Operating & Maintenance Instructions -...

Document: - page 1 (Black)Screen angle and frequency: 45.0000, 150.0000

Model SeriesCovered in

This Manual

420000460000

Operating & MaintenanceInstructions

Model Type Code

Month Day YearNote: General Model Series number noted above is inclusive of the specific modelnumber found on your engine. To get replacement parts or technical assistance inthe future, write your engine Model, Type, Code and date of purchase here.

TABLE OF CONTENTSSafety 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine Information 6. . . . . . . . . . . . . . . . . . . . . . . . Oil 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel and Starting Information 8. . . . . . . . . . . . . . . Starting and Stopping 9-10. . . . . . . . . . . . . . . . . . . Maintenance 11-14. . . . . . . . . . . . . . . . . . . . . . . . . Adjustments 14-15. . . . . . . . . . . . . . . . . . . . . . . . . . Parts and Service & Storage 16. . . . . . . . . . . . . . . Warranty Information 17. . . . . . . . . . . . . . . . . . . . .

WARNINGBriggs & Stratton does not approve or authorize the use ofthese engines on 3-wheel All Terrain Vehicles (ATVs), motorbikes, aircraft products or vehicles intended for use incompetitive events. Use of these engines in such applicationscould result in property damage, serious injury (includingparalysis), or even death.

Need assistance? Go to www.briggsandstratton.comfor detailed information regarding

Briggs & Stratton engines.Or call, 1-800-233-3723, (U.S.A. and Canada)

to hear a menu of pre-recorded messages offering engine maintenance information.

PRINTED IN U.S.A. Copyright 2003 by Briggs & Stratton Corporation FORM NO. 274796-5/03


2

The Power That Works For You.

Look For Relevant Emissions Durability Period and Air Index Informa-tion On Your Engine Emissions Label

Engines that are certified to meet the California Air Resources Board (CARB) Tier 2 Emission Standards mustdisplay information regarding the Emissions Durability Period and the Air Index. Briggs & Stratton makes thisinformation available to the consumer on our emission labels. The engine emission label will indicate certificationinformation.

The Emissions Durability Period describes the number of hours of actual running time for which the engine iscertified to be emissions compliant, assuming proper maintenance in accordance with the Operating &Maintenance Instructions. The following categories are used:

Moderate: Engine is certified to be emission compliant for 125 hours of actual engine running time.

Intermediate: Engine is certified to be emission compliant for 250 hours of actual engine running time.

Extended: Engine is certified to be emission compliant for 500 hours of actual engine running time.

For example, a typical walk-behind lawn mower is used 20 to 25 hours per year. Therefore, the EmissionsDurability Period of an engine with an intermediate rating would equate to 10 to 12 years.

The Air Index is a calculated number describing the relative level of emissions for a specific engine family. Thelower the Air Index, the cleaner the engine. This information is displayed in graphical form on the emissionslabel.

After July 1, 2000, Look For Emissions Compliance Period OnEngine Emissions Compliance Label

After July 1, 2000 certain Briggs & Stratton engines will be certified to meet the United States EnvironmentalProtection Agency (USEPA) Phase 2 emission standards. For Phase 2 certified engines, the EmissionsCompliance Period referred to on the Emissions Compliance label indicates the number of operating hours forwhich the engine has been shown to meet Federal emission requirements. For engines less than 225 ccdisplacement, Category C = 125 hours, B = 250 hours and A = 500 hours. For engines of 225 cc or more,Category C = 250 hours, B = 500 hours and A = 1000 hours.

The displacement of Model Series 420000 engines is 694 cc. The displacement of Model Series 460000 enginesis 745 cc.

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3

BEFORE OPERATING ENGINE

• Read entire Operating & Maintenance Instructions ANDthe instructions for the equipment this engine powers.*

• Failure to follow instructions could result in serious injuryor death.

THE OPERATING & MAINTENANCE INSTRUCTIONSCONTAIN SAFETY INFORMATION TO• Make you aware of hazards associated with engines• Inform you of the risk of injury associated with those hazards, and• Tell you how to avoid or reduce the risk of injury.

274796

The safety alert symbol ( ) is used to identify safetyinformation about hazards that can result in personal injury.

A signal word (DANGER, WARNING, or CAUTION) isused with the alert symbol to indicate the likelihood and thepotential severity of injury. In addition, a hazard symbolmay be used to represent the type of hazard.

DANGER indicates a hazard which, if notavoided, will result in death or serious injury.

WARNING indicates a hazard which, if notavoided, could result in death or serious injury.

CAUTION indicates a hazard which, if notavoided, might result in minor or moderateinjury.

CAUTION, when used without the alert symbol,indicates a situation that could result in damageto the engine.

WARNINGThe engine exhaust from this prod-uct contains chemicals known to theState of California to cause cancer,birth defects, or other reproductiveharm.

HAZARD SYMBOLS AND MEANINGS

Explosion

Toxic Fumes

Moving Parts

ShockHot Surface

Kickback

Fire

THE INTERNATIONAL SYMBOLS USEDON THE ENGINE OR

IN THIS MANUAL INCLUDE:

On Off

Fuel Shutoff

Read Owner�sManual

Stop FuelChoke

Safety Alert

Oil

* Briggs & Stratton does not necessarily know what equipment this engine will power. For that reason, you should carefully readand understand the operating instructions for the equipment on which your engine is placed.


