Generator

LIT-19626-01-14 7NJ-28199-12PRINTED ON RECYCLED PAPERPRINTED IN JAPAN03 908 – 0.4 × 1 !

EF1600EF2600

YG2600

OWNER’S MANUAL

7NJ-9-12 Hyoshi 10/27/03 9:03 AM Page 1

7NJ-9-12 Hyoshi 10/27/03 9:03 AM Page 2

AE00002

INTRODUCTIONCongratulations on your purchase of your new Yamaha.This manual will provide you with a good basic understanding of the operation andmaintenance of this machine.If you have any questions regarding the operation or maintenance of your machine,please consult a Yamaha dealer.

PRI-I.D. NUMBER AE00012

IDENTIFICATION NUMBER RECORDSRecord your Primary I.D., and serial num-bers in the spaces provided, to assist youin ordering spare parts from a Yamahadealer.Also record and keep these I.D. numbersin a separate place in case your machineis stolen.

AE00011

MACHINE IDENTIFICATIONThe machine serial number is stamped inthe location as shown.

NOTE:The first three digits of these numbers arefor model identification; the remaining dig-its are the unit production number. Keep arecord of these numbers for referencewhen ordering parts from a Yamaha deal-er.

EF1600/EF2600/YG2600OWNER’S MANUAL

© 2003 by Yamaha Motor Corporation, U.S.A.1st Edition, August 2003

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

Yamaha Motor Corporation, U.S.A.is expressly prohibited.

Printed in Japan.P/N LIT-19626-01-14

790-025a

MODEL

PRI-I.D.CODE SERIAL No.

790-062

AE00022

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851-005

AE00032

wPLEASE READ AND UNDERSTANDTHIS MANUAL COMPLETELY BEFOREOPERATING THE MACHINE.

Particularly important information is distin-guished in this manual by the followingnotations.

-The Safety Alert Symbol means ATTEN-TION! BECOME ALERT! YOUR SAFETYIS INVOLVED!

wFailure to follow WARNING instructionscould result in severe injury or death tothe engine operator, a bystander, or aperson inspecting or repairing the engine.

cCA CAUTION indicates special precautionsthat must be taken to avoid damage to theengine.

NOTE:A NOTE provides key information to makeprocedures easier or clearer.

NOTE:9 Yamaha continually seeks advance-

ments in product design and quality.Therefore, while this manual containsthe most current product informationavailable at the time of printing, theremay be minor discrepancies betweenyour engine and this manual. If thereis any question concerning this manu-al, please consult your Yamaha deal-er.

9 This manual should be considered apermanent part of this engine andshould remain with this engine whenresold.

7NJ-9-12A 10/27/03 10:20 AM Page b

AE00041

CONTENTS

LIMITED WARRANTY (EF- AND

EDL-SERIES) ........................................1

LIMITED WARRANTY (EC- AND

YG-SERIES) ..........................................2

LOCATION OF IMPORTANT

LABELS .................................................4

SAFETY INFORMATION.......................5

EXHAUST FUMES ARE

POISONOUS ......................................5

FUEL IS HIGHLY FLAMMABLE AND

POISONOUS ......................................5

ENGINE AND MUFFLER MAY

BE HOT ..............................................5

ELECTRIC SHOCK PREVENTION....6

CONNECTION NOTES ......................7

CONNECTION....................................7

EXTENSION CORD NOTES ..............7

CONTROL FUNCTION ..........................8

DESCRIPTION ...................................8

CONTROL BOX..................................9

OIL WARNING SYSTEM..................10

ENGINE SWITCH.............................10

AC SWITCH (N.F.B.) ........................10

G.F.C.I. RECEPTACLE ....................11

PRE-OPERATION CHECK .................12

FUEL.................................................12

ENGINE OIL .....................................13

GROUND (Earth)..............................13

OPERATION ........................................14

STARTING THE ENGINE.................14

APPLICATION RANGE ....................15

CONNECTION..................................16

STOPPING THE ENGINE ................17

PERIODIC MAINTENANCE ................18

MAINTENANCE CHART ..................18

SPARK PLUG INSPECTION............20

CARBURETOR ADJUSTMENT .......20

ENGINE OIL REPLACEMENT .........21

AIR FILTER ......................................22

FUEL COCK .....................................23

FUEL TANK FILTER.........................23

MUFFLER SCREEN AND SPARK

ARRESTER ......................................24

G.F.C.I. RECEPTACLE TEST ..........25

TROUBLESHOOTING......................26

STORAGE ...........................................28

DRAIN THE FUEL ............................28

ENGINE ............................................28

EXHAUST EMISSION CONTROL

SYSTEM AND COMPONENTS ...........29

SPECIFICATIONS ...............................30

DIMENSIONS ...................................30

ENGINE ............................................30

GENERATOR ...................................30

WIRING DIAGRAM..............................31

EF1600/EF2600................................31

YG2600.............................................32

ENGINE HANGER

INSTALLATION ..................................33

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Yamaha Motor Corporation, U.S.A. hereby war-rants that new Yamaha consumer generators pur-chased from an authorized Yamaha consumergenerator dealer in the continental United Stateswill be free from defects in material and workman-ship for the period of time stated herein, subject tocertain stated limitations.

THE PERIOD OF WARRANTY Any new EF-series or EDL-series Yamaha Generator pur-chased for private, non-commercial use from anauthorized Yamaha consumer generator dealer inthe continental United States will be warranted against defects in material or work-manship for a period two (2) years from date ofpurchase, subject to exclusions noted herein. AnyYamaha non-commercial generator purchased and utilized for commercialor rental applications will be warranted for a periodone (1) year from the date of purchase, subject toexclusions noted herein.

DURING THE PERIOD OF WARRANTY anyauthorized Yamaha consumer generator dealerwill, free of charge, repair or replace, at Yamaha’soption, any part adjudged defective by Yamahadue to faulty workmanship or material from thefactory. Parts used in warranty repairs will be war-ranted for the balance of the product’s warrantyperiod. All parts replaced under warranty becomeproperty of Yamaha Motor Corporation U.S.A.

