Yamaha Portable Generator EF1000iS User Manual

Generator  
OWNER’S MANUAL  
EF1000iS  
LIT-19626-01-19  
7CG-28199-10  
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AE00002  
INTRODUCTION  
Congratulations on your purchase of your new Yamaha.  
This manual will provide you with a good basic understanding of the operation and  
maintenance of this machine.  
If you have any questions regarding the operation or maintenance of your machine,  
please consult a Yamaha dealer.  
AE00012  
PRI-I.D. NUMBER  
IDENTIFICATION NUMBER RECORDS  
Record your Primary I.D., and serial num-  
bers in the spaces provided, to assist you  
MODEL  
in ordering spare parts from a Yamaha  
dealer.  
PRI-I.D.  
Also record and keep these I.D. numbers  
in a separate place in case your machine  
is stolen.  
SERIAL No.  
CODE  
AE00011  
MACHINE IDENTIFICATION  
The machine serial number is stamped in  
the location as shown.  
NOTE:  
The first three digits of these numbers are  
for model identification; the remaining dig-  
its are the unit production number. Keep a  
record of these numbers for reference  
when ordering parts from a Yamaha deal-  
er.  
7CG-24163-00  
790-065b  
AE00022  
EF1000iS  
OWNER’S MANUAL  
© 2004 by Yamaha Motor Corporation, U.S.A.  
1st Edition, March 2004  
All rights reserved.  
Any reprinting or unauthorized use  
without the written permission of  
Yamaha Motor Corporation, U.S.A.  
is expressly prohibited.  
Printed in Japan.  
P/N LIT-19626-01-19  
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AE00032  
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PLEASE READ AND UNDERSTAND  
THIS MANUAL COMPLETELY BEFORE  
OPERATING THE MACHINE.  
Particularly important information is distin-  
guished in this manual by the following  
notations.  
NOTE:  
9 Yamaha continually seeks advance-  
ments in product design and quality.  
Therefore, while this manual contains  
the most current product information  
available at the time of printing, there  
may be minor discrepancies between  
your engine and this manual. If there  
is any question concerning this manu-  
al, please consult your Yamaha deal-  
er.  
-
The Safety Alert Symbol means ATTEN-  
TION! BECOME ALERT! YOUR SAFETY  
IS INVOLVED!  
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Failure to follow WARNING instructions  
could result in severe injury or death to  
the engine operator, a bystander, or a  
person inspecting or repairing the engine.  
9 This manual should be considered a  
permanent part of this engine and  
should remain with this engine when  
resold.  
cC  
A CAUTION indicates special precautions  
that must be taken to avoid damage to the  
engine.  
NOTE:  
A NOTE provides key information to make  
procedures easier or clearer.  
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AE00041  
CONTENTS  
LIMITED WARRANTY (EF- AND  
EDL-SERIES)..........................................1  
SPARK PLUG INSPECTION.............22  
CARBURETOR ADJUSTMENT.........22  
ENGINE OIL REPLACEMENT ..........23  
LOCATION OF IMPORTANT LABELS..3  
SAFETY INFORMATION........................4  
EXHAUST FUMES ARE  
MUFFLER SCREEN AND SPARK  
ARRESTER .......................................24  
POISONOUS .......................................4  
AIR FILTER........................................26  
FUEL TANK FILTER..........................27  
TROUBLESHOOTING..........................28  
STORAGE.............................................30  
DRAIN THE FUEL .............................30  
ENGINE .............................................30  
FUEL IS HIGHLY FLAMMABLE AND  
POISONOUS .......................................4  
ENGINE AND MUFFLER MAY  
BE HOT................................................4  
ELECTRIC SHOCK PREVENTION.....5  
CONNECTION NOTES .......................6  
CONNECTION.....................................6  
EXTENSION CORD NOTES ...............6  
CONTROL FUNCTION...........................7  
DESCRIPTION ....................................7  
CONTROL PANEL...............................7  
OIL WARNING SYSTEM.....................8  
ENGINE SWITCH................................8  
ECONOMY CONTROL SWITCH.........8  
DC PROTECTOR ................................9  
FUEL TANK CAP AIR VENT KNOB....9  
FUEL COCK KNOB .............................9  
PRE-OPERATION CHECK...................10  
FUEL..................................................10  
ENGINE OIL ......................................11  
GROUND (Earth)...............................11  
OPERATION.........................................12  
STARTING THE ENGINE..................12  
APPLICATION RANGE .....................14  
CONNECTION...................................15  
STOPPING THE ENGINE .................19  
PERIODIC MAINTENANCE .................20  
MAINTENANCE CHART ...................20  
EXHAUST EMISSION CONTROL  
SYSTEM AND COMPONENTS............31  
SPECIFICATIONS ................................32  
DIMENSIONS ....................................32  
ENGINE .............................................32  
GENERATOR ....................................32  
WIRING DIAGRAM...............................33  
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AE01120  
YAMAHA MOTOR CORPORATION U.S.A.  
EF- AND EDL-SERIES GENERATOR LIMITED WARRANTY  
Yamaha Motor Corporation, U.S.A. hereby war-  
rants that new Yamaha consumer generators pur-  
chased from an authorized Yamaha consumer  
generator dealer in the continental United States  
will be free from defects in material and workman-  
ship for the period of time stated herein, subject to  
certain stated limitations.  
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 time  
for inspection and repairs at such dealer’s  
place of business.  
WARRANTY TRANSFER: To transfer the warran-  
ty from the original purchaser to any subsequent  
purchaser(s), it is imperative that the unit be  
inspected and registered for warranty by an autho-  
rized Yamaha consumer generator dealer. In order  
for this warranty to remain in effect, this inspection  
and registration must take place within ten (10)  
days after transfer. An inspection and registration  
fee will be charged for this service. In no case will  
the warranty be extended beyond the original peri-  
od.  