4

SAFETY

Gasoline and its vapors are extremelyflammable and explosive.

Fire or explosion can cause severe burnsor death.

WARNING

WHEN ADDING FUEL• Turn engine OFF and let engine cool at least 2

minutes before removing gas cap.• Fill fuel tank outdoors or in well-ventilated area.• Do not overfill fuel tank. Fill tank to approximately

1-1/2 inches below top of neck to allow for fuelexpansion.

• Keep gasoline away from sparks, open flames,pilot lights, heat, and other ignition sources.

• Check fuel lines, tank, cap, and fittings frequentlyfor cracks or leaks. Replace if necessary.

WHEN STARTING ENGINE• Make sure spark plug, muffler, fuel cap and air

cleaner are in place.• Do not crank engine with spark plug removed.• If fuel spills, wait until it evaporates before starting

engine.• If engine floods, set choke to OPEN/RUN position,

place throttle in FAST and crank until engine starts.

WHEN OPERATING EQUIPMENT• Do not tip engine or equipment at angle which

causes gasoline to spill.• Do not choke carburetor to stop engine.

WHEN TRANSPORTING EQUIPMENT• Transport with fuel tank EMPTY or with fuel shut-off

valve OFF.

WHEN STORING GASOLINE OR EQUIPMENTWITH FUEL IN TANK• Store away from furnaces, stoves, water heaters or

other appliances that have pilot light or otherignition source because they can ignite gasolinevapors.

Starting engine creates sparking.

Sparking can ignite nearby flammablegases.

Explosion and fire could result.

WARNING

• If there is natural or LP gas leakage in area, do notstart engine.

• Do not use pressurized starting fluids becausevapors are flammable.

WARNING

Rapid retraction of starter cord (kickback) willpull hand and arm toward engine faster thanyou can let go.

Broken bones, fractures, bruises or sprainscould result.

• When starting engine, pull cord slowly untilresistance is felt, then pull rapidly.

• Remove all external equipment/engine loadsbefore starting engine.

• Direct coupled equipment components such as,but not limited to, blades, impellors, pulleys,sprockets, etc., must be securely attached.

WARNING

Rotating parts can contact or entanglehands, feet, hair, clothing, or accessories.

Traumatic amputation or severe lacerationcan result.

• Operate equipment with guards in place.• Keep hands and feet away from rotating parts.• Tie up long hair and remove jewelry.• Do not wear loose-fitting clothing, dangling

drawstrings or items that could become caught.


5

SAFETY

Engines give off carbon monoxide, anodorless, colorless, poison gas.

Breathing carbon monoxide can causenausea, fainting or death.

WARNING

• Start and run engine outdoors.• Do not start or run engine in enclosed area, even if

doors or windows are open.

WARNING

Running engines produce heat. Engineparts, especially muffler, become extremelyhot.

Severe thermal burns can occur on contact.

Combustible debris, such as leaves, grass,brush, etc. can catch fire.

• Allow muffler, engine cylinder and fins to coolbefore touching.

• Remove accumulated combustibles from mufflerarea and cylinder area.

• Install and maintain in working order a sparkarrester before using equipment on forest-covered,grass-covered, brush-covered unimproved land.The state of California requires this (Section 4442of the California Public Resources Code). Otherstates may have similar laws. Federal laws applyon federal land.

WARNING

Unintentional sparking can result in fire orelectric shock.

Unintentional start-up can result in en-tanglement, traumatic amputation, or lac-eration.

BEFORE PERFORMING ADJUSTMENTS ORREPAIRS• Disconnect spark plug wire and keep it away from

spark plug.• Disconnect battery at negative terminal (only

engines with electric start).

WHEN TESTING FOR SPARK• Use approved spark plug tester.• Do not check for spark with spark plug removed.

ENGINE INFORMATION

TECHNICAL INFORMATIONPOWER RATINGS: The power ratings for an individual enginemodel are initially developed by starting with SAE (Society of Auto-motive Engineers) code J1940 (Small Engine Power & TorqueRating Procedure) (Revision 2002-05). Given both the wide arrayof products on which our engines are placed, and the variety of en-vironmental issues applicable to operating the equipment, it maybe that the engine you have purchased will not develop the ratedhorsepower when used in a piece of power equipment (actual �on-site� power). This difference is due to a variety of factors including,but not limited to, the following: differences in altitude, tempera-

ture, barometric pressure, humidity, fuel, engine lubrication, maxi-mum governed engine speed, individual engine to engine variabil-ity, design of the particular piece of power equipment, the mannerin which the engine is operated, engine run-in to reduce frictionand clean out of combustion chambers, adjustments to the valvesand carburetor, and other factors. The power ratings may also beadjusted based on comparisons to other similar engines utilizedin similar applications, and will therefore not necessarily match thevalues derived using the foregoing codes.