GENERAL EXCLUSIONS from this warranty shallinclude any failures caused by:a. Installation of parts or accessories that are not

qualitatively equivalent to genuine Yamahaparts.

b. Abnormal strain, neglect, or abuse.c. Lack of proper maintenance.d. Accident or collision damage.

SPECIFIC EXCLUSIONS from this warranty shallinclude parts replaced due to normal wear or rou-tine maintenance.

THE CUSTOMER’S RESPONSIBILITY under thiswarranty shall be to:1. Operate and maintain the generator as speci-

fied in the appropriate Owner’s Manual;

2. Give notice to an authorized Yamaha con-sumer generator dealer of any and all appar-ent defects within ten (10) days after discov-ery, and make the unit available at that timefor inspection and repairs at such dealer’splace of business.

WARRANTY TRANSFER: To transfer the warrantyfrom the original purchaser to any subsequentpurchaser(s), it is imperative that the unit beinspected and registered for warranty by anauthorized Yamaha consumer generator dealer. Inorder for this warranty to remain in effect, thisinspection and registration must take place withinten (10) days after transfer. An inspection and reg-istration fee will be charged for this service. In nocase will the warranty be extended beyond theoriginal period.

YAMAHA MOTOR CORPORATION, U.S.A. MAKESNO OTHER WARRANTY OF ANY KIND,EXPRESSED OR IMPLIED. ALL IMPLIED WAR-RANTIES OF MERCHANTABILITY AND FITNESSFOR A PARTICULAR PURPOSE WHICH EXCEEDTHE OBLIGATIONS AND TIME LIMITS STATED INTHIS WARRANTY ARE HEREBY DISCLAIMED BYYAMAHA MOTOR CORPORATION, U.S.A. ANDEXCLUDED FROM THIS WARRANTY.

SOME STATES DO NOT ALLOW LIMITATIONS ONHOW LONG AN IMPLIED WARRANTY LASTS, SOTHE ABOVE LIMITATION MAY NOT APPLY TOYOU. ALSO EXCLUDED FROM THIS WARRANTYARE ANY INCIDENTAL OR CONSEQUENTIALDAMAGES INCLUDING LOSS OF USE. SOMESTATES DO NOT ALLOW THE EXCLUSION ORLIMITATION OF INCIDENTAL OR CONSEQUEN-TIAL DAMAGES, SO THE ABOVE EXCLUSIONMAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGALRIGHTS, AND YOU MAY ALSO HAVE OTHERRIGHTS WHICH VARY FROM STATE TO STATE.

YAMAHA MOTOR CORPORATION, U.S.A.Post Office Box 6555

Cypress, California 90630

AE01119

YAMAHA MOTOR CORPORATION U.S.A. EF- AND EDL-SERIES GENERATOR LIMITED WARRANTY

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Yamaha Motor Corporation, U.S.A. hereby war-rants that new Yamaha EC- and YG-series gener-ators purchased from an authorized Yamahaindustrial generator dealer in the continentalUnited States will be free from defects in materialand workmanship for the period of time statedherein, subject to certain stated limitations.

THE PERIOD OF WARRANTY for Yamaha EC-series and YG-series generators shall be one (1)year from the date of purchase.

DURING THE PERIOD OF WARRANTY anyauthorized Yamaha industrial generator dealerwill, free of charge, repair or replace, at Yamaha’soption, any part adjudged defective by Yamahadue to faulty workmanship or material from thefactory. Parts used in warranty repairs will be war-ranted for the balance of the product’s warrantyperiod. All parts replaced under warranty becomeproperty of Yamaha Motor Corporation U.S.A.

GENERAL EXCLUSIONS from this warranty shallinclude any failures caused by:a. Installation of parts or accessories that are not

qualitatively equivalent to genuine Yamahaparts.

b. Abnormal strain, neglect, or abuse.c. Lack of proper maintenance.d. Accident or collision damage.

SPECIFIC EXCLUSIONS from this warranty shallinclude parts replaced due to normal wear or rou-tine maintenance.

THE CUSTOMER’S RESPONSIBILITY under thiswarranty shall be to:1. Operate and maintain the diesel generator as

specified in the appropriate Owner’s Manual;

2. Give notice to an authorized Yamaha industri-al generator dealer of any and all apparentdefects within ten (10) days after discovery,and make the unit available at that time forinspection and repairs at such dealer’s placeof business.

WARRANTY TRANSFER: To transfer the warran-ty from the original purchaser to any subsequentpurchaser(s), it is imperative that the unit beinspected and registered for warranty by an autho-rized Yamaha industrial generator dealer. In orderfor this warranty to remain in effect, this inspectionand registration must take place within ten (10)days after transfer. An inspection and registrationfee will be charged for this service. In no case willthe warranty be extended beyond the original peri-od.

YAMAHA MOTOR CORPORATION, U.S.A. MAKESNO OTHER WARRANTY OF ANY KIND,EXPRESSED OR IMPLIED. ALL IMPLIED WAR-RANTIES OF MERCHANTABILITY AND FITNESSFOR A PARTICULAR PURPOSE WHICH EXCEEDTHE OBLIGATIONS AND TIME LIMITS STATED INTHIS WARRANTY ARE HEREBY DISCLAIMED BYYAMAHA MOTOR CORPORATION, U.S.A. ANDEXCLUDED FROM THIS WARRANTY.

SOME STATES DO NOT ALLOW LIMITATIONS ONHOW LONG AN IMPLIED WARRANTY LASTS, SOTHE ABOVE LIMITATION MAY NOT APPLY TOYOU. ALSO EXCLUDED FROM THIS WARRANTYARE ANY INCIDENTAL OR CONSEQUENTIALDAMAGES INCLUDING LOSS OF USE. SOMESTATES DO NOT ALLOW THE EXCLUSION ORLIMITATION OF INCIDENTAL OR CONSEQUEN-TIAL DAMAGES, SO THE ABOVE EXCLUSIONMAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGALRIGHTS, AND YOU MAY ALSO HAVE OTHERRIGHTS WHICH VARY FROM STATE TO STATE.

