Page 1
OWNER’S MANUAL
Generator
EF2400iS
LIT-19626-01-23 7CF-28199-10
Page 2
Page 3
AE00002
790-072
7CH-24163-**
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.
PRI-I.D. NUMBER
MODEL
PRI-I.D.
CODE
SERIAL No.
AE00012
IDENTIFICATION NUMBER RECORDS
Record your Primary I.D., and serial numbers 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.
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 digits are the unit production number. Keep a
record of these numbers for reference
when ordering parts from a Yamaha dealer.
AE00022
EF2400iS
OWNER’S MANUAL
© 2005 by Yamaha Motor Corporation, U.S.A.
1st Edition, February 2005
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-19626-01-23
Page 4
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 manual,
please consult your Yamaha dealer.
9 This manual should be considered a
permanent part of this engine and
should remain with this engine when
resold.
AE00032
w
PLEASE READ AND UNDERSTAND
THIS MANUAL COMPLETELY BEFORE
OPERATING THE MACHINE.
Particularly important information is distinguished in this manual by the following
notations.
-
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY
IS INVOLVED!
w
Failure to follow WARNING instructions
could result in se
engine operator, a bystander, or a person
inspecting or repairing the engine.
vere injury or death to the
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.
Page 5
AE00041
CONTENTS
LIMITED WARRANTY (EF- AND
EDL-SERIES)..........................................1
LOCATION OF IMPORTANT LABELS ..3
SAFETY INFORMATION ........................5
EXHAUST FUMES ARE
POISONOUS .......................................5
FUEL IS HIGHLY FLAMMABLE AND
POISONOUS .......................................5
ENGINE AND MUFFLER MAY
BE HOT................................................5
ELECTRIC SHOCK PREVENTION.....6
CONNECTION NOTES .......................7
CONNECTION.....................................7
EXTENSION CORD NOTES ...............7
CONTROL FUNCTION...........................8
DESCRIPTION ....................................8
CONTROL PANEL ...............................8
OIL WARNING SYSTEM .....................9
ENGINE SWITCH................................9
DC PROTECTOR ................................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
SPARK PLUG INSPECTION .............22
CARBURETOR ADJUSTMENT.........22
ENGINE OIL REPLACEMENT ..........23
MUFFLER SCREEN AND SPARK
ARRESTER .......................................24
AIR FILTER ........................................26
FUEL TANK FILTER...........................27
TROUBLESHOOTING..........................28
STORAGE.............................................30
DRAIN THE FUEL .............................30
ENGINE .............................................30
EXHAUST EMISSION CONTROL
SYSTEM AND COMPONENTS............31
SPECIFICATIONS.................................32
DIMENSIONS ....................................32
ENGINE .............................................32
GENERATOR.....................................32
WIRING DIAGRAM...............................33
Page 6
AE01120
YAMAHA MOTOR CORPORATION U.S.A.
EF- AND EDL-SERIES GENERATOR LIMITED WARRANTY
Yamaha Motor Corporation, U.S.A. hereby warrants
that new Yamaha consumer generators purchased
from an authorized Yamaha consumer generator
dealer in the continental United States will be free
from defects in material and workmanship for the
period of time stated herein, subject to certain stated limitations.
THE PERIOD OF WARRANTY Any new EF-series
or EDL-series Yamaha Generator purchased 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 workmanship 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.
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 warranted for
the balance of the product’s warranty period. All
parts replaced under warranty become property of
Yamaha Motor Corporation U.S.A.
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.
SPECIFIC EXCLUSIONS from this warranty shall
include parts replaced due to normal wear or routine maintenance.
THE CUSTOMER’S RESPONSIBILITY under 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 consumer generator dealer of any and all apparent
defects within ten (10) days after discovery,
and make the unit available at that time for
inspection and repairs at such dealer’s place of
business.
WARRANTY TRANSFER: To transfer the warranty
from the original purchaser to any subsequent purchaser(s), it is imperative that the unit be inspected
and registered for warranty by an authorized
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 period.
YAMAHA MOTOR CORPORATION, U.S.A. MAKES
NO OTHER WARRANTY OF ANY KIND,
EXPRESSED OR IMPLIED. ALL IMPLIED WARRANTIES 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 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 CONSEQUENTIAL 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
– 1 –
Page 7
WARRANTY QUESTIONS AND ANSWERS
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 another part to fail; and so on. If you have any specific questions on operation or maintenance,
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.