6

ENGINE INFORMATION

1. Spark plug wire2. Carburetor3. Air cleaner4. Rotating screen5. Emission label and Engine

Model Type Code labelxxxxxx xxxx xx xxxxxxxx

6. Oil drain plug7. Crankshaft8. 12V electric starter9. Fuel filter

10. Oil fill/Dipstick11. Blower housing

35

1

2

4

8

10

9

67

11

GENERAL INFORMATIONENGINE MODELThis is a twin cylinder, L-head, air-cooled engine. It is a lowemissions engine.In the state of California, the 420000 and 460000 seriesengines covered in this manual are certified by theCalifornia Air Resources Board to meet emissions stan-dards for 125 hours. Such certification does not grant thepurchaser, owner or operator of this engine any additionalwarranties with respect to the performance or operationallife of this engine. This engine is warranted solely accordingto the product and emissions warranties stated elsewherein this manual.MODEL SERIES 420000Bore 3-7/16 in. (87.31 mm). . . . . . . . . . . . . . . . . . . . . . . . . . Stroke 2-9/32 in. (57.94 mm). . . . . . . . . . . . . . . . . . . . . . . . Displacement 42.33 cu. in. (694.0 cc). . . . . . . . . . . . . . . .

MODEL SERIES 460000Bore 3-9/16 in. (90.49 mm). . . . . . . . . . . . . . . . . . . . . . . . . . Stroke 2-9/32 in. (57.94 mm). . . . . . . . . . . . . . . . . . . . . . . . Displacement 45.48 cu. in. (745.2 cc). . . . . . . . . . . . . . . .

TUNE-UP SPECIFICATIONSArmature air gap 0.010 � 0.014 in. (0.25 � 0.36 mm). . .

Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . . .

Valve clearance with valve springs installed and piston 1/4 in.(6 mm) past top dead center (check when engine is cold).See Repair Manual P/N 271172.Intake 0.006 � 0.008 in. (0.15 � 0.20 mm). . . . . . . . . . . . .

Exhaust 0.009 � 0.011 in. (0.23 � 0.28 mm). . . . . . . . . . .

Note: For practical operation, the horsepower loadingshould not exceed 85% of rated horsepower. Engine powerwill decrease 3-1/2% for each 1,000 feet (300 meters)above sea level and 1% for each 10° F (5.6° C) above 77° F(25° C). It will operate satisfactorily at an angle up to 15°.


7

OIL274796

CAUTION: This engine is shipped from Briggs &Stratton without oil. Check oil level before startingengine. If you start the engine without oil, the enginewill be damaged beyond repair and will not becovered under warranty.

OIL CAPACITYEngine without oil filter holds approximately 1-1/2 quarts(48 ounces; 1.4 liter).

Engine equipped with oil filter holds approximately1-3/4 quarts (56 ounces; 1.7 liters).

TYPE OF OIL TO USE• Use a high quality detergent oil classified �For Service

SF, SG, SH, SJ� or higher, such as Briggs & Stratton30W, Part Number 100005 (20 oz) or 100028 (48 oz).

• Do not use special additives.• Choose a viscosity according to the table opposite.

Note: Synthetic oil meeting ILSAC GF-2, APIcertification mark and API service symbol(shown at left) with �SJ/CF ENERGY CON-SERVING� or higher, is an acceptable oil at alltemperatures. Use of synthetic oil does notalter required oil change intervals.

°F -20 0 20 40 60 80 100

°C -30 -20 -10 0 10 20 30 40

STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

*

**

32

* CAUTION: Use 5W-30 oil or synthetic oil if anticipatedtemperatures are below 40° F (4° C) to preventinternal engine damage at startup due to inadequatelubrication. Air cooled engines run hotter thanautomotive engines. The use of non-syntheticmulti-viscosity oils, e.g. 5W-30, in temperaturesabove 40° F (4° C) will result in higher than normal oilconsumption. When using a multi-viscosity oil, checkoil level more frequently.

** CAUTION: SAE 30 oil, if used below 40° F (4° C), willresult in hard starting and possible engine boredamage due to inadequate lubrication.

SAE Viscosity Grades

CHECKING AND ADDING OIL• Check oil level before starting the engine.• Check level daily, or after every eight (8) hours.

• Keep oil level at FULL.• Do not overfill.

[1] Place engine level. Cleanaround oil fill and dipstick.

[2] Remove dipstick and wipe clean with cloth.

[3] Then push dipstick back in and remove to check oil level.

FULL

ÏÏ

ÏÏÏÏ

Oil Fill

Dipstick

[4] Remove dipstick. Pour oilslowly.

[5] Fill to FULL line on dipstick� recheck. [6] Replace dipstick firmly.

FULL

ÏÏÏÏ


8

FUEL

TYPE OF FUEL TO USE• Use clean, fresh, regular unleaded gasoline with a

minimum of 77 octane. Fresh fuel prevents gum fromforming in the fuel system or on essential carburetor parts.Purchase fuel in quantity that can be used within 30 days.

• Do not use gasoline which contains Methanol.• Do not mix oil with gasoline.• For engine protection use Briggs & Stratton Gasoline

Additive available from your Authorized Briggs &Stratton Dealer (P/N 5041 or single use pouch).

• This engine is certified to operate on gasoline. ExhaustEmission Control System: EM (Engine Modifications).

