Honda Automobiles GX25 User Manual

06/11/06 12:20:04 32Z6J600_001  
INTRODUCTION  
Thank you for purchasing a Honda engine. We want to help you to  
get the best results from your new engine and to operate it safely.  
This m anual contains inform ation on how to do that; please read it  
carefully before operating the engine. If a problem should arise, or  
if you have any questions about your engine, consult an  
authorized Honda servicing dealer.  
OWNER’S MANUAL  
MANUEL DE L’UTILISATEUR  
MANUAL DEL PROPIETARIO  
All inform ation in this publication is based on the latest product  
inform ation available at the tim e of printing. Honda Motor Co., Ltd.  
reserves the right to m ake changes at any tim e without notice and  
without incurring any obligation. No part of this publication m ay  
be reproduced without written perm ission.  
GX25·GX35  
This m anual should be considered a perm anent part of the engine  
and should rem ain with the engine if resold.  
Review the instructions provided with the equipm ent powered by  
this engine for any additional inform ation regarding engine  
startup, shutdown, operation, adjustm ents or any special  
m aintenance instructions.  
United States, Puerto Rico, and U.S. Virgin Islands:  
We suggest you read the warranty policy to fully understand its  
coverage and your responsibilities of ownership. The warranty  
policy is a separate docum ent that should have been given to you  
by your dealer.  
The engine exhaust from this product  
contains chem icals known to the State of  
California to cause cancer, birth defects  
or other reproductive harm .  
SAFETY MESSAGES  
Your safety and the safety of others are very im portant. We have  
provided im portant safety m essages in this m anual and on the  
engine. Please read these m essages carefully.  
CONTENTS  
INTRODUCTION........................1  
SPARK PLUG .......................11  
COOLING FINS ....................11  
FUEL FILTER AND FUEL  
TANK....................................12  
SPARK ARRESTER ..............12  
A safety m essage alerts you to potential hazards that could hurt  
you or others. Each safety m essage is preceded by a safety alert  
SAFETY MESSAGES .................1  
SAFETY INFORMATION ...........2  
SAFETY LABEL LOCATION ......2  
COMPONENT & CONTROL  
sym bol  
and one of three words, DANGER, WARNING, or  
CAUTION.  
LOCATION .................................2 HELPFUL TIPS &  
These signal words m ean:  
FEATURES .................................3 SUGGESTIONS .......................14  
You WILL be KILLED or SERIOUSLY  
HURT if you dont follow instructions.  
BEFORE OPERATION  
CHECKS .....................................4  
STORING YOUR ENGINE....14  
TRANSPORTING .................15  
OPERATION...............................4 TAKING CARE OF  
You CAN be KILLED or SERIOUSLY  
HURT if you dont follow instructions.  
SAFE OPERATING  
PRECAUTIONS ......................4 TECHNICAL & CONSUMER  
STARTING THE ENGINE .......4 INFORMATION........................16  
UNEXPECTED PROBLEMS .....16  
You CAN be HURT if you dont follow  
instructions.  
SETTING ENGINE SPEED......5  
STOPPING THE ENGINE .......6  
SERVICING YOUR ENGINE ......6  
THE IMPORTANCE OF  
MAINTENANCE .....................6  
MAINTENANCE SAFETY.......6  
SAFETY PRECAUTIONS ........7  
MAINTENANCE  
SCHEDULE.............................7  
REFUELING............................8  
ENGINE OIL............................8  
Recom m ended Oil .............8  
Oil Level Check...................9  
Serial Num ber Location ......16  
Rem ote Control Linkage......16  
Carburetor Modifications for  
High Altitude Operation ......17  
Oxygenated Fuels................17  
Em ission Control System  
Inform ation ..........................17  
Air Index...............................18  
Specifications ......................18  
Tuneup Specifications.........19  
Quick Reference  
Each m essage tells you what the hazard is, what can happen, and  
what you can do to avoid or reduce injury.  
DAMAGE PREVENTION MESSAGES  
You will also see other im portant m essages that are preceded by  
the word NOTICE.  
This word m eans:  
Inform ation ..........................19  
Wiring Diagram s .................19  
Your engine or other property can be dam aged if you  
dont follow instructions.  
Oil Change ..........................9 CONSUMER INFORMATION..20  
AIR CLEANER.......................10  
Inspection .........................10  
Cleaning ...........................10  
Distributor/Dealer Locator  
Inform ation ..........................20  
Custom er Service  
The purpose of these m essages is to help prevent dam age to your  
engine, other property, or the environm ent.  
Inform ation ..........................20  
2006 Honda Motor Co., Ltd. All Rights Reserved  
GX25NT·GX35NT  
32Z6J 602  
00X32-Z6J -6020  
ENGLISH  
1
05/12/16 14:58:34 32Z6J600_003  
Tiller type:  
FEATURES  
Centrifugal Clutch (Standard/Tiller type)  
STARTER GRIP  
TOP COVER  
RECOIL STARTER  
The centrifugal clutch autom atically engages and transm its power  
when engine speed is increased above approxim ately 4,200 rpm .  
At idle speed, the clutch is disengaged.  
Do not run the engine without m ounting it on equipm ent that  
includes the centrifugal clutch drum and housing, or centrifugal  
force will cause the clutch shoes to contact and dam age the  
engine case.  
AIR CLEANER  
FUEL TANK  
FUEL FILLER CAP  
PRIMING BULB  
OIL FILLER CAP/  
DIPSTICK  
MUFFLER  
(inside the top cover)  
SPARK PLUG  
(inside the top cover)  
ENGINE CONTROLS  
GX25  
CHOKE LEVER  
THROTTLE LEVER  
GX35  
CHOKE LEVER  
THROTTLE LEVER  
ENGLISH  
3
06/11/06 12:20:58 32Z6J600_004  
BEFORE OPERATION CHECKS  
OPERATION  
IS YOUR ENGINE READY TO GO?  
SAFE OPERATING PRECAUTIONS  
For your safety, and to m axim ize the service life of your  
equipm ent, it is very im portant to take a few m om ents before you  
operate the engine to check its condition. Be sure to take care of  
any problem you find, or have your servicing dealer correct it,  
before you operate the engine.  
Before operating the engine for the first tim e, please review the  
SAFETY INFORMATION section on page 2 and the BEFORE  
OPERATION CHECKS.  
Carbon m onoxide gas is toxic. Breathing it can cause  
unconsciousness and even kill you.  
Im properly m aintaining this engine, or failure to  
correct a problem before operation, can cause a  
m alfunction in which you can be seriously hurt or  
killed.  
Avoid any areas or actions that expose you to carbon  
m onoxide.  
Review the instructions provided with the equipm ent powered by  
this engine for any safety precautions that should be observed  
with engine startup, shutdown or operation.  
Always perform a pre-operation inspection before  
each operation, and correct any problem .  