YAMAHA MOTOR CORPORATION, U.S.A.Post Office Box 6555

Cypress, California 90630

YAMAHA MOTOR CORPORATION U.S.A. EC- AND YG-SERIES INDUSTRIAL GENERATOR LIMITED WARRANTY

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Q. What costs are my responsibility during thewarranty period?

A. The customer’s responsibility includes allcosts of normal maintenance service, non-warranty repairs, accident damages, as wellas oil and spark plugs.

Q. What are some examples of “abnormal” strain,neglect, or abuse?

A. These terms are general and overlap eachother in areas. Specific examples include:Running the machine out of oil; lack of propermaintenance; operating the machine with abroken or damaged part which causes anoth-er part to fail; and so on. If you have anyspecific questions on operation or mainte-nance, please contact your dealer for advice.

Q. Does the warranty cover incidental costs suchas transportation due to a failure?

A. No. The warranty is limited to repair of themachine itself.

Q. May I perform any or all of the recommendedmaintenance shown in the Owner’s Manualinstead of having the dealer do them?

A. Yes, if you are a qualified mechanic and followthe procedures specified in the Owner’s andService Manual. We do recommend, however,that items requiring special tools or equipmentbe done by a Yamaha generator dealer.

Q. Will the warranty be void or cancelled if I donot operate or maintain my new Yamahaexactly as specified in the Owner’s Manual?

A. No. The warranty on a new Yamaha cannotbe “voided” or “cancelled.”However, if a particular failure is caused byoperation or maintenance other than asshown in the Owner’s Manual, that failuremay not be covered under warranty.

Q. What responsibility does my dealer haveunder this warranty?

A. Each Yamaha generator dealer is expectedto:1. Check the operation of the generator

before sale.2. Explain the operation, maintenance, and

warranty requirements to your satisfactionat the time of sale, and upon your requestat any later date.

In addition, each Yamaha generator dealer isheld responsible for his setup, service andwarranty repair work.

Q. Is the warranty transferable to second own-ers?

A. Yes. The remainder of the existing warrantycan be transfered upon request.The unit has to be inspected and reregisteredby an authorized Yamaha generator dealer forthe policy to remain effective.

CUSTOMER SERVICE

If your machine requires warranty service, youmust take it to any authorized Yamaha generatordealer within the continental United States. Besure to bring your warranty registration identifica-tion or other valid proof of the original date of pur-chase. If a question or problem arises regardingwarranty, first contact the owner of the dealership.Since all warranty matters are handled at the deal-er level, this person is in the best position to helpyou. If you are still not satisfied and require addi-tional assistance, please write:

YAMAHA MOTOR CORPORATION U.S.A. CUSTOMER RELATIONS DEPARTMENT

P.O. BOX 6555Cypress, California 90630

CHANGE OF ADDRESS

The federal government requires each manufac-turer to maintain a complete, up-to-date list of allfirst purchasers against the possibility of a safety-related defect and recall. This list is compiled fromthe purchase registrations sent to Yamaha MotorCorporation, U.S.A. by the selling dealer at thetime of your purchase. If you should move afteryou have purchased your new generator, pleaseadvise us of your new address by sending a post-card listing your Yamaha model name, enginenumber, dealer number (or dealer’s name) as it isshown on your warranty identification, your nameand new mailing address. Mail to:

YAMAHA MOTOR CORPORATION, U.S.A.WARRANTY DEPARTMENT

P.O. Box 6555Cypress, California 90630

This will ensure that Yamaha Motor Corporation,U.S.A. has an up-to-date registration record inaccordance with federal law.

WARRANTY QUESTIONS AND ANSWERS

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AE00062

LOCATION OF IMPORTANT LABELSPlease read the following labels carefully before oper-ating this machine.

NOTE:Maintain or replace safety and instruction labels, asnecessary.

WARNINGREAD THE OWNER‘S MANUAL AND ALL LABELS BEFORE OPERATING.

q qAVERTISSEMENT8

ONLY OPERATE IN WELL-VENTILATED AREA.EXHAUST GAS CONTAINS POISONOUS CARBON MONOXIDE.CHECK FOR SPILLED FUEL OR FUEL LEAKS.STOP ENGINE BEFORE REFUELING.DO NOT OPERATE NEAR FLAMMABLE MATERIALS.ELECTROCUTION CAN OCCUR IF GENERATOR IS USED IN RAIN,SNOW, OR NEAR WATER. KEEP THIS UNIT DRY AT ALL TIMES.

8

8

8

8

8

MACHINE AU SEC EN TOUTES CIRCONSTANCES.7NJ-24162-10

8

8

8

8

8

8

LISEZ LE MODE D‘EMPLOI ET TOUTES LES ETIQUETTES AVANT DEFAIRE FONCTIONNER LA MACHINE.FAITES FONCTIONNER UNIQUEMENT DANS DES LIEUX BIEN AERES.LES GAZ D‘ECHAPPEMENT CONTIENNENT DU MONOXYDE DE CARBONE.VERIFIEZ SI DU CARBURANT A ETE RENVERSE DU S‘IL FUIT.ARRETEZ LE MOTEUR AVANT DE FAIRE LE PLEIN DE CARBURANT.N‘UTILISEZ PAS A PROXIMITE DE MATERIAUX INFLAMMABLES.IL Y A RISQUE D‘ELECTROCUTION SI LE GENERATEUR FONCTIONNESOUS LA PLUIE, DANS LA NEIGE, OU PRES DE L‘EAU. GARDEZ LAMACHINE AU SEC EN TOUTES CIRCONSTANCES.