Q. Is the warranty transferable to second owners?
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 identification or
other valid proof of the original date of purchase. If
a question or problem arises regarding warranty,
first contact the owner of the dealership. Since all
warranty matters are handled at the dealer level,
this person is in the best position to help you. If you
are still not satisfied and require additional 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 manufacturer 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 postcard 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.
– 2 –
Page 8
AE00062
4 31
2
792-063
3 4
792-064
LOCATION OF IMPORTANT LABELS
Please read the following labels carefully before operating this machine.
NOTE:
Maintain or replace safety and instruction labels, as
necessary.
– 3 –
Page 9
12
WARNING
READ THE OWNER’S MANUAL AND ALL LABELS BEFORE OPERATING.
q
q
AVERTISSEMENT
8
ONLY OPERATE IN WELL-VENTILATED AREAS.
EXHAUST GAS CONTAINS POISONOUS CARBON MONOXIDE.
CHECK FOR SPILLED FUEL OR FUEL LEAKS.
STOP ENGINE BEFORE REFUELING.
DO NOT OPERATE NEAR FLAMMABLE MATERIALS.
ELECTROCUTION CAN OCCUR IF GENERATOR IS USED IN RAIN,
SNOW, OR NEAR WATER. KEEP THIS UNIT DRY AT ALL TIMES.
8
8
8
8
8
MACHINE AUSEC EN TOUTES CIRCONSTANCES.
7CF-24162-10
8
8
8
8
8
8
LISEZ LE MODE D’EMPLOI ET TOUTES LES ETIQUETTES AVANT DE
FAIRE FONCTIONNER LA MACHINE.
FAITES FONCTIONNER UNIQUEMENT DANS DES LIEUX BIEN AERES.
LES GAZ D’ECHAPPEMENT CONTIENNENT DU MONOXYDE DE CARBONE.
VERIFIEZ SI DU CARBURANT A ETE RENVERSE OU S’IL FUIT.
ARRETEZ LE MOTEUR AVANT DE FAIRE LE PLEIN DE CARBURANT.
N’UTILISEZ PAS A PROXIMITE DE MATERIAUX INFLAMMABLES.
IL Y A RISQUE D’ELECTROCUTION SI LE GENERATEUR FONCTIONNE
SOUS LA PLUIE, DANS LA NEIGE, OU PRES DE L’EAU. GARDEZ LA
0
2
4
6
8
10
ENGINE AIR INDEX
(
California onl
y
)
LEAST CLEAN
MOST CLEAN
NOTE
:
THE LOWER THE AIR INDEX, THE LESS THE POLLUTION
FOR THE FOLLOWING USE:
THIS ENGINE IS CERTIFIED TO BE EMISSION COMPLIANT
MODERATE
INTERMEDIATE
EXTENDED
CHECK OWNERS MANUAL FOR FURTHER DETAILS
THIS LABEL TO BE REMOVED BY TH E ULTIMATE PURCHASER ONLY!
IMPORTANT ENGINE INFORMATION
ENGINE FAMILY :
zzzzzzzzzzzz
E M
REFER TO OWNER'S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
YAMAHA MOTOR CO. LTD
DISPLACEMENT
:
VALVE LASH (A)
rpm
NO OTHER ADJUSTMENTS NEEDED.
ENGINE OIL
:
IDLE SPEED
:
FUEL: THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED GASOLINE.
IGNITION TIMING & IDLE MIXTURE
zzz
J
IN
:
TYPE
z.zz~z.zz
EX
:
z.zz~z.zz
zzzz
~
zzzz
AT NO LOAD
SE
SAE 10W
-
30
THIS ENGINE MEETS
zzzz-zzzz
CALIFORNIA EMISSION REGULATIONS FOR SMALL OFF-ROAD ENGINES.
THIS ENGINE CONFORMS TO PHASE 2 U.S.EPA REGULATIONS FOR SMALL NONROAD ENGINES.
EMISSIONS COMPLIANCE PERIOD:CATEGORY A (EPA)
zzz
-2179R-00
HOT EXHAUST
***-28176-**
OIL
zzzzzz
AC output zzHz
Rated
zzz
KVA
Phase Single
DC output
zz
V zzA
Fuel
Gasoline
YAMAHA MOTOR CO., LTD.