THE PERIOD OF WARRANTY Any new EF-  
series or EDL-series Yamaha Generator pur-  
chased for private, non-commercial use from an  
authorized Yamaha consumer generator dealer in  
the continental United States will  
be warranted against defects in material or work-  
manship for a period two (2) years from date of  
purchase, subject to exclusions noted herein. Any  
Yamaha non-commercial  
generator purchased and utilized for commercial  
or rental applications will be warranted for a period  
one (1) year from the date of purchase, subject to  
exclusions noted herein.  
YAMAHA MOTOR CORPORATION, U.S.A. MAKES  
NO OTHER WARRANTY OF ANY KIND,  
EXPRESSED OR IMPLIED. ALL IMPLIED WAR-  
RANTIES OF MERCHANTABILITY AND FITNESS  
FOR A PARTICULAR PURPOSE WHICH EXCEED  
THE OBLIGATIONS AND TIME LIMITS STATED IN  
THIS WARRANTY ARE HEREBY DISCLAIMED BY  
YAMAHA MOTOR CORPORATION, U.S.A. AND  
EXCLUDED FROM THIS WARRANTY.  
DURING THE PERIOD OF WARRANTY any  
authorized Yamaha consumer generator dealer  
will, free of charge, repair or replace, at Yamaha’s  
option, any part adjudged defective by Yamaha  
due to faulty workmanship or material from the  
factory. Parts used in warranty repairs will be war-  
ranted for the balance of the product’s warranty  
period. All parts replaced under warranty become  
property of Yamaha Motor Corporation U.S.A.  
SOME STATES DO NOT ALLOW LIMITATIONS ON  
HOW LONG AN IMPLIED WARRANTY LASTS, SO  
THE ABOVE LIMITATION MAY NOT APPLY TO  
YOU. ALSO EXCLUDED FROM THIS WARRANTY  
ARE ANY INCIDENTAL OR CONSEQUENTIAL  
DAMAGES INCLUDING LOSS OF USE. SOME  
STATES DO NOT ALLOW THE EXCLUSION OR  
LIMITATION OF INCIDENTAL OR CONSEQUEN-  
TIAL DAMAGES, SO THE ABOVE EXCLUSION  
MAY NOT APPLY TO YOU.  
GENERAL EXCLUSIONS from this warranty shall  
include any failures caused by:  
a. Installation of parts or accessories that are not  
qualitatively equivalent to genuine Yamaha  
parts.  
b. Abnormal strain, neglect, or abuse.  
c. Lack of proper maintenance.  
d. Accident or collision damage.  
THIS WARRANTY GIVES YOU SPECIFIC LEGAL  
RIGHTS, AND YOU MAY ALSO HAVE OTHER  
RIGHTS WHICH VARY FROM STATE TO STATE.  
SPECIFIC EXCLUSIONS from this warranty shall  
include parts replaced due to normal wear or rou-  
tine maintenance.  
YAMAHA MOTOR CORPORATION, U.S.A.  
Post Office Box 6555  
THE CUSTOMER’S RESPONSIBILITY under this  
warranty shall be to:  
Cypress, California 90630  
1. Operate and maintain the generator as speci-  
fied in the appropriate Owner’s Manual;  
– 1 –  
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WARRANTY QUESTIONS AND ANSWERS  
Q. What costs are my responsibility during the  
Q. Is the warranty transferable to second own-  
warranty period?  
ers?  
A. The customer’s responsibility includes all  
costs of normal maintenance service, non-  
warranty repairs, accident damages, as well  
as oil and spark plugs.  
A. Yes. The remainder of the existing warranty  
can be transfered upon request.  
The unit has to be inspected and reregistered  
by an authorized Yamaha generator dealer for  
the policy to remain effective.  
Q. What are some examples of “abnormal” strain,  
neglect, or abuse?  
CUSTOMER SERVICE  
A. These terms are general and overlap each  
other in areas. Specific examples include:  
Running the machine out of oil; lack of proper  
maintenance; operating the machine with a  
broken or damaged part which causes anoth-  
er part to fail; and so on. If you have any  
specific questions on operation or mainte-  
nance, please contact your dealer for advice.  
If your machine requires warranty service, you  
must take it to any authorized Yamaha generator  
dealer within the continental United States. Be  
sure to bring your warranty registration identifica-  
tion or other valid proof of the original date of pur-  
chase. If a question or problem arises regarding  
warranty, 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 help  
you. If you are still not satisfied and require addi-  
tional assistance, please write:  
Q. Does the warranty cover incidental costs such  
as transportation due to a failure?  
A. No. The warranty is limited to repair of the  
machine itself.  
YAMAHA MOTOR CORPORATION U.S.A.  
CUSTOMER RELATIONS DEPARTMENT  
P.O. BOX 6555  
Q. May I perform any or all of the recommended  
maintenance shown in the Owner’s Manual  
instead of having the dealer do them?  
Cypress, California 90630  
A. Yes, if you are a qualified mechanic and follow  
the procedures specified in the Owner’s and  
Service Manual. We do recommend, however,  
that items requiring special tools or equipment  
be done by a Yamaha generator dealer.  
CHANGE OF ADDRESS  
The federal government requires each manufac-  
turer to maintain a complete, up-to-date list of all  
first purchasers against the possibility of a safety-  
related defect and recall. This list is compiled from  
the purchase registrations sent to Yamaha Motor  
Corporation, U.S.A. by the selling dealer at the  
time of your purchase. If you should move after  
you have purchased your new generator, please  
advise us of your new address by sending a post-  
card listing your Yamaha model name, engine  
number, dealer number (or dealer’s name) as it is  
shown on your warranty identification, your name  
and new mailing address. Mail to:  
Q. Will the warranty be void or cancelled if I do  
not operate or maintain my new Yamaha  
exactly as specified in the Owner’s Manual?  
A. No. The warranty on a new Yamaha cannot  
be “voided” or “cancelled.”  
However, if a particular failure is caused by  
operation or maintenance other than as  
shown in the Owner’s Manual, that failure  
may not be covered under warranty.  
Q. What responsibility does my dealer have  
under this warranty?  
A. Each Yamaha generator dealer is expected  
to:  
YAMAHA MOTOR CORPORATION, U.S.A.  
