofthe outboard motor. Clean the body thor-oughly.

EMU28463

Checking painted surface of outboard motorCheck the outboard motor for scratches,nicks, or flaking paint. Areas with damagedpaint are more likely to corrode. If necessary,clean and paint the areas. Touch-up paint isavailable from your Yamaha dealer.EMU37015

Periodic maintenance

WARNINGEWM01943

These procedures require mechanicalskills, tools, and supplies. If you do nothave the proper skills, tools, or suppliesto perform a maintenance procedure,have a Yamaha dealer or other qualifiedmechanic do the work.The procedures involve disassemblingthe motor and exposing dangerous parts.To reduce the risk of injury from moving,hot, or electrical parts: Turn off the engine and keep the key(s)

and engine shut-off cord (lanyard) withyou when you perform maintenance un-less otherwise specified.

The power tilt switch operate evenwhen the ignition key is off. Keep peo-ple away from the switches wheneverworking around the motor. When themotor is tilted, keep away from the areaunder it or between it and the clampbracket. Be sure no one is in this areabefore operating the power tilt mecha-nism.

Allow the engine to cool before han-dling hot parts or fluids.

Always completely reassemble the mo-tor before operation.

Maintenance, replacement, or repair ofthe emission control devices and sys-tems may be performed by any marineengine repair establishment or individual.All warranty repairs, however, includingthose to the emission control system,must be performed by an authorizedYamaha marine dealership.A service manual is available for purchasethrough your Yamaha dealer for owners whohave the mechanical skills, tools, and otherequipment necessary to perform mainte-nance not covered by this owner’s manual.EMU28512

Replacement partsIf replacement parts are necessary, use onlygenuine Yamaha parts or parts of equivalentdesign and quality. Any part of inferior qualitymay malfunction, and the resulting loss ofcontrol could endanger the operator andpassengers. Yamaha genuine parts and ac-cessories are available from your Yamahadealer.EMU35522

Maintenance interval guidelinesThe service intervals provided in the Mainte-nance Chart were developed based upon“typical” use that includes operating at varied

1. Air intake

1

ZMU07873



Maintenance

73

speeds, with sufficient time for engine warmup and cool-down, a medium to light load,and an average cruising speed near the3000 to 4000 rpm range. As with any engine,however, if your normal operating conditionsare different, you should consider servicemore often than shown, especially how oftenyou change your engine oil and gear oil. Ex-amples might include extended wide-open-throttle use or long periods of trolling oridling, carrying heavy loads, or frequentstarting and stopping or shifting. More fre-quent maintenance will often pay off manytimes over in increased engine life and great-er owner satisfaction. Consult your Yamahadealer for additional maintenance recom-mendations.



Maintenance

74

EMU46073

Maintenance chart 1TIP: Refer to the sections in this chapter for explanations of each owner-specific action. The maintenance cycle on these charts assume usage of 100 hours per year and regular

flushing of the cooling water passages. Maintenance frequency should be adjusted whenoperating the engine under adverse conditions such as extended trolling.

Disassembly or repairs may be necessary depending on the outcome of maintenancechecks.

Expendable or consumable parts and lubricants will lose their effectiveness over time andthrough normal usage regardless of the warranty period.

When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine shouldbe flushed with clean water after each use.

The “ ” symbol indicates the check-ups which you may carry out yourself.The “ ” symbol indicates work to be carried out by your Yamaha dealer.

Item Actions

Initial Every

Page20 hours (3 months)

100 hours (1 year)

300 hours (3 years)

500 hours (5 years)

Anode(s) (external)Inspection or replacement as necessary

86

Anode(s) (internal) *1

Inspection or replacement as necessary

—

Anode(s) (internal) *2

Replacement —

Battery (electro-lyte level, terminal)

Inspection 87

Battery (electro-lyte level, terminal)

Fill, charging or replacing as nec-essary

—

Cooling water leak-age


—

Cowling lock lever Inspection 42, 44

Engine starting condition/noise

Inspection 47

Engine idle speed/noise

Inspection 79

Engine oil Replacement 80

Engine oil filter (cartridge)

Replacement 82



Maintenance

75

Fuel filter (can be disassembled)


42

Fuel line Inspection —

Fuel lineInspection or replacement as necessary

—

Fuel pump Inspection or replacement as necessary

—

Fuel/engine oil leakage

Inspection —

Gear oil Replacement 85

Greasing points Greasing 77

Clamp bracket bolt (through tube)

Inspection and greasing

—

Impeller/water pump housing


—

Impeller/water pump housing

Replacement —

Power tilt unit Inspection 44

Propeller/propeller nut/cotter pin


83

Shift link/shift cableInspection, adjust-ment or replace-ment as necessary

—

Spark plug(s)Inspection or replacement as necessary

78

Spark plug caps/spark plug wires


—

Water from the cooling water pilot hole

Inspection 53

Throttle link/throt-tle cable

Inspection, adjust-ment or replace-ment as necessary

—

Item Actions

Initial Every


100 hours (1 year)

300 hours (3 years)

500 hours (5 years)



Maintenance

76

EMU46230

*1 cylinder head, thermostat cover*2 exhaust cover, cooling water passage cover, Rectifier Regulator coverEMU46082

Maintenance chart 2

ThermostatInspection or replacement as necessary

—

Timing beltInspection or replacement as necessary

—

Valve clearanceInspection and adjustment

—

Cooling water inlet Inspection 24

Main switch/stop switch


—

Wire harness con-nections/wire cou-pler connections


—

Fuel tank (Yamaha portable tank)

Inspection and cleaning as neces-sary

—

Item ActionsEvery

Page1000 hours

Exhaust guide/exhaust manifold


—

Timing belt Replacement —

Item Actions

Initial Every


100 hours (1 year)

300 hours (3 years)

500 hours (5 years)



