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!
w
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 OWNER’S 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 BUILDING’S ELECTRICAL
SYSTEM UNLESS AN ISOLATION SWITCH HAS BEEN INSTALLED BY A
LICENSED ELECTRICIAN. REFER TO THE OWNER’S 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
q
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.
q
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-
ing’s electrical system, a licensed electrician must
install an isolation (transfer) switch in the build-
ing’s 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.
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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
w
NOTE:
Press to reset the DC protector.
q
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
q
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
w
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 “SE” or “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 INFORMATION” on page 5.
741-079
– 11 –
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AE01109
OPERATION
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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 “ON” position.
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).
– 13 –
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AE01000
APPLICATION RANGE
AC
DC
0.4–0.75
(Efficiency 0.85)
Power factor
1
0.8–0.95
–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.
– 14 –
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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
– 15 –
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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.
– 16 –
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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
– 19 –
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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
0.6–0.7 mm (0.024–0.028 in)
760-001a
a Gap
4. Install the spark plug.
Spark Plug Torque:
12.5 N•m (1.25 kgf•m, 9 lbf•ft)
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.
– 22 –
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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 “SE” or “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
– 24 –
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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
– 25 –
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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
– 26 –
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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 won’t 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 won’t 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 SAE’s 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)
0.6–0.7 (0.024–0.028)
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 –
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PRINTED IN JAPAN
!
04 9 04 – 1.2 × 1
PRINTED ON RECYCLED PAPER
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