Yamaha Ef2000is 2 Manual

							– 36–
7DK-091
1
7DK-035
1
7DK-038
700-006
AE00512
TROUBLESHOOTING
Engine won’t start
1. Fuel systems
No fuel supplied to combustion chamber.
2No fuel in tank .... Supply fuel.
2Fuel in tank .... Fuel tank cap air vent knob and fuel
cock knob to “ON”1.
2Clogged fuel line .... Clean fuel line.
2Clogged carburetor .... Clean carburetor.
2. Engine oil system
Insufficient
2Oil level is low .... Add engine oil.
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AE00515
Generator won’t produce power
2Safety device (DC protector) to “OFF”2···· Press
the DC protector to “ON”1.
2Safety device (AC) to “OFF”.... Stop the engine,
then restart.
1
27DK-052
7DK-041
791-001d
3. Electrical systems
2Engine switch to “ON”1and pull the recoil starter.
Poor spark
2Spark plug dirty with carbon or wet .... Remove car-
bon or wipe spark plug dry.
2Faulty ignition system .... Consult a Yamaha dealer.
17DK-039
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B
POK
O Clogged C Does not flicker D Flickers.
AE00515
A ENGINE DOES NOT START
Turn the engine switch to “ON”, then pull
the recoil starter and check if the oil
warning light flickers.
HPull the recoil starter and check the
spark plug for spark strength.
(See “WARNING”)
w
9To prevent FIRE HAZARDS be
sure fuel is not present in the
spark plug area.
9To prevent FIRE HAZARDS be
sure to place the spark plug as far
away as possible from the spark
plug hole and carburetor area.
9To prevent ELECTRIC SHOCK do
not hold spark plug lead with
hand while testing.
Dose not sparkIJ
Check the following
9Fuel line clogging
9Air cleaner element
clogging. NClean or replace; Consult a 
Yamaha dealer.Q
Consult a Yamaha dealer.
K Check the spark plug.
9Type: BPR6HS
9Gap: 0.6–0.7 mm (0.024–0.028 in)
L Incorrect M OK
Replace or 
adjust gap.Clean the spark
plug.
E Check engine oil level.
F OK G Level low
Consult a
Yamaha dealer.Add engine oil.
OK
R
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Unit EF2000iS
Type Air cooled 4-stroke gasoline OHV
Cylinder ArrangementInclined, 1 cylinder
Displacement cm379
Bore ×Stroke mm (in) 48.6 ×43.0 (1.91 ×1.69)
Operation Hours Hr 4.2–10.5 (rated load–1/4 load)
Fuel Unleaded gasoline
Fuel Tank Capacity L (US gal, Imp gal) 4.2 (1.11, 0.92)
Engine Oil Quantity L (US qt, Imp qt) 0.4 (0.42, 0.35)
Ignition System CDI
Spark Plug: Type BPR6HS (NGK)
Gap mm (in) 0.6–0.7 (0.024–0.028)
Noise Level*
dB / L
WA87.5
dB (A) / 7 m51.5–61
AE00701
SPECIFICATIONS
AE00702
Dimensions
Unit EF2000iS
Overall Length mm (in) 490 (13.3)
Overall Width mm (in) 280 (11.0)
Overall Height mm (in) 455 (17.9)
Dry Weight kg (lb) 20 (44)
AE00704
Engine
*: Noise level is measured when the economy control switch is turned to “ON”.
LWAshows the sound power level under the ISO3744 satisfied test conditions.
The noise level in “dB (A) / 7 m”is the arithmetic mean value in four directions measured 7
meters away from each side of the generator.
The noise level may vary in different environments.
AE00707
Generator
Unit EF2000iS
AC Output
Rated voltage V 120
Rated frequency Hz 60
Rated current A 13.3
Rated output kVA 1.6
Safety Device: TypeElectronic
DC Output
Rated voltage V 12
Rated current A 8
Safety Device: TypeDC protector
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AE00012
Identification number records
Record your Primary I.D., and serial num-
bers in the spaces provided, to assist you in
ordering spare parts from a Yamaha dealer.
Also record and keep these I.D. numbers in
a separate place in case your machine is
stolen. PRI-I.D. NUMBER:
PRI-I.D.
CODESERIAL No. MODEL
7DK-0737DK-24163-00Serial NO.7DK-
CONSUMER INFORMATION
AE00011
Machine identification
The machine serial number is stamped in
the location as shown.
TIP
The first three digits of these numbers are
for model identification; the remaining digits
are the unit production number. Keep a
record of these numbers for reference
when ordering parts from a Yamaha dealer.
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AE00789
EXHAUST EMISSION CONTROL SYSTEM AND 
COMPONENTS
Item Acronym
9CARB. ASSY., LH. & JT., .......................CARB (Carburetor)
CARBURETOR2
9T.C.I. MAGNETO ASSY. &  .....................EI (Electronic Ignition)
PLUG, SPARK
9CRANKCASE1 & HEAD, .......................PCV (Positive Crankcase
CYLINDER1 Ventilation)
9AIR FILTER ASSY. . ................................ACL (Air Cleaner)
9MUFF., 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 practice docu-
ment J1930, “Diagnostic Acronyms, Terms, and Definitions For Electrical/Electronic
System”.
It is recommended that these items be serviced by a Yamaha dealer.