WARNINGElectrocution Or property damagecan occur: Do not connect thisgenerator to any building ’s electricalsystem unless an isolation switchhas been installed by a licensed elec-trician. Refer to the owner’s manual.

qet

792-004

wr

792-003

HOT EXHAUST

1

3

0 2 4 6 8 1 0

ENGINE AIR INDEX ( C a l i f o r n i a o n l y )

LEAST CLEANMOST C L E A NN O T E : T H E L O W E R T H E A I R I N D E X , T H E L E S S T H E P O L L U T I O N

F O R T H E F O L L O W I N G U S E : T H I S E N G I N E I S C E R T I F I E D T O B E E M I S S I O N C O M P L I A N T

MODERATE INTERMEDIATE EXTENDEDCHECK OWNERS M A N U A L F O R F U R T H E R D E T A I L S

T H I S L A B E L T O B E R E M O V E D B Y T H E U L T I M A T E P U R C H A S E R O N L Y !

IMPORTANT ENGINE INFORMATIONENGINE FAMILY : zzzzzzzzzzzz

E MREFER TO OWNER'S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.

THIS ENGINE MEETS zzzz-zzzz CALIFORNIA EMISSION REGULATIONS FOR SMALL OFF-ROAD ENGINES.THIS ENGINE CONFORMS TO PHASE 2 U.S.EPA REGULATIONS FOR SMALL NONROAD ENGINES.

YAMAHA MOTOR CO. LTD zzz-2179R-zz

DISPLACEMENT: VALVE LASH (A)

rpm

NO OTHER ADJUSTMENTS NEEDED.

ENGINE OIL:

IDLE SPEED:

FUEL: THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED GASOLINE.

IGNITION TIMING & IDLE MIXTURE

zzzJ IN:

TYPE

z.zz~z.zz EX: z.zz~z.zz

zzzz~zzzz AT NO LOAD

SESAE 10W-30EMISSIONS COMPLIANCE PERIOD:CATEGORY A (EPA)

4

2

5

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741-002

AE00071

SAFETY INFORMATION

AE00072

EXHAUST FUMES ARE POISONOUS9 Never operate the engine in a closed area or it

may cause unconsciousness and death within ashort time. Operate the engine in a well ventilatedarea.

AE00075

FUEL IS HIGHLY FLAMMABLE AND POISONOUS9 Always turn off the engine when refuelling.9 Never refuel while smoking or in the vicinity of an

open flame.9 Take care not to spill any fuel on the engine or

muffler when refuelling.9 If you swallow any fuel, inhale fuel vapor, or allow

any to get in your eye(s), see your doctor immedi-ately. If any fuel spills on your skin or clothing,immediately wash with soap and water andchange your clothes.

741-003

741-005

741-004

9 When operating or transporting the machine, besure it is kept upright. If it tilts, fuel may leak fromthe carburetor or fuel tank.

741- 006

AE00843

ENGINE AND MUFFLER MAY BE HOT9 Place the machine in a place where pedestrians

or children are not likely to touch the machine.

741-007

9 Avoid placing any flammable materials near theexhaust outlet during operation.

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741-008a

a

9 Keep the machine at least 1 m (3 ft) from buildingsor other equipment, or the engine may overheat.

a 1 m (3 ft)

741-009

9 Avoid operating the engine with a dust cover.

q

741-067

9 Be sure to carry the generator only by its carryinghandle(s).

1 Carrying handle(s) (shaded)

741-010

AE00083

ELECTRIC SHOCK PREVENTION9 Never operate the engine in rain or snow.

741-011

9 Never touch the machine with wet hands or elec-trical shock will occur.

q

741-012b

9 Be sure to ground (earth) the generator.NOTE:Use ground (earth) lead of sufficient current capacity.

1 Lead diameter

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Ground (earth) LeadDiameter:

0.12 mm (0.005 in)/ampereEX;

10 Ampere → 1.2mm (0.05 in)

AE00088

CONNECTION NOTES9 Avoid connecting the generator to commercial

power outlet.9 Avoid connecting the generator in parallel with any

other generator.

1 Correct2 Incorrect

AE00091

CONNECTION

wBefore the generator can be connected to a build-ing’s electrical system, a licensed electrician mustinstall an isolation (transfer) switch in the build-ing’s main fuse box. The switch is the connectionpoint for generator power and allows selection ofgenerator or main line power to the building. Thiswill prevent the generator from charging the mainpower line (backfeeding) when the main powersupply has failed or has been turned off for linerepair. Backfeeding can electrocute or injure linemaintenance personnel. Also, generator and build-ing electrical system damage can occur when nor-mal operating power returns if unit is used withoutan isolation switch.

AE00086

EXTENSION CORD NOTES9 When using an extension cord, its total length

should not exceed60 meters for cross section of 1.5 mm squareand100 meters for cross section of 2.5 mm square.

9 This extension cord should be protected by atough flexible rubber sheath (IEC 245) or theequivalent to withstand mechanical stresses.

741-040a

q

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q

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EF1600/EF2600

YG2600

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793-017

AE00101

CONTROL FUNCTION

AE00102

DESCRIPTION 1 Fuel tank2 Fuel tank cap3 Fuel cock4 Air filter cover5 Spark plug6 Muffler7 Choke lever8 Ground (Earth) terminal9 Oil filler cap0 Oil drain plugq Recoil starterw Fuel level gaugee Carrying handles (shaded)

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AE00104

CONTROL BOX1 Engine switch2 Oil warning light3 Pilot light (YG2600)4 Voltage meter

(EF1600/EF2600)5 AC switch (N.F.B.)6 AC receptacle7 G.F.C.I. receptacle

EF1600

EF2600

YG2600

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r

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793-018

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y

w

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793-019

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y

w

e

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793-020

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yu

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700-027c

w763-086c

OFF

ON

763-084f

q

w

q

763-095

OFF

ON

AE00111

OIL WARNING SYSTEMWhen the oil level falls below the lower level, theengine stops automatically. Unless you refill with oil,the engine will not start again.