WARRANTY DEPARTMENT  
P.O. Box 6555  
1. Check the operation of the generator  
before sale.  
Cypress, California 90630  
2. Explain the operation, maintenance, and  
warranty requirements to your satisfaction  
at the time of sale, and upon your request  
at any later date.  
This will ensure that Yamaha Motor Corporation,  
U.S.A. has an up-to-date registration record in  
accordance with federal law.  
In addition, each Yamaha generator dealer is  
held responsible for his setup, service and  
warranty repair work.  
– 2 –  
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AE00062  
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LOCATION OF IMPORTANT LABELS  
Please read the following labels carefully before oper-  
ating this machine.  
NOTE:  
Maintain or replace safety and instruction labels, as  
necessary.  
1
q
WARNING  
8READ THE OWNERS MANUAL AND ALL LABELS BEFORE OPERATING.  
792-050  
8ONLY OPERATE IN WELL-VENTILATED AREAS.  
EXHAUST GAS CONTAINS POISONOUS CARBON MONOXIDE.  
8CHECK FOR SPILLED FUEL OR FUEL LEAKS.  
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8STOP ENGINE BEFORE REFUELING.  
8DO NOT OPERATE NEAR FLAMMABLE MATERIALS.  
8ELECTROCUTION CAN OCCUR IF GENERATOR IS USED IN RAIN, SNOW,  
OR NEAR WATER.  
KEEP THIS UNIT DRY AT ALL TIMES.  
8ELECTROCUTION OR PROPERTY DAMAGE CAN OCCUR.  
DO NOT CONNECT THIS GENERATOR TO ANY BUILDINGS ELECTRICAL  
SYSTEM UNLESS AN ISOLATION SWITCH HAS BEEN INSTALLED BY A  
LICENSED ELECTRICIAN. REFER TO THE OWNERS MANUAL.  
7VV-24162-10  
3
6
792-051d  
STARTING INSTRUCTION  
8
Disconnect all  
electrical devices.  
Turn ECON. switch to OFF  
Open fuel cap vent  
HOT EXHAUST  
8
8
7VV-28176-10  
2
zzzzzz  
zz  
8
Turn fuel knob ON  
AC output  
Rated  
Hz  
VA  
V
OIL  
zzz  
8
Turn engine switch to ON  
Pull choke knob out  
Pull recoil starter  
zzz  
5
8
Phase  
DC output  
Fuel  
Single  
zz  
z
V
A
8
8
Gasoline  
Push choke knob in  
YAMAHA MOTOR CO., LTD  
MADE IN JAPAN  
7CG-25134-10  
7VV-24164-10  
4
(
)
IMPORTANT ENGINE INFORMATION  
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ENGINE AIR INDEX C a l i f o r n i a o n l  
ENGINE FAMILY : zzzzzzzzzzzz  
E M  
REFER TO OWNER'S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.  
MOST 0C L E A N  
N O T E  
T H I S E N G I N E  
F O R T H E F O L L O W I N G U S E :  
2
4
6
8
LEAS1T 0  
DISPLACEMENT  
IGNITION TIMING  
IDLE SPEED  
FUEL  
ENGINE OIL  
THIS ENGINE MEETS zzzz-zzzz CALIFORNIA EMISSION REGULATIONS FOR SMALL OFF-ROAD ENGINES.  
THIS ENGINE CONFORMS TO PHASE U.S.EPA REGULATIONS FOR SMALL NONROAD ENGINES.  
EMISSIONS COMPLIANCE PERIOD:CATEGORY (EPA)  
:
VALVE LASH  
(A)  
IN  
:
EX:  
J
CLEAN  
z.zz~z.zz  
z.zz~z.zz  
zzz  
:
&
IDLE MIXTURE  
NO OTHER ADJUSTMENTS NEEDED.  
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  
:
rpm  
AT NO LOAD  
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  
zzzz~zzzz  
:
THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED GASOLINE.  
TYPE  
:
INTERMEDIATE  
SAE 10W  
-
30  
MODERATE  
EXTENDED  
SE  
CHECK OWNERS MANUAL FOR FURTHER D E T A I L S  
L A B E L B E REMOVED B Y U L T I M A T E P U R C H A S E R O N L Y !  
7VV-2179R-00  
2
T
H
I
S
T
O
T
H
E
A
YAMAHA MOTOR CO. LTD  
– 3 –  
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AE00071  
AE00072  
SAFETY INFORMATION  
EXHAUST FUMES ARE POISONOUS  
9 Never operate the engine in a closed area or it  
may cause unconsciousness and death within a  
short time. Operate the engine in a well ventilated  
area.  
741-080  
AE01018  
FUEL IS HIGHLY FLAMMABLE AND POISONOUS  
9 Always turn off the engine when refuelling.  
9 Never refuel while smoking or in the vicinity of an  
open flame.  
741-081  
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 and  
change your clothes.  
741-082  
9 When operating or transporting the generator, be  
sure it is kept upright. If it tilts, fuel may leak from  
the carburetor or fuel tank.  
Also, be sure the fuel tank cap air vent knob is  
tightened when transporting the generator.  
741-083  
AE01019  
ENGINE AND MUFFLER MAY BE HOT  
9 Place the generator in a place where pedestrians  
or children are not likely to touch the generator.  
741-084  
9 Avoid placing any flammable materials near the  
exhaust outlet during operation.  
741-085  
4 –  
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9 Keep the generator at least 1 m (3 ft) from build-  
ings or other equipment, or the engine may over-  
heat.  
a
a 1 m (3 ft)  
741-086  
9 Avoid operating the engine with a dust cover.  
741-087  
9 Be sure to carry the generator only by its carrying  
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handle.  
1 Carrying handle  
741-077  
AE01020  
ELECTRIC SHOCK PREVENTION  
9 Never operate the engine in rain or snow.  
741-088  
9 Never touch the generator with wet hands or elec-  
trical shock will occur.  
741-089  
9 Be sure to ground (earth) the generator.  
NOTE:  
Use ground (earth) lead of sufficient current capacity.  