Before beginning your pre-operation checks, be sure the engine is STARTING THE ENGINE  
level and the engine switch is in the OFF position.  
1. To start a cold engine, m ove the choke lever to the CLOSED  
position.  
Always check the following item s before you start the engine:  
Check the General Condition of the Engine  
To restart a warm engine, leave the choke lever in the OPEN  
position.  
1. Look around and underneath the engine for signs of oil or  
gasoline leaks.  
CHOKE LEVER  
CLOSED  
CLOSED  
2. Rem ove any excessive dirt or debris, especially around the  
m uffler and recoil starter.  
OPEN  
3. Look for signs of dam age.  
OPEN  
4. Check that all shields and covers are in place, and all nuts, bolts,  
and screws are tightened.  
Check the Engine  
2. Press the prim ing bulb repeatedly until fuel can be seen in the  
clear-plastic fuel-return tube.  
1. Check the fuel level (see page 8 ). Starting with a full tank will  
help to elim inate or reduce operating interruptions for refueling.  
FUEL RETURN TUBE  
(clear plastic tube)  
2. Check the engine oil level (see page 9 ). Running the engine  
with a low oil level can cause engine dam age.  
3. Check the air filter elem ent (see page 10 ). A dirty air filter  
elem ent will restrict air flow to the carburetor, reducing engine  
perform ance.  
4. Check the equipm ent powered by this engine.  
PRIMING BULB  
Review the instructions provided with the equipm ent powered  
by this engine for any precautions and procedures that should  
be followed before engine startup.  
3. Standard/Tiller type: Turn the engine switch on the equipm ent  
to the ON position.  
Pum p type: Turn the engine switch to the ON position.  
ON  
ENGINE SWITCH  
ON  
4
ENGLISH  
05/12/16 14:59:18 32Z6J600_005  
4. Pull the starter grip lightly until you feel resistance, then pull  
briskly. Return the starter grip gently.  
Tiller type  
1. Turn the engine switch on the equipm ent to the OFF position.  
2. Move the choke lever to the OPEN position.  
3. Hold the throttle lever on the equipm ent in the MAX. speed  
position.  
Standard/Pump type:  
Tiller type:  
4. Pull the starter grip 3 to 5 tim es.  
Follow the STARTING THE ENGINE procedure on page 4 and start  
the engine with the choke lever in the OPEN position.  
Pump type  
STARTER GRIP  
1. Turn the engine switch to the OFF position.  
2. Move the choke lever to the OPEN position.  
3. Hold the throttle lever in the MAX. speed position.  
4. Pull the starter grip 3 to 5 tim es.  
STARTER GRIP  
(EQUIPMENT SIDE)  
Follow the STARTING THE ENGINE procedure on page 4 and start  
the engine with the choke lever in the OPEN position.  
Do not allow the starter grip to snap back against the engine.  
Return it gently to prevent dam age to the starter.  
SETTING ENGINE SPEED  
5. If the choke lever was m oved to the CLOSED position to start the  
engine, gradually m ove it to the OPEN position as the engine  
warm s up.  
Standard/Tiller type:  
Position the throttle lever for the desired engine speed.  
CHOKE LEVER  
The throttle lever shown here will be connected to a rem ote  
control on the equipm ent powered by this engine. Refer to the  
instructions provided with the equipm ent for rem ote control  
inform ation and for engine speed recom m endations.  
CLOSED  
OPEN  
THROTTLE LEVER  
MIN.  
OPEN  
MAX.  
Hot Restart  
If the engine is operated at higher am bient tem peratures, then  
turned off and allowed to sit for a short tim e, it m ay not restart on  
the first pull.  
If necessary, use the following procedure:  
Pump type:  
IMPORTANT SAFETY PRECAUTION  
Turn the engine switch to the OFF position before perform ing the  
following procedure. This will prevent the engine from starting  
and running at m axim um speed when the throttle is in the MAX.  
speed position. If the engine starts with the throttle in the MAX.  
speed position, the equipm ent can m ove forward rapidly or the  
trim m er attachm ent can spin at m axim um speed. This m ay result  
in personal injury.  
Position the throttle lever for the desired engine speed.  
For engine speed recom m endations, refer to the instructions  
provided with the equipm ent powered by this engine.  
MIN.  
MAX.  
MAX.  
MIN.  
THROTTLE LEVER  
ENGLISH  
5
05/12/16 14:59:35 32Z6J600_006  
STOPPING THE ENGINE  
Standard/Tiller type:  
SERVICING YOUR ENGINE  
THE IMPORTANCE OF MAINTENANCE  
Good m aintenance is essential for safe, econom ical and trouble-  
To stop the engine in an em ergency, sim ply turn the engine switch free operation. It will also help reduce pollution.  
on the equipm ent to the OFF position. Under norm al conditions,  
use the following procedure.  
1. Move the throttle lever to the MIN. position.  
Im proper m aintenance, or failure to correct a  
problem before operation, can cause a m alfunction in  
which you can be seriously hurt or killed.  
The throttle lever shown here will be connected to a rem ote  
control on the equipm ent powered by this engine. Refer to the  
instructions provided with the equipm ent for rem ote control  
inform ation and for engine speed recom m endations.  
Always follow the inspection and m aintenance  
recom m endations and schedules in this owners  
m anual.  
THROTTLE LEVER  
To help you properly care for your engine, the following pages  
include a m aintenance schedule, routine inspection procedures,  
and sim ple m aintenance procedures using basic hand tools. Other  
service tasks that are m ore difficult, or require special tools, are  
best handled by professionals and are norm ally perform ed by a  
Honda technician or other qualified m echanic.  
MIN.  
The m aintenance schedule applies to norm al operating conditions.  
If you operate your engine under severe conditions, such as  
sustained high-load or high-tem perature operation, or use in  
unusually wet or dusty conditions, consult your servicing dealer  
for recom m endations applicable to your individual needs and use.  
Maintenance, replacement, or repair of the emission control  
devices and systems may be performed by any engine repair  
establishment or individual, using parts that are ‘‘certified’’ to  
EPA standards.  
2. Turn the engine switch on the equipm ent to the OFF position.  
Pump type:  
MAINTENANCE SAFETY  
Som e of the m ost im portant safety precautions follow. However,  
To stop the engine in an em ergency, sim ply turn the engine switch we cannot warn you of every conceivable hazard that can arise in  
to the OFF position. Under norm al conditions, use the following  
procedure.  
perform ing m aintenance. Only you can decide whether or not you  
should perform a given task.  
1. Move the throttle lever to the MIN. position.  
Failure to properly follow m aintenance instructions  
and precautions can cause you to be seriously hurt or  
killed.  
MIN.  
Always follow the procedures and precautions in this  
owners m anual.  
MIN.  