NOTE:If the engine stalls or does not start, turn the engineswitch to "ON" position and then pull the recoil starter.If the oil warning light flickers for a few seconds, theengine oil is insufficient. Add oil and restart.

AE00122

ENGINE SWITCHThe engine switch controls the ignition system.1 7 “ON”Ignition circuit is switched on.The engine can be started.2 5 “STOP”Ignition circuit is switched off.The engine will not run.

AE00131

AC SWITCH (N.F.B.)The AC switch (Non-Fuse Breaker) turns off automati-cally when the load exceeds the generator rated out-put.

1 I “ON”2 3 “OFF”

cCReduce the load to the specified generator ratedoutput if the AC switch (N.F.B.) turns off. If it turnsoff again, consult your Yamaha dealer.

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w763-083

763-060

AE00848

G.F.C.I. RECEPTACLE(for YG2600)The G.F.C.I. (Ground Fault Circuit Interrupter) 1 shutsoff power to the protected receptacles if a ground fault(electrical leak) is detected.If the reset button 2 pops out 3, the equipmentplugged into the receptacle may be faulty. If this hap-pens, check the equipment carefully. If the equipmentappears to be in good condition, press the reset buttonfirmly until a click is heard. This will restore power. Ifthe reset button pops out again, unplug the equipmentimmediately. Have the equipment inspected andrepaired by a qualified repairperson before attemptingto use it again.

wTO REDUCE THE CHANCE OF ELECTRICALSHOCK:9 Do not attempt to operate equipment if the

ground fault circuit interrupter reset buttonpops out repeatedly during use.

9 Test the ground fault circuit interrupter duringthe pre-operation checks according to themaintenance instructions on page 25.

9 Remember that only receptacles labeled“Ground Fault Protected” have ground faultcircuit interrupter protection.

1

3

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741-001

707-033a

q

707-001

707-037

707-051

AE00845

PRE-OPERATION CHECK

NOTE:Pre-operation checks should be made each time thegenerator is used.

wThe engine and muffler will be very hot after theengine has been run.Avoid touching the engine and muffler while theyare still hot with any part of your body or clothingduring inspection or repair.

AE00856

FUELMake sure there is sufficient fuel in the tank.

Your Yamaha engine has been designed to use regu-lar unleaded gasoline with a pump octane number ((R+ M)/2) of 86 or higher, or research octane number of91 or higher.1 Fuel level gauge

w9 Fuel is highly flammable and poisonous.

Check “SAFETY INFORMATION” (See page 5)carefully before refueling.

9 Do not fill above the top of the fuel filter or itmay overflow when the fuel heats up later andexpands.

9 Wipe up any spilled fuel immediately.9 After refueling, make sure the tank cap is tight-

ened securely.

Recommended fuel: Unleaded gasoline

Fuel tank capacity:Total:

EF1600/EF260012.0 L (2.64 Imp gal, 3.17 US gal)

YG260019.0 L (4.18 Imp gal, 5.02 US gal)

“F” Full“E” Empty

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700-068

700-110

q

700-065

0°C 25°C

80°F32°F

A YAMALUBE 4(10W-30)

D SAE 10W C SAE #20 B SAE #30

700-006

741-029a

AE00222

ENGINE OILMake sure the engine oil is at the upper level of the oilfiller hole.Add oil as necessary.

1 Upper level

NOTE:Recommended engine oil classification:API Service “SE” or “SF”.

cCThe generator has been shipped without engineoil. Fill with oil or it will not start.

AE00241

GROUND (Earth)Make sure to ground (earth) the generator.Check "SAFETY INFORMATION" on page 6.

Recommended oil:å YAMALUBE 4 (10W-30) or SAE 10W-30

type SE motor oil∫ SAE #30ç SAE #20∂ SAE 10W

Engine oil quantity:0.6 L (0.53 lmp qt, 0.63 US qt)

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761-027

q

763-086e

OFF

ON

705-037q

763-084h

q

701-025a

q

AE00955

OPERATION

NOTE:The generator has been shipped without engine oil.Fill with oil or it will not start.

1 Upper level

AE00854

STARTING THE ENGINE

NOTE:9 Before starting the engine, do not connect any

electric devices.9 Turn the AC switch (N.F.B.) to the “OFF” position.

1 3 “OFF”

1. Turn the fuel cock lever to the “ON” position.

1 “ON”

2. Turn the engine switch to the “ON” position.

1 7 “ON”

3. Turn the choke lever to the “1” position.

1 Choke lever

NOTE:The choke is not required to start a warm engine. Turn the choke lever to the operating position.

700-006a

q

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4. Pull slowly on the recoil starter until it is engaged,then pull it briskly.

5. After the engine starts, warm up the engine untilthe engine does not stop when the choke lever isreturned to the operating position.

6. Turn the choke lever back to the operating posi-tion.

1 Operating position

704-010

701-025

q

NOTE:9 “–” means below.9 Application wattage indicates when each appara-

tus is used by itself.

cCBe sure the total load is within generator rated out-put otherwise generator damage will occur.

NOTE:Some precision equipment is voltage sensitive andmay require a more uniform voltage supply thanportable generators provide. Examples include somemedical equipment, personal computers, and someinverters that sense peak and RMS voltage values.Consult the precision-equipment vendor before relyingon any portable generator to provide power to suchequipment.

AE00343

APPLICATION RANGE

AC

Power factor 1 0.8–0.950.4–0.75

(Efficiency 0.85)

EF1600 –1,400W –1,120W –480W

EF2600YG2600

–2,300W –1,840W –780W

779-006a 779-006c 779-006b

7NJ-9-12A 10/27/03 10:21 AM Page 15

– 16 –

AE00851

CONNECTION

Alternating Current (AC)

cC9 Be sure all electric devices including the lines

and plug connections are in good conditionbefore connection to the generator.