CAUTION: Some fuels, called oxygenated or reformu-lated gasoline, are gasoline blended with alcohols orethers. Excessive amounts of these blends can damagethe fuel system or cause performance problems. If anyundesirable operating symptoms occur, use gasolinewith a lower percentage of alcohol or ether.

ADDING FUEL

WARNING[1] Remove cap. Fill tank to approximately 1-1/2

inches below top of neck to allow for fuelexpansion. Be careful not to overfill.Briggs & Stratton Smart-fill� fuel can fills to thecorrect level and automatically shuts off, reduc-ing spills and emissions.

[2] Replace cap before starting.

• Turn engine OFF and let engine cool at least 2minutes before removing gas cap.

• Fill fuel tank outdoors or in well-ventilated area.• Keep gasoline away from sparks, open flames,

pilot lights, heat, and other ignition sources.• If fuel spills, wait until it evaporates before

starting engine.

STARTING

WARNING

• Do not use pressurized starting fluids.• Vapors are flammable.

OIL PRESSURE SWITCHIf engine is equipped with an oil pressure switch, the switchwill either activate a warning device or stop the enginewhen the engine runs low on oil. (Read the operatinginstructions supplied by the equipment manufacturer todetermine which way your engine is equipped because theequipment manufacturer supplies the oil pressure gauge.)See oil pressure on page 12 for oil filling instructions.

STARTING AND OPERATING TIPS♦Store and fuel equipment in level position.♦Use fresh fuel. (See Fuel.)♦Use correct type of oil for expected starting

temperature. (See Oil.)♦Remove external equipment/engine loads. (See

equipment operating instructions.)♦Start lawn mower on hard surface or over previously

cut grass.

♦Periodically remove grass buildup under mowerdeck. (See Maintenance.)

♦After engine has started, let it warm up severalseconds to several minutes, depending on outsidetemperature.

♦For maximum performance and life, operate enginewith choke in RUN and throttle in FAST.


9

STARTING AND STOPPING

REWIND (MANUAL) STARTERTO START ENGINE

[1] Check oil level (see p. 7).

[2] Open fuel shut-off valve (if equipped).

[3] Move choke control to CHOKE orSTART.

[4] Move throttle to FAST (if equipped). Operate en-gine with throttle in FAST.

Choke

FULL

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ÏÏÏÏ

[5] Grasp rope handle. Pull slowlyuntil resistance is felt, then pullrapidly to start engine and avoidkickback.

[6] Let engine warm up.Choke Equipped: Movechoke control levertoward RUN a short dis-tance at a time over sev-eral seconds in warmweather or minutes in coldweather. Let engine runsmoothly before eachchange. Operate withchoke in RUN.

WARNING

Rewind starter Rope starter

TO STOP ENGINE

[1] Move throttle (if equipped) toSLOW, then to STOP.

[2] Close fuel shut-offvalve (if equipped).

CAUTION: Do not stop engineby moving chokecontrol to CHOKE.Backfire, fire or en-gine damagecould occur.


10

STARTING AND STOPPING

ELECTRIC (KEY) STARTER (if equipped)TO START ENGINE

[1] Check oil level.

[2] Open fuel shut-off valve (if equipped).

[3] Move choke control to CHOKE orSTART.

[4] Move throttle to FAST (ifequipped). Operate en-gine with throttle in FAST.

Choke

FULL

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ÏÏÏÏ

[5] Insert key and turn toSTART.

CAUTION: To prolong starter life,use short starting cycles(5 seconds maximum,then wait one minute).Follow equipmentmanufacturer�s recom-mendations for chargingbattery.

[6] Let engine warm up. ChokeEquipped: Move chokecontrol lever toward RUN ashort distance at a time overseveral seconds in warmweather or minutes in coldweather. Let engine runsmoothly before eachchange. Operate with chokein RUN.

TO STOP ENGINE

[1] Move throttle (if equipped) to SLOW.

[2] Turn key to OFF.Remove key andstore out of reach ofchildren.

[3] Close fuel shut-offvalve (if equipped).


11

MAINTENANCE

MAINTENANCERegular maintenance will improve the performance andextend the life of the engine. See any Authorized Briggs &Stratton Dealer for service. Use only genuine Briggs &Stratton parts. Other parts may not perform as well,may damage the engine, and may result in injury. Inaddition, use of other parts may void your warranty.

EMISSION CONTROLMaintenance, replacement or repair of the emissioncontrol devices and systems may be performed by anynonroad engine repair establishment or individual.However, to obtain no charge repairs under the terms andprovisions of the Briggs & Stratton warranty statement, anyservice or emission control part repair or replacement mustbe performed by a factory authorized dealer.

Task

Perform task at hourlyor calendar interval,

whichever comes first.

Eve

ry 8

Ho

urs

or

Dai

ly

25 H

ou

rs o

rE

very

Sea

son

50 H

ou

rs o

rE

very

Sea

son

100

Ho

urs

or

Eve

ry S

easo

n

100-

300

Ho

urs

Check oil Level �

Change oil �*

Change oil filter(if equipped) �

Service air cleanerpre-cleaner (if equipped) �**

Service air cleaner car-tridge (if not equippedwith pre-cleaner)

�**

Service air cleaner car-tridge (if equipped withpre-cleaner)

�**

Inspect spark arrester (if equipped) �

Clean or replacespark plugs �

Replace in-line fuel filter(if equipped) �

Clean cooling system �**

Clean combustionchamber �

* Change oil after first 5 to 8 hours of use, then every50 hours or every season. Change oil every 25 hourswhen operating the engine under heavy load or in hightemperatures.