MADE IN JAPAN
zzz
V
***-24164-**
3
4
– 4 –
Page 10
741-112
741-113
741-114
AE00071
SAFETY INFORMATION
AE00072
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.
AE00075
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.
9 Take care not to spill any fuel on the engine or muf-
fler when refuelling.
9 If you swallow any fuel, inhale fuel vapor, or allow
any to get in your eye(s), see your doctor immediately. If any fuel spills on your skin or clothing,
immediately wash with soap and water and change
your clothes.
9 When operating or transporting the machine, be
sure it is kept upright. If it tilts, fuel may leak from
the carburetor or fuel tank.
741-115
AE00843
ENGINE AND MUFFLER MAY BE HOT
9 Place the machine in a place where pedestrians or
children are not likely to touch the machine.
741-116
9 Avoid placing any flammable materials near the
exhaust outlet during operation.
741-117
– 5 –
Page 11
741-118
a
9 Keep the machine at least 1 m (3 ft) from buildings
741-119
741-120
741-121
741-125
1
or other equipment, or the engine may overheat.
a 1 m (3 ft)
9 Avoid operating the engine with a dust cover.
1
9 Be sure to carry the generator only by its carrying
handle(s).
1 Carrying handle(s) (shaded)
741-124
AE00083
ELECTRIC SHOCK PREVENTION
9 Never operate the engine in rain or snow.
9 Never touch the machine with wet hands or electri-
cal shock will occur.
9 Be sure to ground (earth) the generator.
NOTE:
Use ground (earth) lead of sufficient current capacity.
1 Lead diameter
– 6 –
Page 12
Ground (earth) Lead
1
2
1
741-122
Diameter:
0.12 mm (0.005 in)/ampere
EX;
10 Ampere → 1.2 mm (0.05 in)
AE01181
CONNECTION NOTES
9 Avoid connecting the generator to commercial
power outlet.
1 Correct
2 Incorrect
AE00091
CONNECTION
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Before the generator can be connected to a building’s electrical system, a licensed electrician must
install an isolation (transfer) switch in the building’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 building
electrical system damage can occur when normal
operating power returns if unit is used without an
isolation switch.
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.
– 7 –
Page 13
AE00101
5
6
23
4
11
793-146
1 123
7
793-147
q
we
r
o
i
u
t
y
793-148
CONTROL FUNCTION
AE00102
DESCRIPTION
1 Carrying handles (shaded)
2 Fuel level gauge
3 Fuel tank cap
4 Oil filler cap
5 Recoil starter
6 Fuel cock
7 Muffler
AE00103
CONTROL PANEL
1 Engine switch
2 Twin Tech (parallel running terminal)
3 DC protector
4 Oil warning light
5 AC pilot light
6 Overload indicator light
7 AC receptacle
8 DC receptacle
9 Ground (Earth) terminal
– 8 –
Page 14
700-121
AE00111
763-260
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.
AE00124
ENGINE SWITCH
The engine switch controls the ignition system.
1 7 “ON”
Ignition circuit is switched on.
q
The engine can be started.
2 5 “STOP”
Ignition circuit is switched off.
w
763-259
The engine will not run.
AE00780
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.
w
q
763-238a
763-263
NOTE:
Press to reset the DC protector.
1 I “ON”
2 3 “OFF”
AE01179
TWIN TECH (TERMINAL FOR CONNECTING SPECIAL CABLES FOR PARALLEL RUNNING )
This is the terminal for connecting special cables for parallel running of two EF2400iS. The parallel running
requires two EF2400iS and the special cables. (The
rated output in parallel running is 3.6 kVA and the rated
current is 30.0 A.)
The handling, operation procedure and the notes on
usage are described in the PARALLEL RUNNING KIT
OWNER’S MANUAL included in the Parallel Running Kit.
Consult a Yamaha dealer for this Parallel Running Kit.
– 9 –
Page 15
741-123
AE00845
PRE-OPERATION CHECK
NOTE:
Pre-operation checks should be made each time the
generator is used.
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.
AE00856
FUEL
Make sure there is sufficient fuel in the tank.