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W
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L L
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7DK-10
AE00751
WIRING DIAGRAM
1Sub coil
2DC coil
3Main coil
4DC rectifier
5DC protector (breaker)
6Twin Tech (parallel 
running terminal)
7DC receptacle
8AC pilot light
9AC receptacle
0Economy control switch
qOverload indicator light
wEngine switch
eOil warning light
rGround (earth) terminal
tControl unit
yCDI unit/Ignition coil
uStepping motor
iSpark plug
oCDI magneto pOil level gaugeColor code
B Black
Br Brown
G Green
Gy Gray
LBlue
O Orange
R Red
W White
Y Yellow
B/W Black/White
G/Y Green/Yellow
R/W Red/White
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							– 43 –
YAMAHA MOTOR CORPORATION, U.S.A. 
EF SERIES GENERATORS 
3-YEAR LIMITED WARRANTY
Yamaha Motor Corporation, U.S.A. hereby war-
rants that new Yamaha generators purchased
from an authorized Yamaha generator dealer in
the United States will be free from defects in mate-
rial and workmanship for the period of time stated
herein, subject to certain stated limitations.
THE PERIOD OF WARRANTYAny new EF-
series Yamaha generator purchased from an
authorized Yamaha generator dealer in the United
States will be warranted against defects in materi-
al or workmanship for a period of three (3) years
from date of purchase for pleasure or (except
EF1000iS) commercial use, subject to exclusions
noted herein. Yamaha EF1000iS generators pur-
chased for commercial use from an authorized
Yamaha generator dealer in the continental United
States will be warranted against defects in materi-
als or workmanship for a period of two (2) years
from the date of purchase, subject to exclusions
noted herein.
DURING THE PERIOD OF WARRANTYany
authorized Yamaha generator service dealer will,
free of charge, repair or replace, at Yamaha’s
option, any part judged defective by Yamaha due
to faulty workmanship or material from the factory.
Parts used in warranty repairs will be warranted
for the balance of the product’s warranty period.
All parts replaced under warranty become the
property of Yamaha Motor Corporation, U.S.A.
GENERAL EXCLUSIONSfrom 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.
SPECIFIC EXCLUSIONSfrom this warranty shall
include parts replaced due to normal wear or rou-
tine maintenance.
THE CUSTOMER’S RESPONSIBILITYunder this
warranty 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 service dealer of any and all
apparent defects within ten (10) days after dis-covery, and make the machine available at
that time for inspection and repairs at such
dealer’s place of business. You may locate
your nearest authorized Yamaha generator
service dealer online at www.yamaha-
motor.com.
EMISSION CONTROL SYSTEM WARRANTY
Yamaha Motor Corporation, U.S.A. also warrants
to the ultimate purchaser and each subsequent
purchaser of each 1995 and later Yamaha
Generator covered by this warranty that the prod-
uct is designed, built, and equipped so as to con-
form at the time of sale with all U.S. emissions
standards applicable at the time of manufacture
and that it is free from defects in materials and
workmanship which would cause it not to meet
these standards within the period listed immedi-
ately below. Failures other than those resulting
from defects in material or workmanship which
arise solely as a result of owner abuse and/or lack
of proper maintenance are not covered by this
warranty.
All 1995 and Later EF Models
Two (2) years from the original purchase date
WARRANTY TRANSFER: To transfer any
remaining warranty from the original purchaser to
any subsequent purchaser, it is imperative that the
unit be inspected and registered for warranty by
an authorized Yamaha consumer generator deal-
er. In order for this warranty to remain in effect,
this inspection and registration must take place
within ten (10) days after transfer. A reasonable
dealer imposed fee may be charged for the
inspection.
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.
SOME STATES DO NOT ALLOW LIMITATIONS ON
HOW LONG AN IMPLIED WARRANTY LASTS, SO
THE ABOVE LIMITATIONS MAY NOT APPLY TO
YOU. ALSO EXCLUDED FROM THIS WARRANTY
ARE ANY INCIDENTAL OR CONSEQUENTIAL
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							– 44 –
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.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, AND YOU MAY ALSO HAVE OTHER
RIGHTS WHICH VARY FROM STATE TO STATE.
YAMAHA MOTOR CORPORATION, U.S.A.
Post Office Box 6555
Cypress, California 90630
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							– 45 –
WARRANTY QUESTIONS AND ANSWERS
Q.  Is the warranty transferable to second own-
ers?
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.
CUSTOMER SERVICE
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:
YAMAHA MOTOR CORPORATION U.S.A. 
CUSTOMER RELATIONS DEPARTMENT
P.O. BOX 6555
Cypress, California 90630
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:
YAMAHA MOTOR CORPORATION, U.S.A.
WARRANTY DEPARTMENT 
P.O. Box 6555
Cypress, California 90630
This will ensure that Yamaha Motor Corporation,
U.S.A. has an up-to-date registration record in
accordance with federal law. Q.  What costs are my responsibility during the
warranty period?
A.  The customer’s responsibility includes all
costs of normal maintenance service, non-
warranty repairs, accident damages, as well
as oil and spark plugs.
Q.  What are some examples of “abnormal” strain,
neglect, or abuse?
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.
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.
Q.  May I perform any or all of the recommended
maintenance shown in the Owner’s Manual
instead of having the dealer do them?
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.
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:
1.  Check the operation of the generator
before sale.
2.  Explain the operation, maintenance, and
warranty requirements to your satisfaction
at the time of sale, and upon your request
at any later date. 
In addition, each Yamaha generator dealer is
held responsible for his setup, service and
warranty repair work.
 7DK-9-11_b  11.4.19 10:08  Page 45