Maintenance

77

EMU41303

GreasingYamalube Marine GreaseF15EHA, F15MHA, F15PHA, F20EHA, F20MHA, F20PHA

ZMU05557



Maintenance

78

F20EA, F20PA

EMU44851

Cleaning and adjusting spark plugThe spark plug is an important engine com-ponent and is easy to inspect. The conditionof the spark plug can indicate somethingabout the condition of the engine. For exam-ple, if the center electrode porcelain is verywhite, this could indicate an intake air leak orcarburetion problem in that cylinder. Do notattempt to diagnose any problems yourself.Instead, take the outboard motor to a

Yamaha dealer. You should periodically re-move and inspect the spark plug becauseheat and deposits will cause the spark plugto slowly break down and erode.1. Remove the spark plug caps from the

spark plugs.2. Remove the spark plug. If electrode ero-

sion becomes excessive, or if carbonand other deposits are excessive, youshould replace the spark plug with an-other of the correct type. WARNING!

ZMU05595



Maintenance

79

When removing or installing a sparkplug, be careful not to damage the in-sulator. A damaged insulator couldallow external sparks, which couldlead to explosion or fire. [EWM00562]

3. Be sure to use the specified spark plug,otherwise the engine may not operateproperly. Before fitting the spark plug,measure the electrode gap with a wirethickness gauge; replace it if out of spec-ification.

4. When fitting the plug, wipe off any dirtfrom the threads, and then screw it in tothe correct torque.

TIP:If a torque-wrench is not available when youare reinstalling a spark plug, a good estimateof the correct torque is 1/12 turn past finger-

tight. When you are installing a new sparkplug, a good estimate of the correct torque is1/2 turn past finger-tight.EMU37451

Checking fuel filterCheck the fuel filter periodically. If any wateror foreign matter is found in the filter, clean orreplace it. For cleaning or replacement of thefuel filter, consult your Yamaha dealer.

EMU29045

Inspecting idle speed

WARNINGEWM00452

Do not touch or remove electrical partswhen starting or during operation.

Keep hands, hair, and clothes awayfrom the flywheel and other rotatingparts while the engine is running.

NOTICEECM00491

This procedure must be performed whilethe outboard motor is in the water. Aflushing attachment or test tank can beused.

If the boat is not equipped with a tachometerfor the outboard motor, use a diagnostic ta-chometer for this procedure. Results mayvary depending on whether testing is con-ducted with the flushing attachment, in a testtank, or with the outboard motor in the water.1. Start the engine and allow it to warm up

Standard spark plug:DPR6EB-9

1. Spark plug gap2. Spark plug part number3. Spark plug I.D. mark (NGK)

Spark plug gap:0.8–0.9 mm (0.031–0.035 in)

Spark plug torque:17 N·m (1.7 kgf·m, 13 lb·ft)

ZMU06169



Maintenance

80

fully in neutral until it is running smooth-ly.

2. Once the engine has warmed up, verifywhether the idle speed is set to specifi-cation. For idle speed specifications, seepage 15. If you have difficulty verifyingthe idle speed, or the idle speed requiresadjustment, consult a Yamaha dealer orother qualified mechanic.

EMU38808

Changing engine oil

WARNINGEWM00761

Avoid draining the engine oil immedi-ately after stopping the engine. The oilis hot and should be handled with careto avoid burns.

Be sure the outboard motor is securelyfastened to the transom or a stablestand.

NOTICEECM01711

Change the engine oil after the first 20hours of operation or 3 months, and ev-ery 100 hours or at 1-year intervals there-after. Otherwise the engine will wearquickly.

To prevent spilling oil where it could causedamage to nature, it is strongly recommend-ed that you use an oil changer to change theengine oil. If an oil changer is not available,drain the engine oil by removing the drainscrew. If you are not familiar with the proce-dure for changing the engine oil, consult yourYamaha dealer.1. Put the outboard motor in an upright po-

sition (not tilted). NOTICE: If the out-board motor is not level, the oil levelindicated on the oil dipstick may notbe accurate. [ECM01862]

2. Start the engine. Warm it up and keepthe idle speed for 5-10 minutes.

3. Stop the engine and leave it for 5-10minutes.

4. Remove the top cowling.5. Remove the oil filler cap. Pull out the dip-

stick and use the oil changer to extractthe oil completely.

TIP:When using an oil changer, skip steps 6 and7.6. Prepare a suitable container that holds a

larger amount than the engine oil capac-ity. Remove the drain screw and gasketwhile holding the container under thedrain hole. Let the oil drain completely.Wipe up any spilled oil immediately.

1. Oil changer

ZMU05554

1 ZMU06617



Maintenance

81

TIP:If the oil does not drain easily, change the tiltangle or turn the outboard motor to port andstarboard to drain the oil.7. Put a new gasket on the oil drain screw.

Apply a light coat of oil to the gasket andinstall the drain screw.

TIP:If a torque wrench is not available when youare installing the drain screw, finger tightenthe screw just until the gasket comes intocontact with the surface of the drain hole.Then tighten 1/4 to 1/2 turn more. Tightenthe drain screw to the correct torque with atorque wrench as soon as possible.8. Add the correct amount of oil through the

filler hole. Put back the filler cap and thedipstick. NOTICE: Overfilling the oilcould cause leakage or damage. If theoil level is above the upper levelmark, drain until the level meets thespecified capacity. [ECM01851]

9. Leave the outboard motor for 5-10 min-utes.

10. Remove the oil dipstick and wipe itclean.

11. Insert the dipstick and remove it again.Be sure to completely insert the dipstickinto the dipstick guide, otherwise the oillevel measurement will be incorrect.

12. Recheck the oil level using the dipstickto be sure the level falls between the up-per and lower marks. Consult yourYamaha dealer if the oil level is out ofspecified level.