Recommended fuel:
q
707-033c
707-106
Unleaded gasoline
Fuel tank capacity:
Total: 6.0 L (1.32 Imp gal, 1.59 US gal)
Your Yamaha engine has been designed to use regular
unleaded gasoline with a pump octane number ((R +
M)/2) of 86 or higher, or research octane number of 91
or higher.
1 Fuel level gauge
707-037
707-107
“F” Full
“E” Empty
w
9 Fuel is highly flammable and poisonous. Check
“SAFETY INFORMATION” (See page 5) careful-
ly 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.
9 Wipe up any spilled fuel immediately.
9 After refueling, make sure the tank cap is tight-
ened securely.
– 10 –
Page 16
700-128
AE00222
ENGINE OIL
Make sure the engine oil is at the upper level of the oil
filler hole.
Add oil as necessary.
1 Upper level
0°C
A YAMALUBE 4(10W-30)
D SAE 10W
C SAE #20
25°C
80°F32°F
q
700-103c
B SAE #30
700-065
700-006
Recommended oil:
å YAMALUBE 4 (10W-30) or SAE 10W-30
type SE motor oil
∫ SAE #30
ç SAE #20
∂ SAE 10W
Engine oil quantity:
0.6 L (0.53 lmp qt, 0.63 US qt)
NOTE:
Recommended engine oil classification:
API Service “SE” or “SF”.
cC
The generator has been shipped without engine oil.
Fill with oil or it will not start.
AE00241
GROUND (Earth)
Make sure to ground (earth) the generator.
Check “SAFETY INFORMATION” on page 6.
741-126
– 11 –
Page 17
700-006a
a
761-085
701-051
2
AE00955
OPERATION
NOTE:
The generator has been shipped without engine oil. Fill
with oil or it will not start.
1 Upper level
AE01171
STARTING THE ENGINE
NOTE:
9 Before starting the engine, do not connect any
electric devices.
1
1. Turn the fuel cock lever to the “ON” position.
1 “ON”
705-075
2. Pull the choke knob fully out.
2 Choke knob
NOTE:
The choke is not required to start a warm engine.
Push the choke knob in to the original position.
e
763-261
3. Turn the engine switch to the “7” (ON) position.
3 7 “ON”
– 12 –
Page 18
704-019
701-051a
4. Pull slowly on the recoil starter until it is engaged,
then pull it briskly.
5. After the engine starts, warm up the engine until
the engine does not stop when the choke knob is
returned to the original position.
6. Push the choke knob back to the original position.
NOTE:
When starting the engine in areas where the ambient
temperature is below 0°C (32°F), the engine automatically operates at the rated r/min (3,200 r/min) for three
minutes to warm up the engine
– 13 –
Page 19
AE01180
q
760-029
APPLICATION RANGE
AC DC
Power factor 1 0.8–0.95
EF2400iS –2,000W –1,600W –680W
0.4–0.75
(Efficiency 0.85)
NOTE:
9 “–” means below.
9 Application wattage indicates when each device is
used by itself.
9 The overload indicator light 1 comes on when
total wattage exceeds the application range. (See
page 16 for more details.)
cC
9 Be sure the total load is within generator rated
output otherwise generator damage will occur.
9 Do not use AC and DC power at the same time
or the generator may be damaged.
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 provide power to such equipment.
Rated voltage
12V
Rated current
8A
– 14 –
Page 20
761-086
761-085a
AE01172
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.
1. Wind the power lead 2 or 3 turns around handle.
2. Start the engine.
3. Plug in to the AC receptacle.
q
4. Make sure the AC pilot light is on.
1 AC pilot light
5. Turn on any electric devices.
760-030
– 15 –
Page 21
q
760-029
AE00788
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 generator 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 running.
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 –
Page 22
761-086a
AE00904
Battery Charging
cC
Do not use AC and DC power at the same time or
the generator may be damaged.
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.
2
1
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.
762-046
12v
762-047
w
q
763-238a
1 Red
2 Black
2. Start the engine.
3. Press in the DC protector and install the battery.
cC
9 Be sure the battery leads are properly connect-
ed.
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.
NOTE:
Press to reset the DC protector.
1 “ON”
2 “OFF”
NOTE:
9 At full charge, electrolyte specific gravity is
between 1.26 and 1.28.