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1 Lead diameter  
741-078  
5 –  
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Ground (earth) Lead  
Diameter:  
0.12 mm (0.005 in)/ampere  
EX;  
10 Ampere 1.2mm (0.05 in)  
AE00088  
CONNECTION NOTES  
9 Avoid connecting the generator to commercial  
1
2
1
2
power outlet.  
9 Avoid connecting the generator in parallel with any  
other generator.  
1 Correct  
2 Incorrect  
AE00091  
CONNECTION  
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Before the generator can be connected to a build-  
ings electrical system, a licensed electrician must  
install an isolation (transfer) switch in the build-  
ings main fuse box. The switch is the connection  
point for generator power and allows selection of  
generator or main line power to the building. This  
will prevent the generator from charging the main  
power line (backfeeding) when the main power  
supply has failed or has been turned off for line  
repair. Backfeeding can electrocute or injure line  
maintenance personnel. Also, generator and build-  
ing electrical system damage can occur when nor-  
mal operating power returns if unit is used without  
an isolation switch.  
741-090  
AE00086  
EXTENSION CORD NOTES  
9 When using an extension cord, its total length  
should not exceed  
60 meters for cross section of 1.5 mm square  
and  
100 meters for cross section of 2.5 mm  
square.  
9 This extension cord should be protected by a  
tough flexible rubber sheath (IEC 245) or the  
equivalent to withstand mechanical stresses.  
6 –  
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AE00101  
CONTROL FUNCTION  
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AE00102  
DESCRIPTION  
1 Fuel tank  
2 Fuel tank cap  
3 Fuel tank cap air vent knob  
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4 Fuel cock knob  
5 Air filter cover  
6 Spark plug  
7 Muffler  
8 Choke knob  
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!
9 Ground (Earth) terminal  
0 Oil filler cap  
q Recoil starter  
w Carrying handle  
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!
793-104a  
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!
793-105a  
AE00103  
CONTROL PANEL  
1 Overload indicator light  
2 AC pilot light  
q w er  
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3 Oil warning light  
4 Engine switch (Red)  
5 Choke knob  
6 Fuel cock knob  
7 Ground (Earth) terminal  
8 Economy control switch (Black)  
9 DC protector  
0 AC receptacle  
q DC receptacle  
!
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793-106a  
7 –  
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AE00111  
OIL WARNING SYSTEM  
When the oil level falls below the lower level, the  
engine stops automatically. Unless you refill with oil,  
the engine will not start again.  
NOTE:  
If the engine stalls or does not start, turn the engine  
switch to "ON" position and then pull the recoil starter.  
If the oil warning light flickers for a few seconds, the  
engine oil is insufficient. Add oil and restart.  
700-115  
AE00939  
ENGINE SWITCH (Red)  
The engine switch controls the ignition system.  
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1
7 ON”  
Ignition circuit is switched on.  
The engine can be started.  
2
5 STOP”  
763-220  
Ignition circuit is switched off.  
The engine will not run.  
AE00988  
ECONOMY CONTROL SWITCH (Black)  
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1
I
ON”  
When the economy control switch is turned I, the  
economy control unit controls the engine speed  
according to the connected load. The results are better  
fuel consumption and less noise.  
763-221  
2
3 OFF”  
When the economy control switch is turned 3, the  
engine runs at the rated r/min (5,000 r/min) regardless  
of whether there is a load connected or not.  
NOTE:  
The economy control switch must be turned to 3”  
(OFF) when using electric devices that require a large  
starting current, such as a compressor or a submergi-  
ble pump.  
8 –  
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AE01099  
DC PROTECTOR  
The DC protector turns off automatically when the load  
exceeds the generator rated output.  
cC  
Reduce the load to the specified generator rated  
output if the DC protector turns off. If it turns off  
again, consult a Yamaha dealer.  
763-224a  
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NOTE:  
Press to reset the DC protector.  
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1 RESET”  
2 OFF”  
763-238a  
AE01021  
FUEL TANK CAP AIR VENT KNOB  
The fuel tank cap is provided with an air vent knob to  
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stop fuel flow.  
The air vent knob must be turned 1 turn counterclock-  
wise from the tightened position. This will allow fuel to  
flow to the carburetor and the engine to run.  
When the engine is not in use, tighten the air vent  
knob clockwise until it is finger-tight to stop fuel flow.  
1 Air vent knob  
2 Fuel tank cap  
707-096  
AE01034  
FUEL COCK KNOB  
The fuel cock knob is used to supply fuel from the fuel  
tank to the carburetor.  
763-227  
Remove the cover 1 and the fuel cock lever can be  
found inside. If for some reason the fuel cock knob  
cannot be turned, this lever can be used to supply fuel.  
OFF  
ON  
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707-098  
9 –  
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AE00845  
PRE-OPERATION CHECK  
NOTE:  
Pre-operation checks should be made each time the  
generator is used.  
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The engine and muffler will be very hot after the  
engine has been run.  
Avoid touching the engine and muffler while they  
are still hot with any part of your body or clothing  
during inspection or repair.  
741-091  
AE00212  
FUEL  
Make sure there is sufficient fuel in the tank.  
Recommended fuel:  
Unleaded gasoline  
Fuel tank capacity:  
707-091  
Total: 2.5 L (0.55 Imp gal, 0.66 US gal)  
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 of  
91 or higher.  
707-092  
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9 Fuel is highly flammable and poisonous.  
Check SAFETY INFORMATION(See page 4)  
carefully before refueling.  
9 Do not fill above the top of the fuel filter or it  
may overflow when the fuel heats up later and  
expands.  
707-095  
9 Wipe up any spilled fuel immediately.  
9 After refueling, make sure the tank cap is tight-  
ened securely.  
10 –  
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AE01158  
ENGINE OIL  
Make sure the engine oil is at the upper level of the oil  
filler hole. Add oil as necessary.  
NOTE:  
700-116  
Place the generator on a level surface and check the  
oil level of the oil filler hole.  