** Clean more often under dusty conditions or whenairborne debris is present. Replace air cleaner parts, ifvery dirty.

CAUTION: Used oil is a hazardous waste product.Dispose of used oil properly. Do not discard withhousehold waste. Check with your local authorities,service center, or dealer for safe disposal/recyclingfacilities.

CHANGING OIL

[1] Place engine level.

[2] Disconnect spark plugwires and keep awayfrom spark plugs. Dis-connect battery (if equip-ped with electric starter)at negative terminal.

[3] With engine OFF but still warm remove oil drainplug and drain oil into appropriate receptacle.

[4] Reinstall drain plug. Remove dipstick.

[5] Fill to FULL mark on dipstick with new oil.Do not overfill.

Note: Engine without oil filter holds approximately 1-1/2quarts (48 ounces; 1.4 liters). Engine equipped with filterholds approximately 1-3/4 quarts (56 ounces; 1.7 liters).

[6] Replace dipstick.

OIL DRAIN PLUG

Typicaldrainplug

PIPE

WARNING

FULL

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12

MAINTENANCE

CHANGING OIL FILTER (IF EQUIPPED)

Change oil filter after every 100 hours.

[1] Drain engine oil and remove oil filter.

[2] Before installing new filter, lightly oil filter gasketwith fresh, clean oil.

[3] Screw filter on by hand until gasket contacts oilfilter adapter. Tighten 1/2 to 3/4 turn more.

[4] Add fresh oil. Fill to FULL line on dipstick.

[5] Start and run engine at idle to check for leaks.

[6] Stop engine. Re-check oil level. Add oil if required.

OIL FILTER P/NSEE PAGE 16

1/2-3/4TURNMORE

OIL PRESSURE

Normal warm operating oil pressure for a pressure lubeengine (engine with oil filter) is 10 to 50 psi at normaloperating temperature. If pressure drops below normalrange, stop engine and check oil level with dipstick. If oillevel is between ADD and FULL mark on dipstick, Do notrestart engine. Contact an Authorized Briggs & StrattonService Dealer. Do not operate engine until oil pressure iscorrected.

If oil level is below ADD mark on dipstick, add oil to bringlevel to FULL mark. Restart engine and check oil pressure.If pressure is normal, continue to operate engine.

Note: Oil pressure gauge, if engine is equipped, is suppliedby manufacturer of equipment.

AIR CLEANERAll engines have an oval air cleaner cartridge. In addition,some engines have a pre-cleaner.

Pre-cleanerTo clean pre-cleaner (if equipped), separate it fromcartridge and wash in liquid detergent and water. Squeezedry in a clean cloth. Saturate in engine oil. Squeeze inclean, absorbent cloth to remove all EXCESS oil.

CAUTION: Do not use pressurized air or solvents toclean cartridge. Pressurized air can damagecartridge; solvents will dissolve cartridge.

REMOVING/INSTALLING AIR CLEANER w/o TANK

Dual element air cleaner

COVER

KNOBS

CARTRIDGEPART NO. 394019

PRE-CLEANERPART NO. 272490

CARBURETORSHIELD

BODY

WING UNTS

PRE-CLEANERand

CARTRIDGEPART NO. 5052

CARBURETORPLATE

[1] Remove knobs and cover.

[2] Slide pre-cleaner off cartridge.

[3] Remove wing nuts, and cartridge plate. Carefullyremove cartridge to prevent debris from enteringcarburetor.

[4] Reinstall cartridge and cartridge plate. Tighten wingnuts securely.

[5] Reassemble pre-cleaner on cartridge.

[6] Replace cover and tighten knobs securely.


13

MAINTENANCE

ENGINE AND ENGINE PARTSWe recommend that you see an authorized Briggs & Stratton Service Dealer for all maintenance and service of the engineand engine parts. Use only genuine Briggs & Stratton parts.

WARNINGIf you perform any maintenance on the engine, first disconnect the spark plug wirefrom the spark plug, and disconnect the battery at the negative terminal (electricstarter engines only) to prevent unintentional sparking. Unintentional sparking canresult in fire or electric shock. Unintentional start-up can result in entanglement,traumatic amputation or laceration. Use only correct tools.

WARNING• Do not strike the flywheel with a hammer or hard object because the flywheel may

later shatter during operation.• Do not tamper with governor spring, links or other parts to increase engine speed.

MUFFLERReplacement parts for themuffler must be the same andinstalled in the same positionas the original parts, other-wise fire can occur.If muffler is equipped with sparkarrestor screen, remove

screen for inspection. Replace screen if damaged or plugged.

WARNING

FUEL SYSTEMReplacement parts for fuelsystem (cap, hoses, tanks,filters, etc.) must be the sameas original parts, otherwisefire can occur.