1. Drain screw2. Gasket

Drain screw tightening torque:27 N·m (2.7 kgf·m, 20 lb·ft)

1

2

ZMU05561

1. Oil filler cap

Recommended engine oil:YAMALUBE 4M FC-W or 4-stroke out-board motor oil

Engine oil quantity (without oil filter replacement):

1.6 L (1.69 US qt, 1.41 Imp.qt)Engine oil quantity (with oil filter re-placement):

1.8 L (1.90 US qt, 1.58 Imp.qt)

ZMU05562

1



Maintenance

82

13. Start the engine and make sure that thelow oil pressure-alert indicator remainsoff. Also, make sure that there are no oilleaks. NOTICE: If the low oil pressure-alert indicator comes on or if thereare oil leaks, stop the engine and findthe cause. Continued operation witha problem could cause severe enginedamage. Consult your Yamaha dealerif the problem cannot be located andcorrected. [ECM01623]

14. Install the top cowling.15. Dispose of used oil according to local

regulations.

TIP: For more information on the disposal of

used oil, consult your Yamaha dealer. Change the oil more often when operating

the engine under adverse conditions suchas extended trolling.

EMU48110

Replacing the engine oil filter

WARNINGEWM00761

Avoid draining the engine oil immedi-ately after stopping the engine. The oilis hot and should be handled with care

to avoid burns. Be sure the outboard motor is securely

fastened to the transom or a stablestand.

Yamaha recommends you to have aYamaha dealer replace the engine oil filter.If you perform replacement yourself, followthe procedure below. If you have any ques-tions, please consult a Yamaha dealer.1. Drain the engine oil. For further informa-

tion, see page 80.2. Place a cloth under the engine oil filter.3. Turn the engine oil filter counterclock-

wise and remove it.

TIP: Wipe up any spilled engine oil. Dispose of the removed engine oil filter in

accordance with local regulations.4. Apply engine oil to the O-ring of the en-

gine oil filter.

1. Lower mark2. Oil dipstick3. Upper mark

2

1

3

ZMU08041



Maintenance

83

5. Turn the engine oil filter clockwise andtighten it to the specified torque.

6. Fill up the engine with engine oil. For fur-ther information, see page 80.

EMU48060

Why YamalubeYAMALUBE oil is a Genuine YAMAHA Partborn of the engineers’ passion and belief thatengine oil is an important liquid engine com-ponent. We form teams of specialists in thefields of mechanical engineering, chemistry,electronics and track testing, and have themdevelop the engine together with the oil it willuse. Yamalube oils take full advantage of thebase oil’s qualities and blend in the ideal bal-

ance of additives to make sure the final oilclears our performance standards. Thus, Ya-malube mineral, semisynthetic and syntheticoils have their own distinct characters andvalue. Yamaha’s experience gained overmany years of research and developmentinto oil since the 1960’s helps make Yama-lube the best choice for your Yamaha en-gine.

EMU29116

Inspecting wiring and connectors Inspect that each connector is engaged

securely. Inspect that each ground lead is properly

secured.

EMU32113

Checking propeller

WARNINGEWM01882

You could be seriously injured if the en-gine accidentally starts when you arenear the propeller. Before inspecting, re-moving, or installing the propeller, placethe shift control in neutral, turn the main

1. O-ring

Engine oil filter:18 N·m (1.8 kgf·m, 13 lb·ft)

1

ZMU02087



Maintenance

84

switch to “ ” (off) and remove the key,and remove the clip from the engine shut-off switch. Turn off the battery cut-offswitch if your boat has one.

Do not use your hand to hold the propellerwhen loosening or tightening the propellernut. Put a wood block between the anti-cavi-tation plate and the propeller to prevent thepropeller from turning.

Checkpoints Check each of the propeller blades for ero-

sion from cavitation or ventilation, or otherdamage.

Check the propeller shaft for damage. Check the splines for wear or damage. Check for fish line tangled around the pro-

peller shaft.

Check the propeller shaft oil seal for dam-age.

EMU30663

Removing propellerEMU29198

Spline models1. Straighten the cotter pin and pull it out

using a pair of pliers.2. Remove the propeller nut, washer, and

spacer (if equipped). WARNING! Donot use your hand to hold the propel-ler when loosening the propeller nut.[EWM01891]

3. Remove the propeller, washer (ifequipped), and thrust washer.

EMU30673

Installing propellerEMU46121

Spline models

NOTICEECM00502

Make sure to use a new cotter pin andbend the ends over securely. Otherwise,the propeller could come off during oper-ation and be lost.

1. Apply Yamalube Marine Grease or acorrosion resistant grease to the propel-ler shaft.

ZMU01897

1. Cotter pin2. Propeller nut3. Washer4. Propeller5. Thrust washer

1

ZMU02062

23

45



Maintenance

85

2. Install the spacer (if equipped), thrustwasher, washer (if equipped), and pro-peller on the propeller shaft. NOTICE:Make sure to install the thrust washerbefore installing the propeller. Other-wise, the lower case and propellerboss could be damaged. [ECM01882]

3. Install the spacer (if equipped) and thewasher. Tighten the propeller nut to thespecified torque.

4. Align the propeller nut slot with the pro-peller shaft hole. Insert a new cotter pinin the hole and bend the cotter pin ends.NOTICE: Do not reuse the cotter pin.Otherwise, the propeller can come offduring operation. [ECM01892]

TIP:If the propeller nut slot does not align with thepropeller shaft hole after tightening the pro-peller nut to the specified torque, tighten thenut further to align the slot with the hole.EMU47070

Changing gear oil

WARNINGEWM00801

Be sure the outboard motor is securelyfastened to the transom or a stablestand. You could be severely injured ifthe outboard motor falls on you.

Never get under the lower unit while itis tilted, even when the tilt support leveror knob is locked. Severe injury couldoccur if the outboard motor accidental-ly falls.