THROTTLE LEVER  
2. Turn the engine switch to the OFF position.  
OFF  
OFF  
ENGINE SWITCH  
6
ENGLISH  
06/11/06 12:22:11 32Z6J600_007  
SAFETY PRECAUTIONS  
MAINTENANCE SCHEDULE  
Make sure the engine is off before you begin any m aintenance  
or repairs. This will elim inate several potential hazards:  
Carbon monoxide poisoning from engine exhaust.  
Be sure there is adequate ventilation whenever you operate  
the engine.  
REGULAR SERVICE PERIOD (3)  
Perform at every  
Each  
use  
First  
Every 3 Every 6  
Every  
year  
or  
Every 2 Refer  
indicated m onth or  
operating hour interval,  
whichever com es first.  
m onth m onths m onths  
years  
or  
to  
or  
or  
or  
Page  
Burns from hot parts.  
10 hrs  
25 hrs  
50 hrs 100 hrs 300 hrs  
Let the engine and exhaust system cool before touching.  
ITEM  
Injury from moving parts.  
Engine oil  
Air cleaner  
Spark plug  
Tim ing belt  
Check level  
Change  
Check  
9
Do not run the engine unless instructed to do so.  
Read the instructions before you begin, and m ake sure you have  
the tools and skills required.  
To reduce the possibility of fire or explosion, be careful when  
working around gasoline. Use only a non-flam m able solvent,  
not gasoline, to clean parts. Keep cigarettes, sparks and flam es  
away from all fuel related parts.  
10  
11  
Clean  
(1)  
Check-adjust  
Replace  
Check  
After every 300 hrs (2) (4)  
Shop  
m anual  
Rem em ber that an authorized Honda servicing dealer knows your  
engine best and is fully equipped to m aintain and repair it.  
To ensure the best quality and reliability, use only new genuine  
Honda parts or their equivalents for repair and replacem ent.  
Spark arrester Clean  
(Applicable  
1214  
types)  
Exhaust Filter Clean  
(Applicable  
13  
11  
types)  
Engine cooling Check  
fins  
Nuts, bolts,  
fasteners  
Check  
4
(Retighten if necessary)  
Clutch shoes  
Check  
(2)  
Shop  
m anual  
Shop  
Idle speed  
Check-adjust  
Check-adjust  
Clean  
(2)  
(2)  
m anual  
Shop  
Valve  
clearance  
Com bustion  
cham ber  
Fuel filter  
Fuel tank  
Fuel tubes  
m anual  
Shop  
After every 300 hrs. (2)  
m anual  
12  
Check  
Clean  
Check  
12  
Every 2 years (Replace if necessary) (2)  
Every 2 years (Replace if necessary) (2)  
Shop  
m anual  
Shop  
Oil tube  
Check  
m anual  
(1) Service m ore frequently when used in dusty areas.  
(2) These item s should be serviced by your Honda servicing  
dealer, unless you have the proper tools and are m echanically  
proficient. Refer to the Honda shop m anual for service  
procedures.  
(3) For com m ercial use, log hours of operation to determ ine  
proper m aintenance intervals.  
(4) Check that there is no crack and abnorm al wear-out in the belt,  
and replace if it is abnorm al.  
Failure to follow this m aintenance schedule could result in non-  
warrantable failures.  
ENGLISH  
7
06/11/06 12:22:36 32Z6J600_008  
REFUELING  
To refuel, rest the engine a level surface with the fuel filler cap  
facing up, as shown. Rem ove the fuel filler cap, and fill the tank  
with gasoline to the bottom of the filler neck. Refuel carefully to  
avoid spilling fuel. Do not overfill. There should be no fuel in the  
filler neck. After refueling, tighten the fuel filler cap securely.  
Recommended Fuel  
Unleaded gasoline  
U.S.  
Pum p octane rating 86 or higher  
Except U.S.  
Research octane rating 91 or higher  
Pum p octane rating 86 or higher  
Keep gasoline away from appliance pilot lights, barbecues,  
electric appliances, power tools, etc.  
This engine is certified to operate on unleaded gasoline with a  
pum p octane rating of 86 or higher (a research octane rating of 91  
or higher).  
Spilled fuel is not only a fire hazard, it causes environm ental  
dam age. Wipe up spills im m ediately.  
Refuel in a well-ventilated area with the engine stopped. If the  
engine has been running, allow it to cool first. Never refuel the  
engine inside a building where gasoline fum es m ay reach flam es  
or sparks.  
ENGINE OIL  
Oil is a m ajor factor affecting perform ance and service life. Use  
4-stroke autom otive detergent oil.  
You m ay use regular unleaded gasoline containing no m ore than  
10% Ethanol (E10) or 5% Methanol by volum e. In addition,  
Recommended Oil  
SAE Viscosity Grades  
Methanol m ust contain cosolvents and corrosion inhibitors. Use of Use 4-stroke m otor oil that  
fuels with content of Ethanol or Methanol greater than shown  
above m ay cause starting and/or perform ance problem s. It m ay  
also dam age m etal, rubber, and plastic parts of the fuel system .  
Engine dam age or perform ance problem s that result from using a  
fuel with percentages of Ethanol or Methanol greater than shown  
above are not covered under warranty.  
m eets or exceeds the  
requirem ents for API service  
classification SJ or later (or  
equivalent). Always check the  
API service label on the oil  
container to be sure it includes  
the letters SJ or later (or  
equivalent).  
AMBIENT TEMPERATURE  
Gasoline is highly flam m able and explosive, and you  
can be burned or seriously injured when refueling.  
Stop engine and keep heat, sparks, and flam e away.  
Refuel only outdoors.  
SAE 10W-30 is recom m ended for general use. Other viscosities  
shown in the chart m ay be used when the average tem perature in  
your area is within the indicated range.  
Wipe up spills im m ediately.  
Standard/Tiller type:  
The recom m ended operating range of this engine is 5°C to 40°C  
(23°F to 104°F).  
Fuel can dam age paint and som e types of plastic. Be careful not to Pump type:  
spill fuel when filling your fuel tank. Dam age caused by spilled  
fuel is not covered under the Distributors Lim ited Warranty.  
The recom m ended operating range of this engine is 5°C to 40°C  
(41°F to 104°F).  
Never use stale or contam inated gasoline or oil/gasoline m ixture.  
Avoid getting dirt or water in the fuel tank.  
1. Check the fuel level by looking through the translucent fuel tank.  
2. If the fuel level is low, refuel in a well-ventilated area with the  
engine stopped. If the engine has been running, allow it to cool.  
Standard/Pump type:  
Tiller type:  
FUEL FILLER CAP  
MAXIMUM  
FUEL LEVEL  
8
ENGLISH  
06/11/06 12:22:57 32Z6J600_009  
Oil Level Check  
Check the engine oil level before each use, or every 10 hours if  
operated continuously.  
FUEL FILLER CAP  
Check the engine oil level with the engine stopped and in a level  
position.  
1. Rem ove the oil filler cap/dipstick and wipe it clean.  
2. Insert and rem ove the oil filler cap/dipstick without screwing it  
into the oil filler neck, then rem ove it to check the oil level shown  
on the dipstick.  