9 Check specific gravity hourly.
– 17 –
Page 23
w
762-012
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 (sulphuric) 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 vegetable oil. Call physician immediately.
EYES: Flush with water for 15 minutes and get
prompt medical attention. Batteries produce explosive gases. Keep sparks, flame, cigarettes, etc.,
away. Ventilate when charging or using in closed
space. Always cover eyes when working near batteries. KEEP OUT OF REACH OF CHILDREN.
– 18 –
Page 24
761-085
AE01173
STOPPING THE ENGINE
NOTE:
9 Turn off any electric devices.
1. Disconnect any electric devices.
2. Turn the engine switch to the “5” (STOP) position.
1 5 “STOP”
q
763-262
3. Turn the fuel cock lever to “OFF”.
2
705-075a
2 “OFF”
– 19 –
Page 25
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.
Pre-Ope-
No. Item Remarks
Check condition.
1.
**
Spark Plug clean. Replace if
**
2.* Valve Clearance when engine is 0
**
Crankcase
breather system
**
4.*
**
5. Exhaust System
6. Engine Oil
**
7. Air Filter Replace if 0
* : It is recommended that these items be serviced by a Yamaha dealer.
** : Related to emission control system.
Adjust gap and
necessary.
Check and adjust
cold.
Check breather
hose for cracks or
damage. Replace
if necessary.
Check and adjust
engine idle speed.
Check for leakage.
Retighten or
*replace gasket
if necessary.
Check muffler
screen and spark
arrester. Clean/ 0
replace if
necessary.
Check oil level 0
Replace 00
Clean.
necessary.
ration
check
(daily)
0
Initial Every
1
month
or 20 Hr
3
months
or 50 Hr
0
months
or 100 Hr
6
months
or 300 Hr
12
03.*
0Idle speed
– 20 –
Page 26
Pre-Ope-
No. Item Remarks
Clean fuel tank
8. Fuel Filter filter. Replace if 0
necessary.
Check fuel hose
9. Fuel Line
**
10.
11. Cooling System
**
13.*
14. Generation
Fittings/ and fasteners.
15.*
Fasteners Correct if
for crack or damage. *Replace
if necessary.
Check choke
operation.
Check for fan
damage.
Check recoil
starter operation.
More frequently
if necessary.
Check the pilot
light comes on.
Check all fittings
necessary.
ration
check
(daily)
0
0Choke knob
012. Starting System
0
Initial Every
1
month
or 20 Hr
3
months
or 50 Hr
months
or 100 Hr
6
0
12
months
or 300 Hr
0
0Decarbonization
* : 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 –
Page 27
788-014
1 1
2
a
760-001a
AE01051
SPARK PLUG INSPECTION
You should periodically remove and inspect the spark
plug.
1. Loosen the bolt 1 and remove the side cover 2.
2. Remove the spark plug cap and the spark plug.
3. Check for discoloration and remove the carbon.
Standard electrode color:
Tan Color
4. Check the spark plug type and gap.
760-031
Standard Spark Plug:
BPR4ES (NGK)
Spark Plug Gap:
0.7–0.8 mm (0.028–0.031 in)
a Gap
5. Install the spark plug.
Spark Plug Torque:
17.5 N•m (1.75 kgf•m, 13 lbf•ft)
6. Install the spark plug cap.
7. Install the side cover and tighten the bolt.
AE00431
CARBURETOR ADJUSTMENT
The carburetor is a vital part of the engine. Adjusting
should be left to a Yamaha dealer with the professional
knowledge, specialized data, and equipment to do so
properly.
– 22 –
Page 28
700-133
3
3
6
4
700-006a
q
700-130
1
5
AE01174
ENGINE OIL REPLACEMENT
1. Place the machine on a level surface and warm up
the engine for several minutes.
Then stop the engine.
2. Remove the rubber cap 1 on the bottom.
3. Place an oil pan under the engine . Remove the
drain bolt 2.
2
700-132
4. Open the oil filler cover 3 as shown and remove
the oil filler cap 4 so that the oil can be completely drained.
5. Check the drain bolt , gasket 5, oil filler cap and Oring 6.
If damaged, replace.