1. Tilt the outboard motor so that the gearoil drain screw is at the lowest point pos-sible.

2. Place a suitable container under thegear case.

3. Remove the gear oil drain screw andgasket. NOTICE: If there is an exces-sive quantity of metal particles on themagnetic gear oil drain screw, thiscan indicate lower unit problem. Con-sult your Yamaha dealer. [ECM01901]

1. Cotter pin2. Propeller nut3. Washer4. Propeller5. Thrust washer

Propeller nut tightening torque:17 N·m (1.7 kgf·m, 13 lb·ft)

1

23

45

ZMU08161

ZMU02063



Maintenance

86

TIP: If a magnetic gear oil drain screw is

equipped, remove all metal particles fromthe screw before installing it.

Always use new gaskets. Do not reuse theremoved gaskets.

4. Remove the oil level plug and gasket toallow the oil to drain completely.NOTICE: Check the used gear oil afterit has been drained. If the gear oil ismilky or contains water or a largeamount of metal particles, the gearcase may be damaged. Have aYamaha dealer check and repair theoutboard motor. [ECM00714]

TIP:For disposal of used oil, consult yourYamaha dealer.5. Put the outboard motor in a vertical posi-

tion. Using a flexible or pressurized fill-ing device, inject the gear oil into thegear oil drain screw hole.

6. Put a new gasket on the oil level plug.When the oil begins to flow out of the oillevel plug hole, insert and tighten the oillevel plug.

TIP:Apply a light coat of gear oil to the oil levelplug thread and gasket before installation.

7. Put a new gasket on the gear oil drainscrew. Insert and tighten the gear oildrain screw.

TIP:Apply a light coat of gear oil to the gear oildrain screw thread and gasket before instal-lation.

EMU29318

Inspecting and replacing anode(s)Yamaha outboard motors are protected from

1. Gear oil drain screw2. Oil level plug

ZMU023231

2

Recommended gear oil:Yamalube Marine Gearcase Lube or Hypoid gear oil

Recommended gear oil grade:SAE 90 API GL-4

Gear oil quantity:0.250 L (0.264 US qt, 0.220 Imp.qt)

Tightening torque:7 N·m (0.7 kgf·m, 5.2 lb·ft)

Tightening torque:7 N·m (0.7 kgf·m, 5.2 lb·ft)

ZMU02065



Maintenance

87

corrosion by sacrificial anodes. Inspect theexternal anodes periodically. Remove scalesfrom the surfaces of the anodes. Consult aYamaha dealer for replacement of externalanodes.

NOTICEECM00721

Do not paint anodes, as this would renderthem ineffective.

TIP:Inspect ground leads attached to externalanodes on equipped models. Consult aYamaha dealer for inspection and replace-ment of internal anodes attached to the pow-er unit.

EMU29324

Checking battery (for electric start models)

WARNINGEWM01903

Battery electrolyte is poisonous andcaustic, and batteries generate explosivehydrogen gas. When working near thebattery: Wear protective eye gear and rubber

gloves. Do not smoke or bring any other source

of ignition near the battery.

The procedure for checking the battery var-ies for different batteries. This procedurecontains typical checks that apply to manybatteries, but you should always refer to thebattery manufacturer’s instructions.

NOTICEECM01921

A poorly maintained battery will quicklydeteriorate.

1. Check the electrolyte level.

2. Check the battery’s charge. If your boatis equipped with the digital speedome-ter, the voltmeter and low battery alertfunctions will help you monitor the bat-tery’s charge. If the battery needs charg-ing, consult your Yamaha dealer.

3. Check the battery connections. They

ZMU05564



Maintenance

88

should be clean, secure, and covered byan insulating cover. WARNING! Badconnections can produce shorting orarcing and cause an explosion.[EWM01913]

EMU29335

Connecting the battery

WARNINGEWM00573

Mount the battery holder securely in adry, well-ventilated, vibration-free loca-tion in the boat. Install a fully charged bat-tery in the holder.

NOTICEECM01125

Do not reverse the battery cables. Other-wise, the electrical parts could be dam-aged.

1. Make sure the main switch (on applica-ble models) is “ ” (off) before workingon the battery.

2. Connect the red battery cable to thePOSITIVE (+) terminal first. Then con-nect the black battery cable to the NEG-ATIVE (-) terminal.

3. The electrical contacts of the battery andcables must be clean and properly con-

nected, or the battery will not start theengine.

EMU29372

Disconnecting the battery1. Turn off the battery cut-off switch (if

equipped) and main switch. NOTICE: Ifthey are left on, the electrical systemcan be damaged. [ECM01931]

2. Disconnect the negative cable(s) fromthe negative (-) terminal. NOTICE: Al-ways disconnect all negative (-) ca-bles first to avoid a short circuit anddamage to the electrical system.[ECM01941]

3. Disconnect the positive cable(s) and re-move the battery from the boat.

4. Clean, maintain, and store the batteryaccording to the manufacturer’s instruc-tions.

1. Red cable2. Black cable3. Battery

ZMU01811

1

23



89

Trouble RecoveryEMU29428

TroubleshootingA problem in the fuel, compression, or igni-tion systems can cause poor starting, loss ofpower, or other problems. This section de-scribes basic checks and possible remedies,and covers all Yamaha outboard motors.Therefore some items may not apply to yourmodel.If your outboard motor requires repair, bringit to your Yamaha dealer.If the engine trouble-alert indicator is flash-ing, consult your Yamaha dealer.

Starter will not operate.Q. Is battery capacity weak or low?A. Check battery condition. Use battery ofrecommended capacity.

Q. Are battery connections loose or corrod-ed?A. Tighten battery cables and clean batteryterminals.

Q. Is fuse for electric start relay or electric cir-cuit blown?A. Check for cause of electric overload andrepair. Replace fuse with one of correct am-perage.

Q. Are starter components faulty?A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear?A. Shift to neutral.

Engine will not start (starter operates).Q. Is fuel tank empty?A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?A. Clean or replace filter.