OIL FILLER NECK  
3. If the oil level is near or below the lower lim it m ark on the  
dipstick, fill to the bottom edge of the oil fill hole with the  
recom m ended oil (see page 8 ). To avoid overfilling or  
underfilling, be sure the engine is in a level position, as shown,  
while adding oil.  
OIL FILLER CAP/DIPSTICK  
4. With the engine in a level position, fill to the bottom edge of the  
oil fill hole with the recom m ended oil (see page 8 ).  
LOWER LIMIT  
Som e oil will rem ain in the engine after draining. When refilling  
with fresh oil, start with less than 80 cm (2.7 US oz, 2.8 lm p oz).  
Slowly add enough oil to fill to the bottom edge of the oil fill  
hole as shown below.  
OIL FILL HOLE  
(bottom edge)  
UPPER LIMIT  
Running the engine with a low or excessive oil level can cause  
engine dam age. This type of dam age is not covered by the  
Distributors Lim ited Warranty.  
UPPER LIMIT  
4. Reinstall the oil filler cap/dipstick and tighten securely.  
Running the engine with a low oil level can cause engine dam age.  
This type of dam age is not covered by the Distributors Lim ited  
Warranty.  
OIL FILLER CAP/DIPSTICK  
OIL FILL HOLE (bottom edge)  
Oil Change  
Drain the used oil when the engine is warm . Warm oil drains  
quickly and com pletely.  
UPPER LIMIT  
UPPER LIMIT  
1. Check that the fuel filler cap is tightened securely.  
2. Place a suitable container below the engine to catch the used oil.  
3. Rem ove the oil filler cap/dipstick and drain the oil into the  
container by tipping the engine toward the oil filler neck.  
Please dispose of used m otor oil in a m anner that is com patible  
with the environm ent. We suggest you take used oil in a sealed  
container to your local recycling center or service station for  
reclam ation. Do not throw it in the trash, pour it on the ground, or  
pour it down a drain.  
5. Reinstall the oil filler cap/dipstick securely.  
If any oil is spilled, m ake sure to wipe it up.  
ENGLISH  
9
06/11/06 12:23:14 32Z6J600_010  
AIR CLEANER  
Cleaning  
A dirty air cleaner will restrict air flow to the carburetor, reducing  
engine perform ance. If you operate the engine in very dusty areas,  
clean the air filter elem ent m ore often than specified in the  
MAINTENANCE SCHEDULE.  
1. Clean the filter elem ent in warm soapy water, rinse, and allow to  
dry thoroughly. Or clean in nonflam m able solvent and allow to  
dry.  
2. Dip the filter elem ent in clean engine oil, then squeeze out all  
excess oil. The engine will sm oke when started if too m uch oil is  
left in the elem ent.  
Operating the engine without an air filter elem ent, or with a  
dam aged air filter elem ent, will allow dirt to enter the engine,  
causing rapid engine wear. This type of dam age is not covered by  
the Distributors Lim ited Warranty.  
3. Wipe dirt from the air cleaner body and cover, using a m oist rag.  
Be careful to prevent dirt from entering the carburetor.  
GX25  
Inspection  
Standard/Pump type:  
Tiller type:  
Press the latch tab on the top of the air cleaner cover, and rem ove  
the cover. Inspect the filter elem ent. Clean or replace dirty filter  
elem ents. Always replace dam aged filter elem ents.  
Refer to this page for instructions that apply to the air cleaner and  
filter service.  
Reinstall the filter elem ent and air cleaner cover.  
GX25  
Standard/Pump type:  
Tiller type:  
AIR CLEANER BODY  
UPPER TAB  
FILTER ELEMENT  
FILTER ELEMENT  
AIR CLEANER BODY  
GX35  
Standard/Tiller type:  
CHOKE LEVER  
FILTER ELEMENT  
UPPER TAB  
UPPER TAB  
FILTER ELEMENT  
4. Reinstall the filter elem ent and air cleaner cover securely.  
LOWER TABS  
AIR CLEANER COVER  
UPPER TAB  
LOWER TABS  
AIR CLEANER COVER  
GX35  
Standard/Tiller type:  
UPPER LATCH TAB  
AIR CLEANER BODY  
CHOKE LEVER  
AIR CLEANER COVER  
UPPER LATCH TAB  
FILTER ELEMENT  
LOWER TABS  
10  
ENGLISH  
06/11/06 12:23:40 32Z6J600_011  
SPARK PLUG  
4. Inspect the spark plug.  
Replace it if dam aged or  
badly fouled, if the sealing  
washer is in poor condition,  
or if the electrode is worn.  
SIDE ELECTRODE  
Recommended Spark Plug: CM5H (NGK), CMR5H (NGK)  
0.600.70 mm  
(0.0240.028 in)  
The recom m ended spark plug has the correct heat range for  
norm al engine operating tem peratures.  
5. Measure the spark plug  
electrode gap with a wire-  
type feeler gauge. Correct the  
gap, if necessary, by carefully  
bending the side electrode.  
The gap should be:  
SEALING  
WASHER  
An incorrect spark plug can cause engine dam age.  
For good perform ance, the spark plug m ust be properly gapped  
and free of deposits.  
0.600.70 m m (0.0240.028 in)  
1. Rem ove the top cover.  
Loosen the 5 m m hex bolt with a hexagon wrench, then rem ove  
the top cover.  
6. Install the spark plug carefully,  
by hand, to avoid cross-  
threading.  
7. After the spark plug is seated, tighten with a 5/8-inch spark plug  
wrench to com press the sealing washer.  
Do not operate the engine when the top cover is  
rem oved.  
Do not pull the recoil starter handle when the top  
cover is rem oved.  
8. When installing a new spark plug, tighten 1/2 turn after the spark  
plug seats to com press the washer.  
You m ay be injured from the rotating parts or burned  
by the m uffler.  
9. When reinstalling the original spark plug, tighten 1/81/4 turn  
after the spark plug seats to com press the washer.  
TOP COVER  
5 mm HEX BOLT  
A loose spark plug can overheat and dam age the engine.  
Overtightening the spark plug can dam age the threads in the  
cylinder head.  
10.Attach the spark plug cap to the spark plug.  
11.  
Install the top cover, and tighten the 5 m m hex bolt securely  
with a hexagon wrench.  
COOLING FINS  
Inspection  
1. Loosen the 5 m m hex bolt, then rem ove the top cover.  
2. Disconnect the spark plug cap, and rem ove any dirt from around 2. Disconnect the spark plug cap.  
the spark plug area.  