1 Upper level  
1
Recommended oil:  
å
YAMALUBE 4 (10W-30) or SAE 10W-30  
type SE motor oil  
SAE #30  
SAE #20  
700-119  
ç
0°C  
25°C  
SAE 10W  
A YAMALUBE 4(10W-30)  
Engine oil quantity:  
0.32 L (0.28 lmp qt, 0.34 US qt)  
D SAE 10W  
C SAE #20  
B SAE #30  
NOTE:  
32°F  
80°F  
700-065  
Recommended engine oil classification:  
API Service SEor SF.  
2 Oil filler guide  
cC  
9 The generator has been shipped without  
engine oil. Fill with oil or it will not start.  
9 Do not tilt the generator when adding engine  
oil. This could result in overfilling and damage  
to the engine.  
700-126  
2
AE00241  
GROUND (Earth)  
Make sure to ground (earth) the generator.  
Check SAFETY INFORMATIONon page 5.  
741-079  
11 –  
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AE01109  
OPERATION  
q
cC  
9 The generator has been shipped without  
engine oil. Fill with oil or it will not start.  
9 Do not tilt the generator when adding engine  
oil. This could result in overfilling and damage  
to the engine.  
700-127  
1 Upper level  
AE01104  
STARTING THE ENGINE  
761-078  
NOTE:  
9 Before starting the engine, do not connect any  
electric devices.  
9 Turn the economy control switch (Black) to the  
3(OFF) position.  
q
763-222  
1
3 OFF”  
1. While holding the fuel tank cap so that it will not  
move, turn the air vent knob 1 turn counterclock-  
wise to open the fuel tank air vent.  
q
1 Air vent knob  
707-097  
2. Turn the fuel cock knob to the ONposition.  
q
ON  
1
ON”  
OFF  
705-071c  
3. Turn the engine switch (Red) to the 7(ON) posi-  
tion.  
q
1
7
ON”  
763-223  
12 –  
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4. Pull the choke knob fully out.  
1 Choke knob  
NOTE:  
The choke is not required to start a warm engine.  
Push the choke knob in to the original position.  
q
701-049b  
5. Pull slowly on the recoil starter until it is engaged,  
then pull it briskly.  
NOTE:  
Grasp the carrying handle firmly to prevent the gener-  
ator from falling over when pulling the recoil starter.  
704-017  
6. After the engine starts, warm up the engine until  
the engine does not stop when the choke knob is  
returned to the original position.  
7. Push the choke knob back to the original position.  
701-049c  
NOTE:  
When starting the engine, with the economy control  
switch I(ON), and there is no load on the generator:  
9 in ambient temperature below 3°C (37°F), the  
engine will run at the rated r/min (5,000 r/min) for  
5 minutes to warm up the engine.  
9 in ambient temperature above 3°C (37°F), the  
engine will run at the 4,000 r/min for 3 minutes to  
warm up the engine.  
The economy control unit operates normally after the  
above time period, while the economy control switch is  
I(ON).  
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AE01000  
APPLICATION RANGE  
AC  
DC  
0.40.75  
(Efficiency 0.85)  
Power factor  
1
0.80.95  
720W  
Rated voltage  
12V  
Rated current  
8A  
EF1000iS  
900W  
300W  
NOTE:  
9 “–” means below.  
9 Application wattage indicates when each device is  
used by itself.  
9 The simultaneous usage of AC and DC power is  
possible but total wattage should not exceed the  
rated output.  
EX:  
q
Generator rated output  
900VA  
Frequency  
Power factor  
1.0  
0.8  
800W  
640W  
96W  
AC  
DC  
763-225  
(12V/8A)  
9 The overload indicator light 1 comes on when  
total wattage exceeds the application range. (See  
page 16 for more details.)  
cC  
Be sure the total load is within generator rated output otherwise generator dam-  
age will occur.  
NOTE:  
Some precision equipment is voltage sensitive and may require a more uniform voltage  
supply than portable generators provide. Examples include some medical equipment,  
personal computers, and some inverters that sense peak and RMS voltage values.  
Consult the precision-equipment vendor before relying on any portable generator to pro-  
vide power to such equipment.  
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AE01023  
CONNECTION  
Alternating Current (AC)  
cC  
9 Be sure all electric devices including the lines  
and plug connections are in good condition  
before connection to the generator.  
9 Be sure any electric devices are turned off  
before plugging it in.  
9 Be sure the total load is within generator rated  
output.  
9 Be sure the receptacle load current is within  
receptacle rated current.  
761-079  
1. Wind the power lead 2 or 3 turns around handle.  
2. Start the engine.  
3. Plug in to the AC receptacle.  
761-078a  
4. Make sure the AC pilot light is on.  
q
1 AC pilot light  
763-226  
5. Turn the economy control switch (Black) to the I ”  
(ON) position and turn on any electric devices.  
q
1 I (ON)  
NOTE:  
The economy control switch must be turned to 3”  
(OFF) when using electric devices that require a large  
starting current, such as a compressor or a submergi-  
ble pump.  
763-222a  
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AE00953  
q
Overload indicator light  
The overload indicator light 1 comes on when an  
overload of a connected electrical device is detected,  
the inverter control unit overheats, or the AC output  
voltage rises. The electronic breaker will then activate,  
stopping power generation in order to protect the gen-  
erator and any connected electric devices. The AC  
pilot light (green) will go off and the overload indicator  
light (red) will stay on, but the engine will not stop run-  
ning.  
763-225  
When the overload indicator light comes on and power  
generation stops, proceed as follows:  
1. Turn off any connected electric devices and stop  
the engine.  
2. Reduce the total wattage of connected electric  
devices within the application range.  
3. Check for blockages in the cooling air inlet and  
around the control unit. If any blockages are  
found, remove.  
4. After checking, restart the engine.  
NOTE:  
9 The generator AC output automatically resets  
when the engine is stopped and then restarted.  
9 The overload indicator light may come on for a  
few seconds at first when using electric devices  
that require a large starting current, such as a  
compressor or a submergible pump. However, this  
is not a malfunction.  