6. Reinstall the oil drain bolt.
Drain Bolt Torque:
17 N•m (1.7 kgf•m, 12 lbf•ft)
7. Add engine oil to the upper level.
1Upper level
– 23 –
Page 29
741-123
700-065
0°C
25°C
80°F32°F
A YAMALUBE 4(10W-30)
D SAE 10W
C SAE #20
B SAE #30
Recommended oil:
å YAMALUBE 4 (10W-30) or SAE 10W-30
type SE motor oil
∫ SAE #30
ç SAE #20
∂ SAE 10W
Engine oil quantity:
0.6 L (0.53 Imp qt, 0.63 US qt)
NOTE:
Recommended engine oil classification:
API Service “SE” or “SF”.
cC
Be sure no foreign material enters the crankcase.
8. Install the oil filler cap.
9. Install the rubber cap on the bottom.
cC
Be sure to install securely to prevent from falling
off during operation.
10. Close the oil filler cover.
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.
3
1. Remove the cover 1
1
788-016
2. Remove the muffler screen.
2 Muffler screen
2
711-077
3 Screw
– 24 –
Page 30
711-080
q
w
711-078
3. Use a flathead screw driver to pry the spark
arrester out from the muffler.
4. Remove the spark arrester.
q
1 Spark arrester
711-079
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
711-075
spark arrester.
6. Check the muffler screen and spark arrester.
Replace them if damaged.
7. Install the spark arrester.
NOTE:
Align the spark arrester projection with the hole in the
muffler pipe.
1 Projection
2 Hole
8. Install the muffler screen.
711-081
9. Install the cover.
788-016a
– 25 –
Page 31
710-037a
E01175
788-017
1
2
1
AIR FILTER
1. Loosen the bolt 1 and remove the cover 2.
2. Remove the air filter cover and element.
3. Wash the foam element in solvent and dry.
4. Oil the foam element and squeeze out excess oil.
The foam element should be wet but not dripping.
Recommended oil:
Foam-air-filter oil
or
SAE #20 motor oil
cC
Do not wring out the element.
This could cause it to tear.
5. Insert the element into the air filter.
NOTE:
Be sure the element sealing surface matches the air filter so there is no air leak.
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.
6. Install the air filter cover.
7. Install the cover and tighten the bolt.
– 26 –
Page 32
707-108
q
AE00471
FUEL TANK FILTER
1. Remove the fuel tank cap and filter.
1 Filter
2. Clean the filter with solvent. If damaged, replace.
3. Wipe the filter and insert it.
w
Be sure the tank cap is tightened securely.
– 27 –
Page 33
707-106
705-075b
700-006
763-261a
AE01176
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 cock lever to “ON”.
2 Clogged fuel line .... Clean fuel line.
2 Clogged carburetor .... Clean carburetor.
2. Engine oil system
Insufficient
2 Oil level is low .... Add engine oil.
3. Electrical systems
2 Engine switch to “ON”.
Poor spark
2 Spark plug dirty with carbon or wet .... Remove car-
bon or wipe spark plug dry.
2 Faulty ignition system .... Consult dealer.
4. Compression
Insufficient
2 Worn out piston and cylinder .... Consult dealer.
2 Loose cylinder head nuts .... Tighten nuts properly.
2 Damaged gasket .... Replace gasket.
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 –
Page 34
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 Check engine oil level.
C Does not flicker D Flickers.
H
Pull the recoil starter and check the
spark plug for spark strength.
(See “WARNING”)
w
9 To prevent FIRE HAZARDS be
sure fuel is not present in the
spark plug area.
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 J
Engine does not
start.
Engine starts.
F OK G Level low
Consult a
Yamaha dealer.
K Check the spark plug.
9 Type:
9 Gap:
L Incorrect M OK
Replace or
Adjust Gap.
Add engine oil.
Clean the spark
plug.
N
Check the following
9 Fuel line clogging
9 Air cleaner element
clogging.
O Clogged
POK
– 29 –
Q
Clean or Replace; Consult a
Yamaha dealer.
R Consult a Yamaha dealer.
Page 35
707-109
1
AE00601
STORAGE
Long term storage of your machine will require some
preventive procedures to guard against deterioration.
AE01177
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
9 Fuel is highly flammable and poisonous. Check
“SAFETY INFORMATION” (See page 5) carefully.
9 Wipe up any spilled fuel immediately.
2. Drain fuel from the carburetor by loosening the
drain screw 1 on the carburetor float chamber.