3. Inspect the engine cooling fins, and clean out debris if necessary.  
3. Rem ove the spark plug with a 5/8-inch spark plug wrench.  
SPARK PLUG CAP  
SPARK PLUG  
COOLING FINS  
SPARK PLUG CAP  
4. Reconnect the spark plug cap.  
5. Install the top cover, and tighten the 5 m m hex bolt securely.  
ENGLISH  
11  
06/11/06 12:24:05 32Z6J600_012  
FUEL FILTER AND FUEL TANK  
SPARK ARRESTER (applicable types)  
Fuel filter inspection and Fuel tank cleaning  
The spark arrester m ay be standard or an optional part, depending  
on the engine type. In som e areas, it is illegal to operate an engine  
without a spark arrester. Check local laws and regulations. A spark  
arrester is available from authorized Honda servicing dealers.  
Gasoline is highly flam m able and explosive, and you  
can be burned or seriously injured when handling  
fuel.  
The spark arrester m ust be serviced every 100 hours to keep it  
functioning as designed.  
Stop engine and keep heat, sparks, and flam e away.  
Handle fuel only outdoors.  
If the engine has been running, the m uffler will be hot. Allow it to  
cool before servicing the spark arrester.  
Wipe up spills im m ediately.  
GX25  
Standard/Pump type:  
1. Check that the engine oil filler cap is tightened securely.  
Spark Arrester Removal  
2. Rem ove the fuel filler cap, and drain the fuel into an approved  
gasoline container by tipping the engine toward the fuel filler  
neck.  
1. Loosen the 5 m m hex bolt, then rem ove the top cover (see page  
11).  
2. Rem ove the 4 m m screws from the spark arrester, and rem ove  
the spark arrester from the m uffler.  
ENGINE OIL FILLER CAP  
MUFFLER  
SPARK PLUG  
4 mm SCREWS  
FUEL FILLER NECK  
SPARK ARRESTER  
3. Pull the fuel filter out through the fuel filler neck by hooking the  
black fuel tube with a piece of wire, such as a partly straightened Spark Arrester Cleaning & Inspection  
paper clip.  
1. Use a brush to rem ove carbon deposits from the spark arrester  
screen. Be careful to avoid dam aging the screen.  
4. Inspect the fuel filter. If the fuel filter is dirty, wash it gently with  
non-flam m able or high flash point solvent. If the fuel filter is  
excessively dirty, replace it.  
The spark arrester m ust be free of breaks and holes. Replace the  
spark arrester if it is dam aged.  
SPARK ARRESTER SCREEN  
FUEL FILTER  
2. Install the spark arrester in the reverse order of disassem bly.  
5. Rem ove water and dirt from the fuel tank by rinsing the inside of  
the fuel tank with non-flam m able or high flash point solvent.  
When you install the spark arrester, the spark arresters outlet  
m ust point to the side opposite the spark plug.  
6. Insert the fuel filter into the fuel tank and tighten the fuel filler  
cap securely.  
3. Install the top cover, and tighten the 5 m m hex bolt securely (see  
page 11 ).  
12  
ENGLISH  
06/11/06 12:24:32 32Z6J600_013  
Tiller type  
GX35  
Standard Type:  
Spark Arrester Removal  
Spark Arrester Removal  
1. Loosen the 5 m m hex bolt, then rem ove the top cover (see page  
11).  
1. Loosen the 5 m m hex bolt, then rem ove the top cover (see page  
11).  
2. Rem ove the 3 × 6 m m self-tapping screws from the spark  
arrester, and rem ove the spark arrester from the m uffler.  
2. Rem ove the 4 × 6 m m self-tapping screws from the spark  
arrester, and rem ove the spark arrester and exhaust filter from  
3 × 6 mm SELF-TAPPING SCREW  
the m uffler.  
SPARK PLUG  
MUFFLER  
SPARK ARRESTER  
OUTLET  
EXHAUST  
FILTER  
SPARK ARRESTER  
MUFFLER  
4 × 6 mm  
SELF-TAPPING  
SCREWS  
SPARK ARRESTER  
Spark Arrester Cleaning & Inspection  
Exhaust Filter Cleaning & Inspection  
1. Use a brush to rem ove carbon deposits from the spark arrester  
screen. Be careful to avoid dam aging the screen.  
Pinch the exhaust filter, and strike it lightly with a finger, to  
rem ove carbon deposits. Be careful not to strike it too hard.  
The exhaust filter m ust be free of breaks and holes. If it is  
The spark arrester m ust be free of breaks and holes. Replace the dam aged or fouled excessively, have it serviced by your Honda  
spark arrester if it is dam aged.  
dealer.  
SPARK ARRESTER SCREEN  
Spark Arrester Cleaning & Inspection  
1. Use a brush to rem ove carbon deposits from the spark arrester  
screen. Be careful to avoid dam aging the screen.  
2. Install the spark arrester in the reverse order of disassem bly.  
The spark arrester m ust be free of breaks and holes. Replace the  
spark arrester if it is dam aged.  
3. Install the top cover, and tighten the 5 m m hex bolt securely (see  
page 11 ).  
SPARK ARRESTER SCREEN  
2. Install the exhaust filter and spark arrester in the reverse order  
of disassem bly.  
When you install the spark arrester, the spark arresters outlet  
m ust point to the side opposite the spark plug.  
3. Install the top cover, and tighten the 5 m m hex bolt securely (see  
page 11 ).  
ENGLISH  
13  
06/11/06 12:25:00 32Z6J600_014  
Tiller type:  
Spark Arrester Removal  
HELPFUL TIPS & SUGGESTIONS  
STORING YOUR ENGINE  
1. Loosen the 5 m m hex bolt, then rem ove the top cover (see page  
11).  
Storage Preparation  
Proper storage preparation is essential for keeping your engine  
trouble-free and looking good. The following steps will help to  
keep rust and corrosion from im pairing your engines function and  
appearance, and will m ake the engine easier to start when you use  
it again.  
2. Rem ove the 4 × 6 m m self-tapping screws from the spark  
arrester, and rem ove the spark arrester from the m uffler.  
SPARK PLUG  
MUFFLER  
Cleaning  
EXHAUST FILTER  
If the engine has been running, allow it to cool for at least half an  
hour before cleaning. Clean all exterior surfaces, touch up any  
dam aged paint, and coat other areas that m ay rust with a light film  
of oil.  
SPARK ARRESTER  
Using a garden hose or pressure washing equipm ent can force  
water into the air cleaner or m uffler opening. Water in the air  
cleaner will soak the air filter, and water that passes through the  
air filter or m uffler can enter the cylinder, causing dam age.  
4 × 6 mm  
SELF-TAPPING  
SCREWS  
Fuel  
Gasoline will oxidize and deteriorate in storage. Deteriorated  
gasoline will cause hard starting, and it leaves gum deposits that  
clog the fuel system . If the gasoline in your engine deteriorates  
during storage, you m ay need to have the carburetor and other  
fuel system com ponents serviced or replaced.  
Exhaust Filter Cleaning & Inspection  
Pinch the exhaust filter, and strike it lightly with a finger, to  
rem ove carbon deposits. Be careful not to strike it too hard.  