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AE01100  
Battery Charging  
NOTE:  
The generator DC rated voltage is 12V.  
1. Wind the battery charging lead 2 or 3 turns around  
the handle and plug into DC receptacle.  
NOTE:  
9 Make connections to the battery after starting the  
engine.  
9 Clamp the red wire to the positive (+) terminal and  
the black wire to the negative (-) terminal of the  
battery. Do not reverse these positions.  
761-079a  
1 Red  
2 Black  
2
1
2. Start the engine.  
3. Press in the DC protector and install the battery.  
762-040  
cC  
9 Be sure the economy control switch is turned  
off while charging the battery.  
9 Be sure the battery leads are properly con-  
nected.  
9 Be sure the breather hose is properly connect-  
ed and is not damaged or obstructed.  
9 Reduce the load to the specified generator  
rated output if the DC protector turns off. If it  
turns off again, consult a Yamaha dealer.  
762-041  
w
NOTE:  
q
Press to reset the DC protector.  
763-238a  
1 RESET”  
2 OFF”  
NOTE:  
9 At full charge, electrolyte specific gravity is  
between 1.26 and 1.28.  
9 Check specific gravity hourly.  
17 –  
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w
Never smoke or make and break connections at  
the battery while charging. Sparks may ignite the  
battery gas.  
Battery electrolyte is poisonous and dangerous,  
causing severe burns, etc. contains sulfuric (sul-  
phuric) acid. Avoid contact with skin, eyes or  
clothing.  
Antidote:  
EXTERNAL-Flush with water.  
INTERNAL-Drink large quantities of water or milk.  
Follow with milk of magnesia, beaten egg or veg-  
etable oil. Call physician immediately.  
EYES: Flush with water for 15 minutes and get  
prompt medical attention. Batteries produce explo-  
sive gases. Keep sparks, flame, cigarettes, etc.,  
away. Ventilate when charging or using in closed  
space. Always cover eyes when working near bat-  
teries. KEEP OUT OF REACH OF CHILDREN.  
762-012  
18 –  
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AE01025  
STOPPING THE ENGINE  
NOTE:  
9 Turn off any electric devices.  
q
9 Turn the economy control switch (Black) to the  
3(OFF) position.  
763-222  
1 3 OFF”  
1. Disconnect any electric devices.  
761-078  
2. Turn the engine switch (Red) to the 5(STOP)  
position.  
1 5 STOP”  
q
763-223a  
3. Turn the fuel cock knob to OFF.  
1 OFF”  
ON  
q
OFF 705-071d  
4. Turn the fuel tank cap air vent knob clockwise until  
it is finger-tight.  
707-097a  
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AE00401  
PERIODIC MAINTENANCE  
AE00403  
MAINTENANCE CHART  
Regular maintenance is most important for best performance and safe operation.  
w
Stop the engine before starting maintenance work.  
Initial  
Every  
6
Pre-Ope-  
ration  
1
3
12  
No.  
Item  
Remarks  
check  
month  
months months months  
(daily)  
or 20 Hr or 50 Hr or 100 Hr or 300 Hr  
Check condition.  
Adjust gap and  
clean. Replace if  
necessary.  
**  
1. Spark Plug  
0
Check and adjust  
when engine is  
cold.  
**  
2.* Valve Clearance  
0
0
Check breather  
hose for cracks or  
damage. Replace  
if necessary.  
**  
Crankcase  
3.*  
breather system  
Check for leakage.  
Retighten or  
*replace gasket  
if necessary.  
0
**  
4. Exhaust System  
Check muffler  
screen and spark  
arrester. Clean/  
replace if  
0
necessary.  
Check oil level  
Replace  
0
5. Engine Oil  
0
0
0
Clean.  
Replace if  
necessary.  
**  
6. Air Filter  
0
Clean fuel tank  
filter. Replace if  
necessary.  
7. Fuel Filter  
*
: It is recommended that these items be serviced by a Yamaha dealer.  
** : Related to emission control system.  
20 –  
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Initial  
Every  
6
Pre-Ope-  
ration  
1
3
12  
No.  
Item  
Remarks  
check  
month  
months months months  
(daily)  
or 20 Hr or 50 Hr or 100 Hr or 300 Hr  
Check fuel hose  
for crack or da-  
mage. *Replace  
if necessary.  
8. Fuel Line  
0
0
Check choke  
operation.  
**  
9. Choke knob  
Check for fan  
damage.  
10. Cooling System  
11. Starting System  
0
0
Check recoil  
starter operation.  
0
0
**  
More frequently  
if necessary.  
12.* Decarbonization  
Check the pilot  
light comes on.  
13. Generation  
Check all fittings  
and fasteners.  
Correct if  
Fittings/  
14.*  
0
Fasteners  
necessary.  
*
: It is recommended that these items be serviced by a Yamaha dealer.  
** : Related to emission control system.  
cC  
Use only Yamaha specified genuine parts for replacement. Ask an authorized  
Yamaha dealer for further attention.  
21 –  
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AE01026  
SPARK PLUG INSPECTION  
You should periodically remove and inspect the spark  
plug.  
1. Remove the cover 1.  
760-025  
q
2. Check for discoloration and remove the carbon.  
Standard electrode color:  
Tan Color  
760-024  
3. Check the spark plug type and gap.  
Standard Spark Plug:  
CR4HSB (NGK)  
Spark Plug Gap:  
a
0.60.7 mm (0.0240.028 in)  
760-001a  
a Gap  
4. Install the spark plug.  
Spark Plug Torque:  
12.5 Nm (1.25 kgfm, 9 lbfft)  
5. Install the cover.  
AE00431  
CARBURETOR ADJUSTMENT  
The carburetor is a vital part of the engine. Adjusting  
should be left to a Yamaha dealer with the profession-  
al knowledge, specialized data, and equipment to do  
so properly.  
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AE01159  
ENGINE OIL REPLACEMENT  
1. Place the generator on a level surface and warm  
up the engine for several minutes.  