Q. Is starting procedure incorrect?A. See page 49.

Q. Has fuel pump malfunctioned?A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.

Q. Are spark plug cap(s) fitted incorrectly?A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.

Q. Are ignition parts faulty?A. Have serviced by a Yamaha dealer.

Q. Is engine shut-off cord (lanyard) not at-tached?A. Attach cord.

Q. Are engine inner parts damaged?A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.



Trouble Recovery

90

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.

Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.


Q. Have ignition parts failed?A. Have serviced by a Yamaha dealer.

Q. Has alert system activated?A. Find and correct cause of alert.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Is specified engine oil not being used?A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect?A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed?A. Open air vent screw.

Q. Is choke knob pulled out?

A. Return to home position.

Q. Is motor angle too high?A. Return to normal operating position.

Q. Is carburetor clogged?A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is throttle valve adjustment incorrect?A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected?A. Connect securely.

Alert buzzer sounds or indicator lights.Q. Is cooling system clogged?A. Check water intake for restriction.

Q. Is engine oil level low?A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorat-ed?A. Replace oil with fresh, specified type.

Q. Is oil filter clogged?A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunc-tioned?A. Have serviced by a Yamaha dealer.



Trouble Recovery

91

Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.

Q. Is water pump or thermostat faulty?A. Have serviced by a Yamaha dealer.

Q. Is there excess water in fuel filter cup?A. Drain filter cup.

Engine power loss.Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect?A. Install correct propeller to operate out-board at its recommended speed (r/min)range.

Q. Is trim angle incorrect?A. Adjust trim angle to achieve most efficientoperation.

Q. Is motor mounted at incorrect height ontransom?A. Have motor adjusted to proper transomheight.

Q. Has alert system activated?A. Find and correct cause of alert.

Q. Is boat bottom fouled with marine growth?A. Clean boat bottom.

Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.

Q. Are weeds or other foreign matter tangled

on gear housing?A. Remove foreign matter and clean lowerunit.

Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.


Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.

Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.


Q. Have electrical parts failed?A. Have serviced by a Yamaha dealer.

Q. Is specified fuel not being used?A. Replace fuel with specified type.

Q. Is specified engine oil not being used?A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.

Q. Is air vent screw closed?A. Open the air vent screw.

Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.



Trouble Recovery

92

Q. Is fuel joint connection incorrect?A. Connect correctly.

Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.

Q. Is high pressure fuel pump drive belt bro-ken?A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shiftlever position?A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.Q. Is propeller damaged?A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged?A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangledon propeller?A. Remove and clean propeller.

Q. Is motor mounting bolt loose?A. Tighten bolt.

Q. Is steering pivot loose or damaged?A. Tighten or have serviced by a Yamahadealer.EMU29435

Temporary action in emergency

EMU29442

Impact damage

WARNINGEWM00871

The outboard motor can be seriouslydamaged by a collision while operating or

trailering. Damage could make the out-board motor unsafe to operate.

If the outboard motor hits an object in the wa-ter, follow the procedure below.

1. Stop the engine immediately.2. Check the control system and all compo-

nents for damage. Also, check the boatfor damage.

3. Whether damage is found or not, returnto the nearest harbor slowly and careful-ly.

4. Have a Yamaha dealer check the out-board motor before operating it again.

EMU30684

Replacing fuseIf a fuse has blown, open the fuse holder andremove the fuse with a fuse puller. Replaceit with a spare one of the proper amperage.

WARNINGEWM00632

Substituting an incorrect fuse or a pieceof wire could allow excessive currentflow. This could cause electric systemdamage and a fire hazard.

Consult your Yamaha dealer if the new fuseimmediately blows again.



Trouble Recovery

93

EMU32131

Power tilt will not operateIf the engine cannot be tilted up or down withthe power tilt because of a discharged bat-tery or a failure with the power tilt unit, the en-gine can be tilted manually.1. Loosen the manual valve screw by turn-

ing it counterclockwise until it stops.

2. Put the engine in the desired position,then tighten the manual valve screw byturning it clockwise.

EMU29534

Starter will not operateIf the starter mechanism does not operate(the engine cannot be cranked with the start-er), the engine can be started with an emer-gency starter rope.

WARNINGEWM01023

Use this procedure only in an emergen-cy to return to the nearest port for re-pairs.

When the emergency starter rope isused to start the engine, the start-in-gear protection device does not oper-ate. Make sure the remote control leveris in neutral. Otherwise the boat couldunexpectedly start to move, whichcould result in an accident.

Attach the engine shut-off cord to a se-cure place on your clothing, or yourarm or leg while operating the boat.

Do not attach the cord to clothing thatcould tear loose. Do not route the cordwhere it could become entangled, pre-venting it from functioning.

Avoid accidentally pulling the cord dur-

1. Fuse puller2. Cap3. Fuse (20 A)4. Spare fuse (20 A)

1. Fuse puller

ZMU05565

1

23

4

1

ZMU04337

1. Manual valve screw



Trouble Recovery

94

ing normal operation. Loss of enginepower means the loss of most steeringcontrol. Also, without engine power,the boat could slow rapidly. This couldcause people and objects in the boat tobe thrown forward.

Make sure no one is standing behindyou when pulling the starter rope. Itcould whip behind you and injuresomeone.

An unguarded, rotating flywheel is verydangerous. Keep loose clothing andother objects away when starting theengine. Use the emergency starter ropeonly as instructed. Do not touch the fly-wheel or other moving parts when theengine is running. Do not install thestarter mechanism or top cowling afterthe engine is running.

Do not touch the ignition coil, sparkplug wire, spark plug cap, or other elec-trical components when starting or op-erating the motor. You could get anelectrical shock.

EMU31994

Emergency starting engine (manual starter model)1. Remove the top cowling.2. Remove the dust cover.

3. Disconnect the start-in-gear protectioncable from the starter, if equipped.

4. Remove the starter/flywheel cover afterremoving the bolt(s).

5. Prepare the engine for starting. For fur-ther information, see page 49. Be surethat the gear shift is in neutral and thatthe clip is attached to the engine shut-offswitch.