The exhaust filter m ust be free of breaks and holes. If it is  
dam aged or fouled excessively, have it serviced by your Honda  
dealer.  
The length of tim e that gasoline can be left in your fuel tank and  
carburetor without causing functional problem s will vary with  
such factors as gasoline blend, your storage tem peratures, and  
whether the fuel tank is partially or com pletely filled. The air in a  
partially filled fuel tank prom otes fuel deterioration. Very warm  
storage tem peratures accelerate fuel deterioration. Fuel problem s  
m ay occur within a few m onths, or even less if the gasoline was  
not fresh when you filled the fuel tank.  
Fuel system dam age or engine perform ance problem s resulting  
from neglected storage preparation are not covered under the  
Distributors Lim ited Warranty.  
Spark Arrester Cleaning & Inspection  
1. Use a brush to rem ove carbon deposits from the spark arrester  
screen. Be careful to avoid dam aging the screen.  
You can extend fuel storage life by adding a gasoline stabilizer  
that is form ulated for that purpose, or you can avoid fuel  
The spark arrester m ust be free of breaks and holes. Replace the deterioration problem s by draining the fuel tank and carburetor.  
spark arrester if it is dam aged.  
Adding a Gasoline Stabilizer to Extend Fuel Storage Life  
SPARK ARRESTER SCREEN  
When adding a gasoline stabilizer, fill the fuel tank with fresh  
gasoline. If only partially filled, air in the tank will prom ote fuel  
deterioration during storage. If you keep a container of gasoline  
for refueling, be sure that it contains only fresh gasoline.  
1. Add gasoline stabilizer following the m anufacturers instructions.  
2. After adding a gasoline stabilizer, run the engine outdoors for 10  
m inutes to be sure that treated gasoline has replaced the  
2. Install the exhaust filter and spark arrester in the reverse order  
of disassem bly.  
untreated gasoline in the carburetor.  
3. Stop the engine.  
When you install the spark arrester, the spark arresters outlet  
m ust point to the side opposite the spark plug.  
3. Install the top cover, and tighten the 5 m m hex bolt securely (see  
page 11 ).  
14  
ENGLISH  
05/12/16 15:02:29 32Z6J600_015  
Draining the Fuel Tank and Carburetor  
Storage Precautions  
If your engine will be stored with gasoline in the fuel tank and  
carburetor, it is im portant to reduce the hazard of gasoline vapor  
ignition. Select a well-ventilated storage area away from any  
appliance that operates with a flam e, such as a furnace, water  
heater, or clothes dryer. Also avoid any area with a spark-  
producing electric m otor, or where power tools are operated.  
Gasoline is highly flam m able and explosive, and you  
can be burned or seriously injured when handling  
fuel.  
Stop engine and keep heat, sparks, and flam e away.  
Handle fuel only outdoors.  
Wipe up spills im m ediately.  
If possible, avoid storage areas with high hum idity, because that  
prom otes rust and corrosion.  
Keep the engine level in storage. Tilting can cause fuel or oil  
leakage.  
1. Make sure the engine oil filler cap is tightened securely.  
2. Rem ove the fuel filler cap and drain the fuel into an approved  
gasoline container by tipping the engine toward the fuel filler  
neck.  
With the engine and exhaust system cool, cover the engine to  
keep out dust. A hot engine and exhaust system can ignite or m elt  
som e m aterials. Do not use sheet plastic as a dust cover.  
A nonporous cover will trap m oisture around the engine,  
prom oting rust and corrosion.  
3. Press the prim ing bulb several tim es until there is no m ore fuel  
in the fuel return tube.  
Removal from Storage  
4. Tip the engine toward the fuel filler neck again to drain the fuel.  
Check your engine as described in the BEFORE OPERATION  
CHECKS section of this m anual (see page 4 ).  
FUEL RETURN TUBE  
ENGINE OIL FILLER CAP  
If the fuel was drained during storage preparation, fill the tank with  
fresh gasoline. If you keep a container of gasoline for refueling, be  
sure it contains only fresh gasoline. Gasoline oxidizes and  
deteriorates over tim e, causing hard starting.  
PRIMING BULB  
If the cylinder was coated with oil during storage preparation, the  
engine will sm oke briefly at startup. This is norm al.  
TRANSPORTING  
If the engine has been running, allow it to cool for at least 15  
m inutes before loading the engine-powered equipm ent on the  
transport vehicle. A hot engine and exhaust system can burn you  
and can ignite som e m aterials.  
FUEL FILLER NECK  
5. After all fuel has drained, reinstall the fuel filler cap securely.  
Engine Oil  
1. Change the engine oil (see page 9 ).  
2. Loosen the 5 m m hex bolt, then rem ove the top cover (see page  
11).  
3. Rem ove the spark plug (see page 11 ).  
4. Apply a couple of drops of clean engine oil into the cylinder.  
5. Install the top cover tem porarily.  
6. Pull the starter grip several tim es to distribute the oil in the  
cylinder.  
7. Rem ove the top cover, then reinstall the spark plug.  
8. Install the top cover, and tighten the 5 m m hex bolt securely (see  
page 11 ).  
9. Pull the starter grip slowly until resistance is felt.  
ENGLISH  
15  
05/12/16 15:02:48 32Z6J600_016  
TAKING CARE OF UNEXPECTED PROBLEMS  
TECHNICAL & CONSUMER INFORMATION  
ENGINE WILL  
NOT START  
1. Check control  
positions.  
Possible Cause  
Correction  
TECHNICAL INFORMATION  
ENGINE TYPE  
Choke open.  
Move lever to  
Serial Number Location  
Record the engine serial  
num ber, type and purchase  
date in the space below. You  
will need this inform ation when  
ordering parts and when  
m aking technical or warranty  
inquiries.  
CLOSED position  
unless the engine  
is warm .  
Turn engine switch  
to ON position.  
Engine switch  
OFF.(on the  
equipm ent)  
Out of fuel.  
2. Check fuel.  
Refuel (p. 8).  
Bad fuel; engine  
stored without  
treating or  
Drain fuel tank and  
carburetor (p. 15).  
Refuel with fresh  
gasoline(p. 8).  
ENGINE SERIAL NUMBER  
draining  
gasoline, or  
refueled with  
bad gasoline.  
Spark plug faulty,  
fouled, or  
Engine serial num ber: __ __ __ __ __ __ __ __ __ __ __  
Engine type: ___ ___ ___ ___  
3. Rem ove and  
inspect spark  
plug.  
Gap or replace  
spark plug (p. 11).  
im properly  
gapped.  
Date Purchased: ______ / ______ / ______  
Spark plug wet  
with fuel  
(flooded engine).  
Allow the spark  
plug to dry. After  
drying, install the  
spark plug and  
start the engine  
(p. 4).  
Remote Control Linkage  
Standard/Tiller type:  
4. Take engine to  
an authorized  
Honda  
servicing  
dealer, or refer  
to shop  
Fuel filter  
restricted,  
Replace or repair  
faulty com ponents  
as necessary.  