WARNING

FUEL FILTER (if equipped)

PART NO. 394358(WITH FUEL PUMP) PART NO. 298090 or 5018

(WITHOUT FUEL PUMP)

FILTER

[1] Disconnect spark plugwires and keep awayfrom spark plugs.

[2] Drain fuel tank or closefuel shut-off valve beforereplacing fuel filter.Otherwise, fuel can leakout, creating a fire/explo-sion hazard.

WARNING

SPARK PLUGUse only Briggs & Stratton Spark Tester (part number19368) to check for spark.Note: In some areas, locallaw requires using resistorspark plug to suppress igni-tion signals. If this enginewas originally equipped withresistor spark plug, usesame type for replacement.

.030� (0.76 mm)WIRE GAGE

RESISTOR P/N 802592

AIR COOLING SYSTEM

Debris may clogthe engine�s aircooling system.Remove blowerhousing andclean area shownto prevent over-heating and en-gine damage.

CLEAN AREAS OFALL DIRT AND DEBRIS


14

MAINTENANCE

CLEANING DEBRIS

CAUTION: Do not use water to clean engine parts.Water could contaminate fuel system. Use a brushor dry cloth.

Daily or before every use, clean accumulated debris fromengine. Keep linkage, springs and controls clean. Keeparea around and behind muffler free of any combustibledebris.

Engine parts should be keptclean to reduce the risk ofoverheating and ignition of accu-mulated debris. This is especial-ly important if cutting tall grass.

WARNING

Debris Guard or Rotating Screen

DEBRISGUARD

ROTATINGSCREEN

Linkage, Springs and Controls

CLEAN

Muffler and Spark Arrester

CLEAN

SPARKARRESTER

(IF EQUIPPED)

ADJUSTMENTS

CONTROL ADJUSTMENTS

WARNING

Prevent unintentional starting.

Before performing adjustments:

• Remove spark plug wire from spark plug.• Disconnect battery at negative terminal (only

engines with electric start).

TO ADJUST REMOTE CHOKE CONTROL

[1] Remove air cleaner.

[2] Move choke control to CHOKE or START position.(Carburetor choke should be completely closed.)

[3] If not, loosen casing clamp screw.

[4] Then move casing, wire and engine choke leveruntil choke is completely closed.

[5] Tighten casing clamp screw. Replace air cleaner.

CHOKECLOSED

CASINGCLAMPSCREW

CHOKELEVER


15

ADJUSTMENTS

TO ADJUST REMOTE THROTTLE CONTROL

If the engine does not start or if it runs roughly, the remotethrottle control may need adjustment. See your authorizedBriggs & Stratton dealer or follow the instructions below.

[1] Remove air cleaner.

[2] Move throttle control to FAST. (Swivel should beagainst side of quarter circle.)

[3] If not, loosen casing clamp screw. Move casingand wire in direction shown by arrow until swivel isagainst side of quarter circle.

[4] Tighten casing clamp screw. Replace air cleaner.

SWIVEL

QUARTER CIRCLE

CASINGCLAMPSCREW

CASINGCLAMPSCREW

CARBURETOR ADJUSTMENT

WARNING

The manufacturer of the equipment on which thisengine is installed specifies top speed at which theengine will be operated. DO NOT EXCEED this speed.

Differences in fuel, temperature, altitude or load mayrequire minor carburetor adjustment. Air cleaner and aircleaner cover must be assembled to carburetor beforestarting engine.

The carburetor on this engine is low emission. It isequipped with an idle speed adjustment screw and anon-adjustable idle mixture valve.

Note: Engines operated at approximately 3000 to 5000 feet(900 to 1500 meters) above sea level may require a high alti-tude carburetor main jet. If erratic performance is observed,contact a Briggs & Stratton Authorized Service Dealer for costto install/purchase a high altitude carburetor main jet.

TO ADJUST CARBURETOR

[1] Start engine and warm up approximately 5 minutesbefore adjusting.

[2] With engine running, place throttle control in SLOWposition.

[3] Rotate carburetor throttle lever against the idlespeed screw and hold it.

[4] Turn idle speed screw to obtain 1500 to 1600 rpm.Note: Governed idle has been set to 1750 rpm at factory.

IDLESPEEDSCREW

CARBURETORTHROTTLE

LEVERNON-ADJUSTABLEIDLE MIXTURE JET

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PARTIAL LIST OF GENUINE BRIGGS & STRATTON PARTSBRIGGS & STRATTON

PART PART NO. (or equivalent)Air cleaner cartridge 394019Air cleaner pre-cleaner 272490Air cleaner pre-cleaner and cartridge 5052Oil 100005 or 100028Oil filter (3-1/2 in. long) 491056Oil filter (2-1/4 in. long) 492932 or 5049Fuel filter (with fuel pump) 394358Fuel filter (without fuel pump) 298090 or 5018Gas additive 5041Resistor spark plug 802592Long life platinum spark plug 5062(used on most L-head engines)Spark plug wrench 89838 or 5023Spark tester 19368Oil pump kit 5056(uses standard electric drill to remove oil from engine quickly)

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SERVICESee an Authorized Briggs & Stratton Service Dealer. Eachone carries a stock of Genuine Briggs & Stratton Parts andis equipped with special service tools. Trained mechanicsassure expert repair service on all Briggs & Strattonengines. Only dealers advertising as �Authorized Briggs &Stratton� are required to meet Briggs & Stratton standards.When you purchase equipment powered by aBriggs & Stratton engine, you are assured ofhighly skilled, reliable service at more than30,000 Authorized Service Dealersworldwide, including more than 5,000 MasterService Technicians. Look for these signswherever Briggs & Stratton service is offered.