ZMU05611

ZMU05603

ZMU05604

ZMU05625



Trouble Recovery

95

6. Insert the knotted end of the emergencystarter rope into the notch in the flywheelrotor and wind the rope 1 or 2 turn(s)around the flywheel clockwise.

7. Pull the rope slowly until resistance isfelt. Give a strong pull straight out tocrank and start the engine. If the enginedoes not start on the first try, repeat theprocedure.

TIP: If the engine does not start on the first try,

repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asmall amount (between 1/8 and 1/4) andtry again. Also if the engine is warm andfails to start, open the throttle a sameamount and try to start the engine again. Ifthe engine still fails to start, see page 49.

Slowly return the throttle grip to the fullyclosed position so that the engine does notstall.

EMU32004

Emergency starting engine (electric start model)1. Remove the top cowling.2. Remove the dust cover.

3. Remove the electrical system cover byremoving its screw(s).

4. Remove the screw(s) from the plate, andpull it down.

ZMU02026

ZMU05533

N

ZMU05610

ZMU05611

ZMU05612



Trouble Recovery

96

5. Remove the starter/flywheel cover afterremoving the bolt(s).

6. Secure the electrical system plate bytightening the bolt(s), and fix the plate.

7. Prepare the engine for starting. For fur-ther information, see page 49. Be surethat the gear shift is in neutral and thatthe clip is attached to the engine shut-offswitch. The main switch must be “ ”(on), if equipped.

ZMU05613

ZMU05624

ZMU05614

ZMU05615

ZMU05616

N

ZMU01771



Trouble Recovery

97

8. Insert the knotted end of the emergency

starter rope into the notch in the flywheelrotor and wind the rope 1 or 2 turn(s)around the flywheel clockwise.

9. Pull the rope slowly until resistance isfelt. Give a strong pull straight out tocrank and start the engine. If the enginedoes not start on the first try, repeat theprocedure.

TIP: If the engine does not start on the first try,

repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asmall amount (between 1/8 and 1/4) andtry again. Also if the engine is warm andfails to start, open the throttle a sameamount and try to start the engine again. Ifthe engine still fails to start, see page 49.

Slowly return the throttle grip to the fullyclosed position so that the engine does notstall.

EMU33502

Treatment of submerged motorIf the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corrosion may begin almost immedi-ately. NOTICE: Do not attempt to run theoutboard motor until it has been com-pletely inspected. [ECM00402]

ZMU05533

N

ZMU01772

ZMU02026

ON STARTOFF

ZMU01906

ZMU05622



98

Consumer informationEMU29837

YAMAHA FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY

ZMU07048

Yamaha Motor Corporation, U.S.A. and Yamaha Motor Canada Ltd. (“Yamaha”) hereby warrant that new Yamaha four-stroke outboard motors will be free from defects in material and workmanship for the period of time stated herein, subject to certain stated limitations.

PERIOD OF WARRANTY. Any new Yamaha four-stroke outboard motor purchased from an authorized Yamaha dealer in the customer’s country of residence (United States or Canada) and registered with Yamaha will be warranted against defects in material or workmanship, subject to exclusions noted herein, for the following applicable period determined by type of use:

The second and third year of warranty (if applicable) shall be limited to covering the cost of parts and labor for major components only. The major components covered are:

WARRANTY REGISTRATION. To be eligible for warranty coverage, the outboard motor must be registered with Yamaha in the country of residence. Warranty registration can be accomplished by any authorized Yamaha Outboard Motor Dealer.

OBTAINING REPAIRS UNDER WARRANTY. During the period of warranty, any authorized Yamaha Outboard Motor Dealer in the country of residence will, free of charge, repair or replace, at Yamaha’s option, any parts adjudged defective by Yamaha due to faulty workmanship or material from the factory. All replaced parts will become the property of Yamaha. If the customer is temporarily using a U.S.-registered outboard motor in Canada, or a Canada-registered outboard motor in the United States, and it needs warranty repairs, the owner should contact a nearby authorized Yamaha Outboard Motor Dealer for assistance. The local dealer will contact Yamaha on the owner’s behalf so that needed repairs can be made as quickly as possible.

CUSTOMER’S RESPONSIBILITY. Under the terms of this warranty, the customer will be responsible for ensuring that the outboard motor is properly operated, maintained, and stored as specified in the applicable Owner’s Manual. The owner of the outboard motor shall give notice to an authorized Yamaha Outboard Motor Dealer of any and all apparent defects within ten (10) days of discovery and make the motor available at that time for inspection and repairs at the dealer’s place of business.

Replacement parts used in warranty repairs will be warranted for the balance of the applicable warranty period.

• Pleasure use – three (3) years from the date of purchase.

Power Unit Section• Power Head• Intake Manifold• Carburetor Assembly and its Related Components• Fuel Injection System and its Related Components• Fuel and Oil Pump Assemblies• Ignition System (Standard and Microcomputer)Lower Unit Section Bracket Section• Exhaust System• Bracket System• Upper Casing• Power Trim and Tilt Assembly• Lower Unit Assembly

• Commercial application – one (1) year from the date of purchase. A commercial application is defined as any use of the outboard motor to generate income (excluding tournament fishing) or support business operations in any way during the warranty period, without regard to the type or percentage of commercial use. Yamaha reserves the right to modify incorrect registration data and reduce the warranty period to reflect commercial use.

• Yamaha peripheral equipment included with the motor, such as gauges, fuel tanks, and hoses, remote control boxes, and wiring external from the motor unit, will be warranted for one (1) year from the date of purchase for either pleasure or commercial use.