Then stop the engine and turn the fuel cock knob  
to OFF. Turn the fuel tank cap air vent knob  
clockwise.  
q
w
788-009  
2. Loosen the screw 1and remove the cover 2.  
3. Remove the oil drain joint 3 pushing downward  
from the bottom of the generator and remove the  
oil filler cap 4.  
4
700-124  
3
4. Attach the oil drain joint 5to the oil filler hole.  
5
700-118b  
5. Place an oil pan under the engine. Tilt the genera-  
tor to drain the oil completely.  
6. Replace the generator on a level surface and  
remove the oil drain joint.  
7. Add engine oil to the upper level of the filler hole  
using the oil filler guide.  
700-120  
6 Oil filler guide  
cC  
Do not tilt the generator when adding engine oil.  
This could result in overfilling and damage to the  
engine.  
700-126a  
6
Recommended oil:  
0°C  
25°C  
å
YAMALUBE 4 (10W-30) or SAE 10W-30  
A YAMALUBE 4(10W-30)  
type SE motor oil  
SAE #30  
SAE #20  
ç
D SAE 10W  
C SAE #20  
B SAE #30  
SAE 10W  
32°F  
80°F  
Engine oil quantity: 0.32 L (0.28 lmp qt, 0.34 US qt)  
700-065  
23 –  
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NOTE:  
Recommended engine oil classification:  
API Service SEor SF.  
8. Wipe the oil drain joint clean, and wipe up any  
spilled oil.  
cC  
Be sure no foreign material enters the crankcase.  
700-117a  
9. Install the oil filler cap.  
10. Replace the oil drain joint in its original position.  
11. Install the cover and tighten the screw.  
788-010  
AE01028  
MUFFLER SCREEN AND SPARK ARRESTER  
w
The engine and muffler will be very hot after the  
engine has been run.  
Avoid touching the engine and muffler while they  
are still hot with any part of your body or clothing  
during inspection or repair.  
741-091  
1. Remove the cover 1.  
q
711-068  
2. Remove the muffler screen.  
3
2 Muffler screen  
3 Screw  
711-069  
2
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3. Use a flathead screw driver to pry the spark  
arrester out from the muffler.  
711-070  
4. Remove the spark arrester.  
4
4 Spark arrester  
711-071  
5. Remove the carbon deposits on the muffler  
screen and spark arrester using a wire brush.  
cC  
When cleaning, use the wire brush lightly to avoid  
damaging or scratching of the muffler screen and  
spark arrester.  
711-022  
6. Check the muffler screen and spark arrester.  
Replace them if damaged.  
711-050  
7. Install the spark arrester.  
NOTE:  
Align the spark arrester projection with the hole in the  
muffler pipe.  
2
711-071a  
1
1 Projection  
2 Hole  
8. Install the muffler screen.  
711-069a  
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9. Install the cover.  
711-068a  
AE01029  
AIR FILTER  
1. Remove the cover 1.  
q
788-001  
2. Remove the clip 2holding the air filter cover 3.  
w
e
788-002a  
3. Remove the air filter cover and element 4.  
4. Wash the element in solvent and dry.  
5. Oil the element and squeeze out excess oil.  
The element should be wet but not dripping.  
r
Recommended oil:  
Foam-air-filter oil  
or  
SAE #20 motor oil  
cC  
Do not wring out the element.  
This could cause it to tear.  
6. Insert the element into the air filter.  
NOTE:  
Be sure the element sealing surface matches the air  
filter so there is no air leak.  
710-059a  
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cC  
The engine should never run without the element;  
excessive piston and cylinder wear may result.  
w
Never use solvent while smoking or in the vicinity  
of an open flame.  
7. Replace the air filter cover in its original position  
and install the clip.  
8. Install the cover.  
AE00471  
FUEL TANK FILTER  
1. Remove the fuel tank cap and filter.  
q
1 Filter  
2. Clean the filter with solvent. If damaged, replace.  
3. Wipe the filter and insert it.  
w
Be sure the tank cap is tightened securely.  
707-094  
27 –  
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AE01097  
TROUBLESHOOTING  
Engine wont start  
1. Fuel systems  
No fuel supplied to combustion chamber.  
2 No fuel in tank .... Supply fuel.  
2 Fuel in tank .... Fuel tank cap air vent knob to  
OPEN(turn it 1 turn counterclockwise).  
Fuel cock knob to ON.  
707-091  
ON  
2 Clogged fuel line .... Clean fuel line.  
2 Clogged carburetor .... Clean carburetor.  
OFF  
705-072  
2. Engine oil system  
Insufficient  
2 Oil level is low .... Add engine oil.  
700-006  
3. Electrical systems  
2 Engine switch (Red) to ON.  
Poor spark  
2 Spark plug dirty with carbon or wet .... Remove  
carbon or wipe spark plug dry.  
2 Faulty ignition system .... Consult dealer.  
763-223b  
4. Compression  
Insufficient  
2 Worn out piston and cylinder .... Consult dealer.  
760-009  
AE00785  
Generator wont produce power  
2 Safety device (AC) to OFF.... Stop the engine,  
then restart.  
2 Safety device (DC protector) to OFF.... Press to  
reset the DC protector.  
28 –  
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AE00515  
A
ENGINE DOES NOT START  
B
Turn the engine switch to ON, then pull  
the recoil starter and check if the oil  
warining light flickers.  
E
F
Check engine oil level.  
OK  
G
Level low  
C
H
Does not flicker  
D
Flickers.  
Consult a  
Yamaha dealer.  
Add engine oil.  
Pull the recoil starter and check the  
spark plug for spark strength.  
(See WARNING)  
K
Check the spark plug.  
9 Type:  
9 Gap:  
L
Incorrect  
M
OK  
w
9 To prevent FIRE HAZARDS be  
sure fuel is not present in the  
spark plug area.  
Replace or  
Adjust Gap.  
Clean the spark  
plug.  
9 To prevent FIRE HAZARDS be  
sure to place the spark plug as  
far way as possible from the  
spark plug hole and carburetor  
area.  
9 To prevent ELECTRIC SHOCK do  
not hold spark plug lead with  
hand while testing.  