You may locate your nearest Authorized Briggs & StrattonService Dealer in our dealer locator map on our web site�� or in the �Yellow Pages�

directory under �Engines, Gasoline� or �GasolineEngines,� or �Lawn Mowers� or similar category.

An illustrated shop manual includes com-mon specifications and detailed informa-tion covering adjustment, tune-up andrepair of Briggs & Stratton L-head, twincylinder, 4 cycle engines. It is available forpurchase from an Authorized Briggs &Stratton Service Dealer or you can order itfrom the factory. Write: Briggs & StrattonCorporation, Attn: Service DivisionP. O. Box 1144, Milwaukee, WI 53201 Part No. 271172

STORAGEEngines stored over 30 days need special attention.[1] To prevent gum from forming in fuel system or on

essential carburetor parts:a) if fuel tank contains oxygenated or reformulatedgasoline (gasoline blended with an alcohol or anether), run engine until it stops from lack of fuel, or b) iffuel tank contains gasoline, either run engine until itstops from lack of fuel, or add a gasoline additive to thegas in the tank. (See parts list. Single � use pouches ofgas additive are available from your service dealer.) Ifyou use a gas additive, run the engine for severalminutes to circulate the additive through the carburetor.Then, engine and fuel can be stored up to 24 months.

[2] While engine is still warm, change oil.[3] Remove spark plugs and pour about 1 oz. (30 ml) of

engine oil into each cylinder. Replace spark plugs andcrank slowly to distribute oil.

[4] Clean engine of surface debris, chaff or grass.

[5] Store in a clean, dry area. Donot store in same area as astove, furnace, water heater, orother appliance that uses a pilotlight or has a device that cancreate a spark.

WARNING

Engwnty1-03 - page 1 (Black)Screen angle and frequency: 45.0000, 150.0000

17

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LIMITED WARRANTYBriggs & Stratton Corporation will repair or replace, free of charge, any part(s) of the engine that is defective in material or workmanship or both.Transportation charges on parts submitted for repair or replacement under this warranty must be borne by purchaser. This warranty is effective for thetime periods and subject to the conditions stated below. For warranty service, find the nearest Authorized Service Dealer in our dealer locator mapat www.briggsandstratton.com, or by calling 1-800-233-3723, or as listed in the �Yellow Pages�.

THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR APARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIEDWARRANTIES ARE EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENTEXCLUSION IS PERMITTED BY LAW. Some states or countries do not allow limitations on how long an implied warranty lasts, and some states orcountries do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you.This warranty gives you specific legal rights and you may also have other rights which vary from state to state and country to country.

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Consumer Use 2 years 2 years

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* Note the following special warranty periods: 2 years for Classic engines in the European Union and Eastern European countries, for all consumer products inthe European Union, and for emission control systems on engines certified by EPA and CARB. 5 years for consumer use, 90 days for commercial use of Touch-N-Mow starter on Quantum and Intek engines. Engines used in competitive racing or on commercial or rental tracks are not warrantied.

The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time stated in the tableabove. �Consumer use� means personal residential household use by a retail consumer. �Commercial use� means all other uses, including use for commercial,income producing or rental purposes. Once an engine has experienced commercial use, it shall thereafter be considered as a commercial use engine for pur-poses of this warranty.

NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON BRIGGS & STRATTON PRODUCTS. SAVE YOUR PROOF OF PURCHASERECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THEMANUFACTURING DATE OF THE PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.

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EMISSION CONTROL WARRANTY COVERAGE IS APPLICABLE TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 1995 AND THERE-AFTER, WHICH ARE USED IN CALIFORNIA, AND TO CERTIFIED MODEL YEAR 1997 AND LATER ENGINES WHICH ARE PURCHASED ANDUSED ELSEWHERE IN THE UNITED STATES (AND AFTER JANUARY 1, 2001 IN CANADA).

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The California Air Resources Board (CARB), U.S.EPA and B&S are pleased to explain the EmissionControl System Warranty on your model year2002 and later small off-road engine (SORE). InCalifornia, new small off-road engines must be de-signed, built and equipped to meet the State�sstringent anti-smog standards.

Elsewhere in the United States, new non-road,spark-ignition engines certified for model year1997 and later must meet similar standards setforth by the U.S. EPA. B&S must warrant the emis-sion control system on your engine for the periodsof time listed below, provided there has been noabuse, neglect or improper maintenance of yoursmall off-road engine.

Your emission control system includes partssuch as the carburetor, air cleaner, ignition sys-tem, muffler and catalytic converter. Also in-cluded may be connectors and other emissionrelated assemblies.Where a warrantable condition exists, B&S willrepair your small off-road engine at no cost toyou including diagnosis, parts and labor.