Consumer information

99

ZMU07047

SPECIFIC PARTS EXCLUDED FROM WARRANTY. Parts replaced due to normal wear or routine maintenance such as oil, spark plugs, shear pins, propellers, hubs, fuel and oil filters, brushes for the starter motor and power tilt motor, water pump impellers, and anodes, are not covered by warranty. Charges for removal of the motor from a boat and transporting the motor to and from an authorized Yamaha Outboard Motor Dealer are excluded from warranty coverage.

EMISSION CONTROL WARRANTY (United States only). Yamaha warrants to the ultimate purchaser and any subsequent owner, that the emission control components on this engine are designed, built and equipped so as to conform at the time of sale with applicable regulations under section 213 of the Clean Air Act and that this engine is covered against defects in materials and workmanship which cause said engine to fail to conform with applicable exhaust emission regulations for five (5) years from the date of purchase or 175 hours of operation, whichever comes first. Evaporative components (e.g., hoses, fuel tank, fuel cap) are two (2) years from the date of purchase. Some states have different emission control warranty provisions. As these vary from state to state, consult your Yamaha dealer or contact Yamaha Customer Relations at 1-866-894-1626 for more information.

TRANSFER OF WARRANTY Transfer of the warranty from the original purchaser to any subsequent purchaser is possible by having the motor inspected by an authorized Yamaha Outboard Motor Dealer and requesting the dealer to submit a change of registration to Yamaha within ten (10) days of the transfer.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE/PROVINCE TO PROVINCE.

YAMAHA MAKES NO OTHER WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH EXCEED THE OBLIGATIONS AND TIME LIMITS STATED IN THIS WARRANTY ARE HEREBY DISCLAIMED BY YAMAHA AND EXCLUDED FROM THIS WARRANTY. SOME STATES/PROVINCES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU. ALSO EXCLUDED FROM THIS WARRANTY ARE ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDING LOSS OF USE. SOME STATES/PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE EXCLUSION MAY NOT APPLY TO YOU.

GENERAL EXCLUSIONS FROM WARRANTY. This warranty will not cover the repair of damage if the damage is a result of abuse or neglect of the product. Examples of abuse and neglect include, but are not limited to:1. Racing or competition use, modification of original parts, abnormal strain.2. Lack of proper maintenance and off season storage as described in the Owner’s Manual; installation of parts or accessories that are

not equivalent in design and quality to genuine Yamaha parts.3. Operation of the motor at an rpm other than specified, use of lubricants or oils that are not suitable for outboard motor use.4. Damage as a result of accidents, collisions, contact with foreign materials, or submersion.5. Growth of marine organism on motor surfaces.6. Normal deterioration.

Specific parts excluded from the second and third year of warranty (if applicable) are:• Top and Bottom Cowling• Electric Components (other than ignition system)• Rubber Components (such as hoses, tubes, rubber seals, fittings, and clamps)



Consumer information

100

EMU29846

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE U.S.A. OR CANADA

Welcome to the Yamaha Family!

Congratulations on the purchase of your new Yamaha products. Yamaha is commit-ted to exceptional customer satisfaction and we want your ownership experience to be a satisfying one. Please read the following warranty information to help ensure satisfaction with your Yamaha.

This model was manufactured with specifications appropriate for sale and use in the U.S.A. and Canada. Please note the following information:

Your Yamaha model may not be sold in some countries. Therefore, a Yamaha dealer outside the United States or Canada may not have all of the replacement parts or technical information available to provide proper service. This may unavoidably delay repairs. Thank you for your understanding should this happen.

TIP:

1. As explained in the Limited Warranty Statement, the Yamaha warranty covers your Yamaha when it is registered and used in your country of residence. If you are temporarily using a U.S.-registered outboard motor in Canada, or a Canada-registered outboard motor in the United States, and it needs warranty repairs, you should contact a nearby authorized Yamaha Outboard Motor Dealer for assistance. The local dealer will contact Yamaha on the owner’s behalf so that needed repairs can be made as quickly as possible.

2. If you need repairs while temporarily using your Yamaha in another country, contact the local authorized Yamaha distributor for that country. Yamaha will work with that distributor to make the needed repairs as quickly as possible. If you have to pay for a repair that you believe your warranty would have covered at home, present all repair orders, receipts, or other related documents to your local dealer when you return home. He will be able to contact Yamaha on your behalf to see if any refund can be provided.

3. If your Yamaha is registered or used primarily outside the United States or Canada, the warranty printed in this manual does not apply to you. Contact the dealer who sold the Yamaha marine power unit to you for customer support information.

ZMU05199



101

INDEXA

Accident reporting................................... 4Alcohol and drugs ................................... 2Alert indicator........................................ 34Alert system.......................................... 36Anode(s), inspecting and replacing ...... 86Anti-fouling paint ................................... 21Approval label of emission control

certificate ............................................ 22Avoid collisions ....................................... 3

BBasic boating rules (Rules of the road)... 5Battery .................................................. 45Battery, checking (electric start

models)............................................... 87Battery, connecting ............................... 88Battery, disconnecting .......................... 88Battery requirements ............................ 17Boat education and training .................... 4Boat horsepower rating......................... 16Boating organizations ............................. 4Boating safety ......................................... 2Boating safety publications ..................... 4Breaking in engine ................................ 41

CCarbon monoxide ................................... 2Checks after engine warm up ............... 54Checks after starting engine ................. 53Checks before starting engine .............. 41Clamping the outboard motor ............... 40Cleaning and anticorrosion

measures............................................ 70Cleaning the outboard motor ................ 71Collisions with floating or submerged

objects .................................................. 3Compliance mark label ......................... 10Components diagram ........................... 24Control functions, checking................... 42Cooling water........................................ 53Cowling lock lever................................. 34Cruising in salt water or other

conditions ........................................... 66

DDismounting the outboard motor .......... 67

EElectric shock.......................................... 1Emergency equipment .......................... 21Emergency starting engine (electric

start model)......................................... 95Emergency starting engine (manual

starter model) ..................................... 94Emergency, temporary action in ........... 92Emission control information................. 22Engine, checking .................................. 43Engine oil .............................................. 43Engine oil, changing ............................. 80Engine oil, filling.................................... 41Engine oil requirements ........................ 18Engine shut-off cord (lanyard) .......... 1, 43Engine shut-off cord (lanyard) and

clip ...................................................... 29Engine stop button................................ 29