I
Engine does not  
start.  
J
Engine starts.  
N
Q
Check the following  
Clean or Replace; Consult  
Yamaha dealer.  
a
O
P
Clogged  
OK  
9 Fuel line clogging  
9 Air cleaner element  
clogging.  
R
Consult a Yamaha dealer.  
29 –  
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AE00601  
STORAGE  
Long term storage of your machine will require some  
preventive procedures to guard against deterioration.  
AE01095  
706-025  
DRAIN THE FUEL  
1. Remove the fuel tank cap. Drain the fuel from the  
fuel tank into an approved gasoline container  
using a commercially available hand siphon.  
Then, install the fuel tank cap.  
w
q
9 Fuel is highly flammable and poisonous.  
Check SAFETY INFORMATION(See page 4)  
carefully.  
788-001  
9 Wipe up any spilled fuel immediately.  
2. Remove the cover 1.  
Drain fuel from the carburetor by loosening the  
drain screw 2on the carburetor float chamber.  
3. Turn the fuel cock knob to OFF.  
w
707-103  
Start the engine and leave it run until it stops.  
This will burn any remaining fuel in the carburetor.  
AE00621  
ENGINE  
1. Remove the spark plug, pour about one table-  
spoon of SAE 10W30 or 20W40 motor oil into the  
spark plug hole and reinstall the spark plug. Recoil  
start the engine by turning over several times (with  
ignition off) to coat the cylinder walls with oil.  
2. Pull the recoil starter until you feel compression.  
Then stop pulling. (This prevents the cylinder and  
valves from rusting).  
3. Clean exterior of the generator and apply a rust  
inhibitor.  
4. Store the generator in a dry, well-ventilated place,  
with the cover placed over it.  
5. The generator must remain in a vertical position  
when stored, carried or operated.  
712-026  
30 –  
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AE00789  
EXHAUST EMISSION CONTROL SYSTEM  
AND COMPONENTS  
Item  
Acronym  
9 CARB. ASSY., LH. & JT.,.......................CARB (Carburetor)  
CARBURETOR2  
9 T.C.I. MAGNETO ASSY. & .....................EI (Electronic Ignition)  
PLUG, SPARK  
9 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  
NONHANDHELD ENGINES and the CALIFORNIA REGULATIONS FOR 1995  
AND LATER SMALL OFF-ROAD ENGINES.  
The acronyms conform to the latest version of the SAEs recommended prac-  
tice document J1930, Diagnostic Acronyms, Terms, and Definitions For  
Electrical/Electronic System.  
It is recommended that these items be serviced by a Yamaha dealer.  
31 –  
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AE00701  
SPECIFICATIONS  
AE00702  
DIMENSIONS  
Unit  
EF1000iS  
450 (17.7)  
240 (9.4)  
Overall Length  
Overall Width  
Overall Height  
Dry Weight  
mm (in)  
mm (in)  
mm (in)  
kg (lb)  
380 (15.0)  
12.7 (28.0)  
AE00704  
ENGINE  
EF1000iS  
Forced air cooled 4-stroke gasoline OHV  
Vertical 1 cylinder  
50  
Unit  
Type  
Cylinder Arrangement  
Displacement  
cm3  
mm (in)  
kW(HP)/r/min  
Hr  
Bore × Stroke  
Rated Output  
41.0 × 38.0 (1.61 × 1.50)  
1.21 (1.67)/5,000  
4.3  
Operation Hours at rated operation  
Fuel  
Unleaded gasoline  
2.5 (0.55, 0.66)  
Fuel Tank Capacity  
Engine Oil Quantity  
Ignition System  
L (Imp gal, US gal)  
L (Imp qt, US qt)  
0.32 (0.28, 0.34)  
TCI  
Spark Plug: Type  
Spark Plug: Gap  
CR4HSB (NGK)  
0.60.7 (0.0240.028)  
mm (in)  
dB (A)  
Noise Level*  
57  
: Measured at rated operation from 7 m (23 ft) distance.  
*
AE00707  
GENERATOR  
Unit  
EF1000iS  
AC Output  
Rated Voltage  
Rated frequency  
Rated current  
Rated Output  
Safty Device: Type  
V
Hz  
A
120  
60  
7.5  
VA  
900  
Electronic  
DC Output  
Rated voltage  
Rated current  
Safety Device: Type  
V
A
12  
8
DC protector  
32 –  
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AE00751  
WIRING DIAGRAM  
Br  
u
q
Br  
R
Br  
R
u
y
G/Y  
W
W
W
Br  
Br  
Br  
Br  
R
Br  
R
Br  
Br  
Br  
W
W
W
Br  
Br  
Br  
W
W
W
W
W
W
R
W
W
W
t
w
B
o
R
B
R
Y
Y
B/W  
L
!
B/W  
W W  
L
L
e
W
B
!
!
W
W
B
r
W
L
B
G
Y
R
L
!
9
!
5 L  
B/W  
O
Y
B
!
B/W  
B
3
O
O
B/W  
@
G
Y
R
L
G
Y
R
Y
Y
L
O
O
G/Y  
B/W  
B/W  
B/W  
B/W  
!
4
L
L
i
@
!
7
B
B
B
!
6
!
8
770-044f  
Color code  
1Main coil  
2Sub coil  
3DC coil  
4DC rectifier  
5Control unit  
6AC pilot light  
7AC receptacle  
8Ground (Earth) terminal  
9Economy control switch  
0Overload indicator light  
qDC protector (breaker)  
wDC receptacle  
eEngine switch  
rOil warning light  
tSpeed limiter  
yOil level gauge  
uIgnition coil  
iSpark plug  
oTCI unit  
pTCI magneto  
aStepping motor  
B
Black  
Br  
G
Gy  
L
Brown  
Green  
Gray  
Blue  
O
R
Orange  
Red  
W
Y
White  
Yellow  
B/W Black/White  
G/Y Green/Yellow  
33 –  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PRINTED IN JAPAN  
!
04 9 04 – 1.2 × 1  
PRINTED ON RECYCLED PAPER  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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