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Small off-road engines are warranted relative to emission control parts defects for a period of two years, subject to provisions set forth below. If anycovered part on your engine is defective, the part will be repaired or replaced by B&S.

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As the small off-road engine owner, you are re-sponsible for the performance of the requiredmaintenance listed in your Operating and Main-tenance Instructions. B&S recommends thatyou retain all your receipts covering mainte-nance on your small off-road engine, but B&Scannot deny warranty solely for the lack of re-ceipts or for your failure to ensure the perfor-mance of all scheduled maintenance.

As the small off-road engine owner, you shouldhowever be aware that B&S may deny you war-ranty coverage if your small off-road engine or apart has failed due to abuse, neglect, impropermaintenance or unapproved modifications.You are responsible for presenting your smalloff-road engine to an Authorized B&S ServiceDealer as soon as a problem exists.

The undisputed warranty repairs should becompleted in a reasonable amount of time, notto exceed 30 days.If you have any questions regarding your war-ranty rights and responsibilities, you should con-tact a B&S Service Representative at1-414-259-5262.The emission warranty is a defects warranty.Defects are judged on normal engine perfor-mance. The warranty is not related to an in-useemission test.

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The following are specific provisions relative to your Emission Control Defects Warranty Coverage. It is in addition to the B&S engine warranty for non-regulated engines found in the Operating and Maintenance Instructions.1. Warranted Parts

Coverage under this warranty extends onlyto the parts listed below (the emission con-trol systems parts) to the extent these partswere present on the engine purchased.a. Fuel Metering System

• Cold start enrichment system• Carburetor and internal parts• Fuel Pump

b. Air Induction System• Air cleaner• Intake manifold

c. Ignition System• Spark plug(s)• Magneto ignition system

d. Catalyst System• Catalytic converter• Exhaust manifold• Air injection system, Pulse valve

e. Miscellaneous Items• Vacuum, temperature, position,

time sensitive valvesand switches

• Connectors and assemblies

2. Length of CoverageB&S warrants to the initial owner and eachsubsequent purchaser that the WarrantedParts shall be free from defects in materialsand workmanship which caused the failureof the Warranted Parts for a period of twoyears from the date the engine is delivered toa retail purchaser.

3. No ChargeRepair or replacement of any WarrantedPart will be performed at no charge to theowner, including diagnostic labor whichleads to the determination that a WarrantedPart is defective, if the diagnostic work isperformed at an Authorized B&S ServiceDealer. For emissions warranty servicecontact your nearest Authorized B&S Ser-vice Dealer as listed in the �Yellow Pages�under �Engines, Gasoline,� �Gasoline En-gines,� �Lawn Mowers,� or similar category.

4. Claims and Coverage ExclusionsWarranty claims shall be filed in accordancewith the provisions of the B&S Engine War-ranty Policy. Warranty coverage shall be ex-cluded for failures of Warranted Parts whichare not original B&S parts or because ofabuse, neglect or improper maintenance as

set forth in the B&S Engine Warranty Policy.B&S is not liable to cover failures of War-ranted Parts caused by the use of add-on,non-original, or modified parts.

5. MaintenanceAny Warranted Part which is not scheduledfor replacement as required maintenance orwhich is scheduled only for regular inspec-tion to the effect of �repair or replace as nec-essary� shall be warranted as to defects forthe warranty period. Any Warranted Partwhich is scheduled for replacement as re-quired maintenance shall be warranted as todefects only for the period of time up to thefirst scheduled replacement for that part. Anyreplacement part that is equivalent in perfor-mance and durability may be used in the per-formance of any maintenance or repairs.The owner is responsible for the perfor-mance of all required maintenance, as de-fined in the B&S Operating and MaintenanceInstructions.

6. Consequential CoverageCoverage hereunder shall extend to the fail-ure of any engine components caused bythe failure of any Warranted Part still underwarranty.

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6,077,0636,064,0276,014,8085,894,7155,852,9515,823,153

5,819,5135,813,3845,765,7135,645,0255,642,7015,619,845

5,606,9485,606,8515,548,9555,546,9015,503,1255,501,203

5,497,6795,320,7955,271,3635,269,7135,265,7005,243,878

5,235,9435,197,4255,197,4225,191,8645,188,0695,186,142

5,138,9965,086,8905,070,8295,058,5445,040,6445,009,208

4,996,9564,977,8794,971,2194,895,1194,819,5934,719,682

4,633,5564,630,4984,522,0804,520,2884,512,4994,453,507

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POUR LES PETITS MOTEURS HORS ROUTE ETAUX NORMES ENVIRONNEMENTALES

AMÉRICAINES (EPA PHASE 2) POUR LESPETITS MOTEURS HORS ROUTE. CONSULTEZ

LE MANUEL DU PROPRIÉTAIRE POUR LES SPÉCIFICATIONS, L’ENTRETIEN ET LES

AJUSTEMENTS. CONFORME À LA PÉRIODE D’ÉMISSION EPA : CATÉGORIE : C

FAMILLE YBSXS.3192VA 274812

INFORMATIONS IMPORTANTESCORPORATION BRIGGS & STRATTON

Operating & Maintenance Instructions -...

Documents

Transcript of Operating & Maintenance Instructions -...