The throttle control lever is provided with a fitting for cable  
attachm ent.  
carburetor  
m alfunction,  
ignition  
m alfunction,  
valves stuck, etc.  
Rem ove the air cleaner cover (see page 10 ) for access to the  
throttle lever and cable fitting.  
m anual.  
Attach the throttle cable as shown in the illustration.  
ENGINE LACKS  
POWER  
Possible Cause  
Correction  
To adjust the throttle cable, follow the equipm ent m anufacturers  
instructions.  
1. Check air filter.  
Filter elem ent  
restricted.  
Clean or replace  
filter elem ent  
CABLE ATTACHMENT FITTING  
(p. 10).  
2. Check fuel.  
Bad fuel; engine  
stored without  
treating or  
Drain fuel tank and  
carburetor (p. 15).  
Refuel with fresh  
gasoline (P. 8).  
draining  
gasoline, or  
refueled with  
bad gasoline.  
Fuel filter  
restricted,  
carburetor  
3. Take engine to  
an authorized  
Honda  
Replace or repair  
faulty com ponents  
as necessary.  
LOCK NUT  
servicing  
dealer, or refer  
to shop  
m alfunction,  
ignition  
m alfunction,  
valves stuck, etc.  
m anual.  
STAY  
THROTTLE CABLE  
ADJUST NUT  
16  
ENGLISH  
06/11/07 17:37:03 32Z6J600_017  
Carburetor Modifications for High Altitude Operation  
Emission Control System Information  
At high altitude, the standard carburetor air-fuel m ixture will be  
too rich. Perform ance will decrease, and fuel consum ption will  
increase. A very rich m ixture will also foul the spark plug and  
cause hard starting. Operation at an altitude that differs from that  
at which this engine was certified, for extended periods of tim e,  
m ay increase em issions.  
Source of Emissions  
The com bustion process produces carbon m onoxide, oxides of  
nitrogen, and hydrocarbons. Control of hydrocarbons and oxides  
of nitrogen is very im portant because, under certain conditions,  
they react to form photochem ical sm og when subjected to  
sunlight. Carbon m onoxide does not react in the sam e way, but it  
is toxic.  
High altitude perform ance can be im proved by specific  
m odifications to the carburetor. If you always operate your engine Honda utilizes lean carburetor settings and other system s to  
at altitudes above 1,500 m eters (5,000 feet), have your servicing  
dealer perform this carburetor m odification. This engine, when  
operated at high altitude with the carburetor m odifications for  
high altitude use, will m eet each em ission standard throughout its  
useful life.  
reduce the em issions of carbon m onoxide, oxides of nitrogen, and  
hydrocarbons.  
The U.S., California Clean Air Acts and Environment Canada  
EPA, California and Canadian regulations require all  
m anufacturers to furnish written instructions describing the  
operation and m aintenance of em ission control system s.  
Even with carburetor m odification, engine horsepower will  
decrease about 3.5% for each 300-m eter (1,000-foot) increase in  
altitude. The effect of altitude on horsepower will be greater than  
this if no carburetor m odification is m ade.  
The following instructions and procedures m ust be followed in  
order to keep the em issions from your Honda engine within the  
em ission standards.  
When the carburetor has been m odified for high altitude operation,  
the air-fuel m ixture will be too lean for low altitude use. Operation  
at altitudes below 1,500 m eters (5,000 feet) with a m odified  
carburetor m ay cause the engine to overheat and result in serious  
engine dam age. For use at low altitudes, have your servicing  
dealer return the carburetor to original factory specifications.  
Tampering and Altering  
Tam pering with or altering the em ission control system m ay  
increase em issions beyond the legal lim it. Am ong those acts that  
constitute tam pering are:  
Rem oval or alteration of any part of the intake, fuel, or exhaust  
system s.  
Altering or defeating the governor linkage or speed-adjusting  
m echanism to cause the engine to operate outside its design  
param eters.  
Problems That May Affect Emissions  
If you are aware of any of the following sym ptom s, have your  
engine inspected and repaired by your servicing dealer.  
Hard starting or stalling after starting.  
Rough idle.  
Misfiring or backfiring under load.  
Afterburning (backfiring).  
Black exhaust sm oke or high fuel consum ption.  
Replacement Parts  
The em ission control system s on your Honda engine were  
designed, built, and certified to conform with EPA, California and  
Canadian em ission regulations. We recom m end the use of  
genuine Honda parts whenever you have m aintenance done.  
These original-design replacem ent parts are m anufactured to the  
sam e standards as the original parts, so you can be confident of  
their perform ance. The use of replacem ent parts that are not of the  
original design and quality m ay im pair the effectiveness of your  
em ission control system .  
A m anufacturer of an afterm arket part assum es the responsibility  
that the part will not adversely affect em ission perform ance. The  
m anufacturer or rebuilder of the part m ust certify that use of the  
part will not result in a failure of the engine to com ply with  
em ission regulations.  
ENGLISH  
17  
06/11/06 12:26:52 32Z6J600_018  
Maintenance  
Specifications  
GX25 (Basic types)  
Type  
Follow the m aintenance schedule on page 7 . Rem em ber that this  
schedule is based on the assum ption that your m achine will be  
used for its designed purpose. Sustained high-load or high-  
tem perature operation, or use in unusually wet or dusty conditions,  
will require m ore frequent service.  
S3  
W3  
T3  
(Standard)  
(Without tank  
guard)  
(Pum p)  
(Tiller)  
Air Index  
Power equipm ent  
description code  
Length  
GCART  
An Air Index Inform ation hang tag/label is applied to engines  
certified to an em ission durability tim e period in accordance with  
the requirem ents of the California Air Resources Board.  
192 m m  
(7.6 in)  
221 m m  
(8.7 in)  
247 m m  
(9.7 in)  
221 m m  
(8.7 in)  
192 m m  
(7.6 in)  
210 m m  
(8.3 in)  
Width  
The bar graph is intended to provide you, our custom er, the ability  
to com pare the em issions perform ance of available engines. The  
lower the Air Index, the less pollution.  
Height  
230 m m  
(9.1 in)  
2.78 kg  
(6.13 lbs)  
230 m m  
(9.1 in)  
3.10 kg  
(6.83 lbs)  
236 m m  
(9.3 in)  
2.96 kg  
(6.53 lbs)  
Dry weight  
(Without clutch)  
Engine type  
Displacem ent  
[Bore × Stroke]  
Max. output  
Max. torque  
The durability description is intended to provide you with  
inform ation relating to the engines em ission durability period.  
The descriptive term indicates the useful life period for the engines  
em ission control system . See your Em ission Control System  
Warranty for additional inform ation.  