9 Be sure any electric devices are turned offbefore plugging it in.

9 Be sure the total load is within generator ratedoutput.

9 Be sure the receptacle load current is withinreceptacle rated current.

1. Wind the power lead 2 or 3 turns around frame.

å EF1600/EF2600∫ YG2600

2. Start the engine.

761-028

q

763-095

OFF

ON

3. Plug into AC receptacle.

4. Make sure the voltage meter indicates the ratedvoltage (for EF1600/EF2600) or the pilot light is on(for YG2600).

å Voltage meter∫ Pilot light

5. Turn the AC switch (N.F.B.) to the “ON” positionand turn on any electric devices.

1 I “ON”

cCReduce the load to the specified generator ratedoutput if an AC switch turns off. If it turns offagain, consult a Yamaha dealer.

761-029

A B

779-028

A B

7NJ-9-12A 10/27/03 10:21 AM Page 16

– 17 –

763-085e

q

705-038

q

AE00852

STOPPING THE ENGINENOTE:9 Turn off any electric devices.9 Turn the AC switch (N.F.B.) to the “OFF” position.

2. Turn the engine switch to the “STOP” position.

1 5 “STOP”

3. Turn the fuel cock lever to “OFF”.

1 “OFF”

q763-094a

1 3 “OFF”

1. Disconnect any electric devices.

7NJ-9-12A 10/27/03 10:21 AM Page 17

– 18 –

* : It is recommended that these items be serviced by a Yamaha dealer.** : Related to emission control system.

AE00401

PERIODIC MAINTENANCE

AE00403

MAINTENANCE CHARTRegular maintenance is most important for best performance and safe operation.

wStop the engine before starting maintenance work.

No. Item Remarks

Pre-Ope-rationcheck(daily)

Initial Every

1month

or 20 Hr

3monthsor 50 Hr

6months

or 100 Hr

12months

or 300 Hr

Check condition.

1. ** Adjust gap and0Spark Plug

clean. Replace ifnecessary.

**Check and adjust

2.* Valve Clearance when engine is 0

cold.

Check breather** hose for cracks or

03.* Crankcasedamage. Replacebreather systemif necessary.

4.* ** Check and adjust0Idle speed

engine idle speed.

Check for leakage.Retighten or

0

***replace gasket

5. Exhaust Systemif necessary.

Check mufflerscreen and sparkarrester. Clean/ 0

replace ifnecessary.

Check oil level 06. Engine Oil

Replace 0 0

** Clean.7. Air Filter Replace if 0

necessary.

7NJ-9-12B 10/27/03 9:59 AM Page 18

– 19 –

* : It is recommended that these items be serviced by a Yamaha dealer.** : Related to emission control system.

cCUse only Yamaha specified genuine parts for replacement. Ask an authorizedYamaha dealer for further attention.

Clean fuel cock

8. Fuel Filterand fuel tank

0filter. Replace ifnecessary.

Check fuel hose

9. Fuel Linefor crack or da-

0mage. *Replaceif necessary.

10. ** Check choke0Choke lever

operation.

11. Cooling SystemCheck for fan

0damage.

12. Starting SystemCheck recoil

0starter operation.

13.* ** More frequently0Decarbonization

if necessary.

Check the voltagemeter (for EF1600/

14. Generation EF2600) or pilot 0

light comes on(for YG2600).

Check operation.15. G.F.C.I. receptacle *Repair if 0

necessary.

Check all fittings

16.*Fittings/ and fasteners.

0Fasteners Correct if

necessary.

No. Item Remarks

Pre-Ope-rationcheck(daily)

Initial Every

1month

or 20 Hr

3monthsor 50 Hr

6months

or 100 Hr

12months

or 300 Hr

7NJ-9-12B 10/27/03 9:59 AM Page 19

– 20 –

760-005a

a

760-001a

AE00423

SPARK PLUG INSPECTIONYou should periodically remove and inspect the sparkplug.1. Check for discoloration and remove the carbon.

2. Check the spark plug type and gap.

a Gap

3. Install the spark plug.

AE00431

CARBURETOR ADJUSTMENTThe carburetor is a vital part of the engine. Adjustingshould be left to a Yamaha dealer with the profession-al knowledge, specialized data, and equipment to doso properly.

Standard electrode color:Tan Color

Standard Spark Plug:BPR4ES (NGK)

Spark Plug Gap:0.7–0.8 mm (0.028–0.031 in)

Spark Plug Torque:20 N•m (2 kgf•m, 14 lbf•ft)

7NJ-9-12B 10/27/03 9:59 AM Page 20

– 21 –

q

e

700-067

w

700-006a

q

700-065

0°C 25°C

80°F32°F

A YAMALUBE 4(10W-30)

D SAE 10W C SAE #20 B SAE #30

AE00412

ENGINE OIL REPLACEMENT1. Place the machine on a level surface and warm

up the engine for several minutes.Then stop the engine.

2. Remove the oil filler cap.3. Place an oil pan under the engine. Remove the oil

drain plug so that the oil can be completelydrained.

4. Check the drain plug, gasket, oil filler cap and O-ring.If damaged, replace.

1 Oil drain plug2 Gasket3 O-ring

5. Reinstall the oil drain plug.

Drain Plug Torque:17 N•m (1.7 kgf•m, 12 lbf•ft)

6. Add engine oil to the upper level.

1 Upper level

NOTE:Recommended engine oil classification:API Service “SE” or “SF”.

cCBe sure no foreign material enters the crankcase.

Recommended oil:å YAMALUBE 4 (10W-30) or SAE 10W-30

type SE motor oil∫ SAE #30ç SAE #20∂ SAE 10W

Engine oil quantity:0.6 L (0.53 Imp qt, 0.63 US qt)

7NJ-9-12B 10/27/03 9:59 AM Page 21

– 22 –

710-037a

AE00451

AIR FILTER1. Remove the air filter cover and element.2. Wash the element in solvent and dry.3. Oil the element and squeeze out excess oil.

The element should be wet but not dripping.

cCDo not wring out the element.This could cause it to tear.