FFilling fuel.............................................. 45First-time operation............................... 41Flushing device............................... 34, 44Flushing in a test tank........................... 69Flushing power unit............................... 71Fuel filter, checking......................... 42, 79Fuel leaks, checking for ........................ 42Fuel level .............................................. 42Fuel requirements................................. 19Fuel system .......................................... 42Fuel tank ............................................... 25Fuse, replacing ..................................... 92

GGasoline............................................ 1, 19Gasoline Additives ................................ 20Gasoline exposure and spills .................. 2Gear oil, changing................................. 85Gear shift lever ..................................... 27Greasing ............................................... 77



INDEX

102

HHot parts ................................................. 1

IIdentification numbers record ............... 10Idle speed, inspecting ........................... 79Impact damage ..................................... 92Installation requirements....................... 16Instruments and indicators.................... 35

KKey number .......................................... 10

LLaws and regulations.............................. 4Low oil pressure alert............................ 36Low oil pressure-alert indicator............. 35Lubrication ............................................ 70

MMain switch ........................................... 30Maintenance chart 1 ............................. 74Maintenance chart 2 ............................. 76Maintenance interval guidelines ........... 72Manual starter handle ........................... 30Modifications........................................... 2Mounting height .................................... 39Mounting outboard motor...................... 16Mounting the outboard motor................ 38Muddy or acidic water........................... 21

NNeutral interlock trigger......................... 27Neutral throttle lever ............................. 27

OOperating engine .................................. 47Outboard motor disposal

requirements ...................................... 21Outboard motor (painted surface),

checking ............................................. 72Outboard motor safety ............................ 1Outboard motor serial number.............. 10Overheat alert ....................................... 36

Overheat-alert indicator ........................ 35Overloading ............................................ 2

PPassengers............................................. 2Passenger training.................................. 4People in the water ................................. 2Periodic maintenance ........................... 72Personal flotation devices (PFDs) .......... 2Power tilt ................................................. 1Power tilt switch .................................... 30Power tilt system, checking .................. 44Power tilt unit ........................................ 33Power tilt will not operate...................... 93Propeller ................................................. 1Propeller, checking ............................... 83Propeller, installing ............................... 84Propeller, removing............................... 84Propeller selection ................................ 18

RRead manuals and labels ..................... 12Remote control box............................... 26Remote control lever............................. 26Remote control requirements ............... 17Replacement parts................................ 72Replacing the engine oil filter................ 82Rotating parts ......................................... 1Rules when encountering vessels .......... 6

SSending fuel (portable tank).................. 47Shallow water ....................................... 63Shifting.................................................. 54Shifting (checks after engine warm

up) ...................................................... 54Spark plug, cleaning and adjusting....... 78Specifications........................................ 15Star labels............................................. 22Starter button ........................................ 30Starter will not operate.......................... 93Start-in-gear protection ......................... 18Starting engine...................................... 49



INDEX

103

Steering and sailing rules and sound signals .................................................. 5

Steering friction adjuster ....................... 31Stopping boat........................................ 56Stopping engine.................................... 56Stop switches........................................ 54Storing outboard motor ......................... 68Submerged outboard motor.................. 97

TThrottle friction adjuster ........................ 28Throttle grip........................................... 28Throttle indicator ................................... 28Tiller handle .......................................... 27Tilting up and down............................... 60Tilt lock mechanism .............................. 32Tilt support bar...................................... 33Tilt support knob ................................... 33To install the battery ............................. 17Top cowling, installing........................... 44Top cowling, removing.......................... 42Transporting and storing outboard

motor .................................................. 67Trimming outboard motor ..................... 57Trim rod (tilt pin).................................... 32Trim tab................................................. 32Troubleshooting .................................... 89

WWarming up engine............................... 54Warning labels ...................................... 12Warranty information (use outside the

U.S.A. or Canada) ............................ 100Warranty, limited................................... 98Weather .................................................. 3Wiring and connectors, inspecting........ 83

YYamalube.............................................. 83



EMU43024

For your best ownership experience, think Genuine Yamaha!

Genuine Yamaha Parts — Genuine Yamaha replacement parts are the exact same partsas the ones originally equipped on your vehicle, providing you with the performance and du-rability you have come to expect. Why settle for aftermarket parts that may not provide fullconfidence and satisfaction?

Genuine Yamaha Accessories — Yamaha only offers accessories that meet our high stan-dards for quality and performance. Buy with confidence, knowing your Genuine Yamaha Ac-cessories will fit right and perform right — right out of the box.

Yamalube — Take care of your Yamaha with legendary Yamalube oils, lubricants, and careproducts. They’re formulated and approved by the toughest judges we know: the Yamahaengineering teams that know your Yamaha from the inside out.

Genuine Yamaha Service Manuals — Get the same factory manual for your vehicle thatthe technicians at your authorized Yamaha dealer use. Service manuals are availablethrough your Yamaha dealer or you can order them directly through yamahapubs.com (USAonly).

Genuine Yamaha products are available only from your Yamaha dealer.

Find out more at www.yamaha–motor in your country of residence.



Printed on recycled paperPrinted in JapanDecember 2018–0.4 1 !



©2020 F15 - YAMAHA OWNER'S MANUALS...F15 F20 LIT-18626-12-35 6AG-28199-3G-E0 6AG-9-3G-1E0.book 1...

Documents

Transcript of ©2020 F15 - YAMAHA OWNER'S MANUALS...F15 F20 LIT-18626-12-35 6AG-28199-3G-E0 6AG-9-3G-1E0.book 1...