4-stroke, overhead cam shaft, single cylinder  
25 cm (1.5 cu-in)  
[35 × 26 m m (1.4 × 1.0 in)]  
0.72 kW (1.0 PS, 1.0 bhp) at 7,000 rpm  
1.0 N·m (0.10 kgf·m , 0.74 lbf·ft)  
at 5,000 rpm  
Descriptive Term Applicable to Emissions Durability Period  
Engine oil  
0.08 (0.08 US qt , 0.07 Im p qt)  
Moderate  
50 hours [080 cm (080 cc) inclusive]  
125 hours [greater than 80 cm (80 cc)]  
125 hours [080 cm (080 cc) inclusive]  
250 hours [greater than 80 cm (80 cc)]  
300 hours [080 cm (080 cc) inclusive]  
500 hours [greater than 80 cm (80 cc)]  
1,000 hours [225 cm (225 cc) and greater]  
capacity  
Fuel tank  
capacity  
Fuel consum ption  
Cooling system  
Ignition system  
PTO shaft rotation  
0.57 (0.151 US gal ,  
0.58 (0.153 US gal ,  
0.125 Im p gal)  
Interm ediate  
Extended  
0.128 Im p gal)  
0.54 /h at 7,000 rpm  
Forced air  
Transistorized m agneto  
Counterclockwise  
The Air Index Inform ation hang tag/label m ust rem ain on the  
engine until it is sold. Rem ove the hang tag before operating the  
engine.  
GX35 (Basic types)  
S3  
T3  
(Tiller)  
TR3  
(Tiller)  
Type  
(Standard)  
(Without tank  
guard)  
Power equipm ent  
description code  
Length  
GCAST  
198 m m  
(7.8 in)  
198 m m  
(7.8 in)  
198 m m  
(7.8 in)  
Width  
234 m m  
(9.2 in)  
243 m m  
(9.6 in)  
243 m m  
(9.6 in)  
Height  
240 m m  
(9.4 in)  
242 m m  
(9.5 in)  
242 m m  
(9.5 in)  
Dry weight  
(Without clutch)  
Engine type  
Displacem ent  
[Bore × Stroke]  
Max. output  
Max. torque  
3.33 kg  
(7.34 lbs)  
3.52 kg  
(7.76 lbs)  
3.52 kg  
(7.76 lbs)  
4-stroke, overhead cam shaft, single cylinder  
35.8 cm (2.18 cu-in)  
[39 × 30 m m (1.5 × 1.2 in)]  
1.0 kW (1.4 PS, 1.3 bhp) at 7,000 rpm  
1.6 N·m (0.16 kgf·m , 1.2 lbf·ft)  
at 5,500 rpm  
Engine oil  
0.10 (0.11 US qt , 0.09 Im p qt)  
capacity  
Fuel tank  
capacity  
0.63 (0.166 US gal ,  
0.70 (0.185 US gal ,  
0.139 Im p gal)  
0.154 Im p gal)  
Fuel consum ption  
Cooling system  
Ignition system  
PTO shaft rotation  
0.71 /h at 7,000 rpm  
Forced air  
Transistorized m agneto  
Counterclockwise  
18  
ENGLISH  
06/11/06 12:27:06 32Z6J600_019  
Tuneup Specifications  
Wiring Diagrams  
Standard/Tiller type:  
ITEM  
SPECIFICATION  
MAINTENANCE  
Spark plug gap  
0.600.70 m m  
Refer to page: 11  
(0.0240.028 in)  
3,100±200 rpm  
IN: 0.08 ± 0.02 m m  
EX: 0.11 ± 0.02 m m  
Idle speed  
Valve clearance  
(cold)  
See your  
authorized  
Honda dealer  
Other  
No other adjustm ents needed.  
specifications  
Quick Reference Information  
Fuel  
Unleaded gasoline  
(Refer to page 8)  
U.S.  
Pum p octane rating 86 or higher  
Except Research octane rating 91 or higher  
U.S. Pum p octane rating 86 or higher  
Engine oil  
SAE 10W-30, API SJ or later, for general use.  
Refer to page 8.  
Pump type:  
Spark plug  
Maintenance  
CM5H (NGK)  
CMR5H (NGK)  
Before each use:  
Check engine oil level. Refer to page 9.  
Check air filter. Refer to page 10.  
First 10 hours:  
Change engine oil. Refer to page 9.  
Subsequent:  
Refer to the m aintenance schedule on page 7.  
OFF  
ON  
(1) SPARK PLUG  
(2) IGNITION COIL  
(3) Engine switch on the equipm ent  
powered by the engine.  
(4) ENGINE SWITCH  
Bl  
Black  
ENGLISH  
19  
05/12/16 15:04:22 32Z6J600_020  
CONSUMER INFORMATION  
Canada:  
Honda Canada, Inc.  
Distributor/Dealer Locator Information  
715 Milner Avenue  
Toronto, ON  
M1B 2K8  
United States, Puerto Rico, and U.S. Virgin Islands:  
Call (800) 426-7701  
Telephone: (888) 9HONDA9  
(888) 946-6329  
Toll free  
Canada:  
Call (888) 9HONDA9  
English: (416) 299-3400  
French: (416) 287-4776  
Facsim ile: (877) 939-0909  
(416) 287-4776  
Local Toronto dialing area  
Local Toronto dialing area  
Toll free  
Local Toronto dialing area  
For European Area:  
For European Area:  
Honda Europe NV.  
European Engine Center  
Customer Service Information  
Servicing dealership personnel are trained professionals. They  
should be able to answer any question you m ay have. If you  
encounter a problem that your dealer does not solve to your  
satisfaction, please discuss it with the dealerships m anagem ent.  
The Service Manager, General Manager, or Owner can help.  
Alm ost all problem s are solved in this way.  
All Other Areas:  
Please contact the Honda distributor in your area for assistance.  
United States, Puerto Rico, and U.S. Virgin Islands:  
If you are dissatisfied with the decision m ade by the dealerships  
m anagem ent, contact the Honda Regional Engine Distributor for  
your area.  
If you are still dissatisfied after speaking with the Regional Engine  
Distributor, you m ay contact the Honda Office as shown.  
All Other Areas:  
If you are dissatisfied with the decision m ade by the dealerships  
m anagem ent, contact the Honda Office as shown.  
Honda’s Office》  
When you write or call, please provide this inform ation:  
Equipm ent m anufacturers nam e and m odel num ber that the  
engine is m ounted on  
Engine m odel, serial num ber, and type (see page 16 )  
Nam e of dealer who sold the engine to you  
Nam e, address, and contact person of the dealer who services  
your engine  
Date of purchase  
Your nam e, address and telephone num ber  
A detailed description of the problem  
United States, Puerto Rico, and U.S. Virgin Islands:  
American Honda Motor Co., Inc.  
Power Equipm ent Division  
Custom er Relations Office  
4900 Marconi Drive  
Alpharetta, GA 30005-8847  
Or telephone: (770) 497-6400, 8:30 am - 8:00 pm EST  
20  
ENGLISH  

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