4. Insert the element into the air filter.

NOTE:Be sure the element sealing surface matches the airfilter so there is no air leak.

cCThe engine should never run without the element;excessive piston and cylinder wear may result.

wNever use solvent while smoking or in the vicinityof an open flame.

Recommended oil:Foam-air-filter oil

orSAE #20 motor oil

7NJ-9-12B 10/27/03 9:59 AM Page 22

– 23 –

A B

A B

A B

705-067

707-043b

q

AE00855

FUEL COCK

wNever use or be near fuel and solvent while smok-ing or in the vicinity of an open flame.

1. Stop the engine.2. Turn the fuel cock lever to “OFF”.3. Remove the fuel cock cup and gasket.4. Clean the cup with solvent and wipe it off.5. Check the gasket. Replace it if damaged.6. Reinstall the gasket and fuel cock cup.

wBe sure the fuel cock cup is tightened securely.

å EF1600/EF2600∫ YG2600

AE00471

FUEL TANK FILTER1. Remove the fuel tank cap and filter.

1 Filter

2. Clean the filter with solvent. If damaged, replace.3. Wipe the filter and insert it.

wBe sure the tank cap is tightened securely.

7NJ-9-12B 10/27/03 9:59 AM Page 23

– 24 –

741-001

q

w711-015

711-012b

711-012a

q

711-022

711-050

AE00853

MUFFLER SCREEN AND SPARK ARRESTER

wThe engine and muffler will be very hot after theengine has been run.Avoid touching the engine and muffler while theyare still hot with any part of your body or clothingduring inspection or repair.

1. Remove the muffler screen.

1 Muffler screen2 Screw

2. Use a flathead screw driver to pry the sparkarrester out from the muffler.

3. Remove the spark arrester.

1 Spark arrester

4. Remove the carbon deposits on the mufflerscreen and spark arrester using a wire brush.

cCWhen cleaning, use the wire brush lightly to avoiddamaging or scratching of the muffler screen andspark arrester.

5. Check the muffler screen and spark arrester.Replace them if damaged.

7NJ-9-12B 10/27/03 9:59 AM Page 24

– 25 –

711-012a

q

711-017a

763-083a

w q

6. Install the spark arrester.

NOTE:Align the spark arrester projection with the hole in themuffler pipe.

1 Projection2 Hole

7. Install the muffler screen.

AE00501

G.F.C.I. RECEPTACLE TEST(YG2600)1. Start the engine.2. Turn the AC switch (N.F.B.) to the “ON” position.3. Press the test button 1, then check the position of

the reset button 2.

4. If G.F.C.I. operation is correct, push in the resetbutton.If the G.F.C.I. operates incorrectly, consult aYamaha dealer.

wDo not operate the generator with a faulty G.F.C.I.circuit. Electric shock could occur. Have the gen-erator repaired by a qualified mechanic.

G.F.C.I. Reset G.F.C.I. Receptacle Button Position Operation

after Test

Pop Out 3 Correct

Stay In 4 Incorrect

763-059

3 4

7NJ-9-12B 10/27/03 9:59 AM Page 25

– 26 –

707-001

705-037a

700-006

763-084i

760-009

AE00512

TROUBLESHOOTING

Engine won’t start1. Fuel systems

No fuel supplied to combustion chamber.2 No fuel in tank .... Supply fuel.2 Clogged fuel line .... Clean fuel line.2 Foreign matter in fuel cock .... Clean fuel cock.2 Clogged carburetor .... Clean carburetor.

2. Engine oil systemInsufficient

2 Oil level is low .... Add engine oil.

3. Electrical systems2 Engine switch to “ON”.

Poor spark2 Spark plug dirty with carbon or wet .... Remove

carbon or wipe spark plug dry.2 Faulty ignition system .... Consult dealer.4. Compression

Insufficient2 Worn out piston and cylinder .... Consult dealer.2 Loose cylinder head nuts .... Tighten nuts proper-

ly.2 Damaged gasket .... Replace gasket.

7NJ-9-12B 10/27/03 9:59 AM Page 26

– 27 –

P OK

O Clogged

Engine does notstart.

C Does not flicker D Flickers

B

AE00515

A ENGINE DOES NOT START

Turn the engine switch to “ON”, then pullthe recoil starter and check if the oilwarning light flickers.

791-001e

H Pull the recoil starter and check thespark plug for spark strength.(See “WARNING”)

791-001b

w9 To prevent FIRE HAZARDS be

sure fuel is not present in thespark plug area.

9 To prevent FIRE HAZARDS besure to place the spark plug asfar way as possible from thespark plug hole and carburetorarea.

9 To prevent ELECTRIC SHOCK donot hold spark plug lead withhand while testing.

Engine starts.I J

Check the following9 Fuel cock clogging9 Air cleaner element

clogging.

N Clean or Replace; Consult a Yamaha dealer.

Q

R Consult a Yamaha dealer.

K Check the spark plug.9 Type:9 Gap:

L Incorrect M OKReplace orAdjust Gap.

Clean the sparkplug.

E Check engine oil level.

F OK G Level lowConsult a Yamaha dealer.

Add engine oil.

791-001d

791-001c

7NJ-9-12B 10/27/03 9:59 AM Page 27

– 28 –

707-038

q

w

a

e r

712-010

AE00601

STORAGELong term storage of your machine will require somepreventive procedures to guard against deterioration.

AE00611

DRAIN THE FUEL1. Drain the fuel tank, fuel cock, and carburetor float

bowl.

a Carburetor drain plug

2. Pour a cup of SAE 10W30 or 20W40 motor oil intothe tank.

3. Shake the tank to coat the inner surfaces thor-oughly.

4. Drain off the excess oil.

AE00621

ENGINE1. Remove the spark plug, pour about one table-

spoon of SAE 10W30 or 20W40 motor oil into thespark plug hole and reinstall the spark plug. Recoilstart the engine by turning over several times (withignition off) to coat the cylinder walls with oil.