3. Turn the fuel cock lever to “OFF”. 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 tablespoon 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.
712-030
– 30 –
Page 36
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 OFFROAD 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.
– 31 –
Page 37
AE00701
SPECIFICATIONS
AE00702
DIMENSIONS
Unit EF2400iS
Overall Length mm (in) 527 (20.7)
Overall Width mm (in) 419 (16.5)
Overall Height mm (in) 461 (18.1)
Dry Weight kg (lb) 32 (72)
AE00704
ENGINE
Unit
Type Forced air cooled 4-stroke gasoline OHV
Cylinder Arrangement Inclined, 1 cylinder
Displacement cm
3
Bore × Stroke mm (in) 66.0 × 50.0 (2.60 × 1.97)
Rated Output kW(HP)/r/min 2.5 (3.4)/3,200
Operation Hours at rated operation
Hr 8.6
Fuel Unleaded gasoline
Fuel Tank Capacity
L (Imp gal, US gal)
Engine Oil Quantity L (Imp qt, US qt) 0.6 (0.53, 0.63)
Ignition System TCI
Spark Plug: Type BPR4ES (NGK)
Spark Plug: Gap mm (in) 0.7–0.8 (0.028–0.031)
Noise Level* dB (A) 59
: Measured at rated operation from 7 m (23 ft) distance.
*
EF2400iS
171
6.0 (1.32, 1.59)
AE00707
GENERATOR
Unit
AC Output
Rated Voltage V 120
Rated frequency Hz 60
Rated current A 16.7
Rated Output kVA 2.0
Safty Device: Type Electronic
DC Output
Rated voltage V 12
Rated current A 8
Safety Device: Type DC protector
– 32 –
EF2400iS
Page 38
Y
W
W
W
W
W
W
W
Y
Y
Y
Y
Y
G
O
Y
L
R
Y
B/W
O
O
B/W
R
R
L
L
L
L
G
G
O
O
O
O
O
O
O
B/W
O
Y
Y
Y
Y
Y
L
L
O
O
O
O
L
L
G/Y
G/Y
G/Y
G/Y
G/Y
Y
B/W
Y
B/W
B/W
R
R
Br
Br
B
BW
B
O
B/W
R
R
Br
Br
R
Br
R
Br
B
W
B/W
G/Y
G/Y
B/W
L
L
q
e
w
r
@0
!9
!6
!7
!5
u
!3
!2
!8
!4
!1
!0
o
i
y
t
770-054
AE00751
WIRING DIAGRAM
1 Main coil
2 DC coil
3 Sub coil
4 DC rectifier
5 Control unit
6 AC pilot light
7 Parallel terminal
8 AC receptacle
9 Ground (Earth) terminal
0 Overload indicator light
q DC receptacle
w DC protector (breaker)
e Engine switch
r Oil warning light
t Speed limiter assembly
y Oil level gauge
u T.C.I. magneto
i T.C.I. unit
o Spark plug
p Stepping motor
Color code
B Black
Br Brown
G Green
L Blue
O Orange
R Red
W White
Y Yellow
B/W Black/White
– 33 –– 33 –
G/Y Green/Yellow
Page 39
PRINTED ON RECYCLED PAPER
PRINTED IN JAPAN
05
9 02 – 0.4 × 1
!
Page 40
OWNER’S
NAME
CUSTOMER WARRANTY REGISTRATION
ADDRESS
DATE SOLD
ZIP
AREA CODE
CITY &
STATE
MODEL
MACHINE SERIAL NUMBER
PHONE NUMBER ( )
IMPORTANT!:
accurately registered your purchase for warranty.
purchasers of products against the possibility of a safety-related defect and
9 Please complete and mail this form. It will help ensure that Yamaha has
recall.
9 Manufacturers are required to maintain a complete up-to-date list of all first
Private Commercial Rental
MAIL THIS TO YAMAHA MOTOR CORPORATION, U.S.A.
product:
9 Please check the box that best describes the primary area of usage of this
Page 41
YAMAHA MOTOR CORPORATION U.S.A.
P.O. BOX 6555
CYPRESS, CALIFORNIA 90630
ATTN: WARRANTY DEPARTMENT
STAMP
HERE
PLACE
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