2. Pull the recoil starter until you feel compression.Then stop pulling. (This prevents the cylinder andvalves from rusting).

3. Clean exterior of the generator and apply a rustinhibitor.

4. Store the generator in a dry, well-ventilated place,with the cover placed over it.

5. The generator must remain in a vertical positionwhen stored, carried or operated.

7NJ-9-12B 10/27/03 9:59 AM Page 28

– 29 –

AE00789

EXHAUST EMISSION CONTROL SYSTEMAND COMPONENTS

Item Acronym9 CARB. ASSY., LH. & JT., .............................CARB (Carburetor)

CARBURETOR29 T.C.I. MAGNETO ASSY. & ..........................EI (Electronic Ignition)

PLUG, SPARK9 CRANKCASE1 & HEAD, ..............................PCV (Positive Crankcase

CYLINDER1 Ventilation)9 AIR FILTER ASSY. .......................................ACL (Air Cleaner)9 MUFF., 2, CAP, NET, WIRE2 &

ARRESTER, SPARK

The above items and the corresponding acronyms are provided in accordance with U.S.EPA REGULATIONS FOR NEW NONROAD SPARK-IGNITION NONHANDHELDENGINES and the CALIFORNIA REGULATIONS FOR 1995 AND LATER SMALL OFF-ROAD ENGINES.The acronyms conform to the latest version of the SAE’s recommended practice docu-ment J1930, “Diagnostic Acronyms, Terms, and Definitions For Electrical/ElectronicSystem”.

It is recommended that these items be serviced by a Yamaha dealer.

7NJ-9-12B 10/27/03 9:59 AM Page 29

– 30 –

AE00701

SPECIFICATIONSAE00702

DIMENSIONS

AE00704

ENGINE

AE00707

GENERATOR

Unit EF1600 EF2600 YG2600Type Forced air cooled 4-stroke gasoline OHVCylinder Arrangement Inclined, 1 cylinderDisplacement cm3 123 171 171

Bore × Stroke mm 56.0 × 50.0 66.0 × 50.0 66.0 × 50.0(in) (2.20 × 1.97) (2.60 × 1.97) (2.60 × 1.97)

Rated Output kW(HP) r/min 2.0 (2.7)/3,600 3.3 (4.4)/3,600 3.3 (4.4)/3,600Operation Hours Hr 13.5 9.0 14.0Fuel Unleaded gasolineFuel Tank Capacity L (Imp gal, US gal) 12.0 (2.64, 3.17) 12.0 (2.64, 3.17) 19.0 (4.18, 5.02)Engine Oil Quantity L (Imp qt, US qt) 0.6 (0.53, 0.63) 0.6 (0.53, 0.63) 0.6 (0.53, 0.63)Ignition System TCI

Spark Plug: Type BPR4ES (NGK)Spark Plug: Gap

mm (in)0.7–0.8 (0.028–0.031)

Noise Level* dB (A) 65 67 67

Unit EF1600 EF2600 YG2600AC Output

Rated Voltage V 120 120 120Rated frequency Hz 60 60 60Rated current A 11.7 19.2 19.2Rated Output kVA 1.4 2.3 2.3Safety Device: Type NFB

Unit EF1600 EF2600 YG2600Overall Length mm (in) 510 (20.1) 510 (20.1) 593 (23.3)Overall Width mm (in) 415 (16.3) 415 (16.3) 487 (19.2)Overall Height mm (in) 425 (16.7) 425 (16.7) 534 (21.0)Dry Weight kg (lb) 38 (83.8) 41 (90.4) 46.5 (102.5)

* : Measured at rated operation from 7 m (23 ft) distance.

7NJ-9-12B 10/27/03 9:59 AM Page 30

– 31 –

AE00751

WIRING DIAGRAM

Generator assembly Control box

1(for EF1600)Frame earth

Engine(For EF1600)

1

2

w

4

3 3

q5

6

8

37

9

0

G/YG

G

G

G

G

G

G

G

R

BrBr

G

G

G/Y

G/Y

B/W

B/W

L

Y

B/WL Y B B/W B

B

G/Y

R

R

Br

R

Br

R

Br

770-007

Br

G/Y

R

V

1 Rotor assembly2 Stator assembly3 AC receptacle4 AC switch (N.F.B.)5 Engine switch6 Condenser7 Oil level switch8 Oil warning unit9 T.C.I. unit0 Spark plugq Gound (earth) terminalw Voltage meter

Color codeB BlackBr BrownG GreenL BlueR RedG/Y Green/YellowB/W Black/White

EF1600/EF2600

7NJ-9-12B 10/27/03 9:59 AM Page 31

– 32 –

YG2600

q

wr

e e

u

i

y

t

o

!0

!2

!1

Generator assembly

Frame earth

Engine

Control box

G/YG/YG/YG

G

G

G

G

G

G

G

G/Y

G/Y

R

BrBr

G

G

G/Y

G/Y

B/W

B/W

L

Y

B/WLY B B/W B

B

G/YG/Y

G/Y

R

Br

R

Br

R

Br

R

Br

770-008

1 Rotor assembly2 Stator assembly3 AC receptacle4 AC switch (N.F.B.)5 Engine switch6 Condenser7 Oil level switch8 Oil warning unit9 T.C.I. unit0 Spark plugq Gound (earth) terminalw Pilot light

Color codeB BlackBr BrownG GreenL BlueR RedG/Y Green/YellowB/W Black/White

7NJ-9-12B 10/27/03 9:59 AM Page 32

– 33 –

AE00795

ENGINE HANGER INSTALLATION (for YG2600)

794-001

7NJ-9-12B 10/27/03 9:59 AM Page 33

Generator

LIT-19626-01-14 7NJ-28199-12PRINTED ON RECYCLED PAPERPRINTED IN JAPAN03 908 – 0.4 × 1 !

EF1600EF2600

YG2600

OWNER’S MANUAL

7NJ-9-12 Hyoshi 10/27/03 9:03 AM Page 1