Honda Power Equipment GXV340 User Manual
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 manual contains information 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.
All information in this publication is based on the latest product
information available at the time of printing. Honda Motor Co., Ltd.
reserves the right to make changes at any time without notice and
without incurring any obligation. No part of this publication may
be reproduced without written permission.
This manual should be considered a permanent part of the engine
and should remain with the engine if resold.
Review the instructions provided with the equipment powered by
this engine for any additional information regarding engine
startup, shutdown, operation, adjustments or any special
maintenance 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 document that should have been given to you
by your dealer.
SAFETY MESSAGES
OWNER’S MANUAL
MANUEL DE L’UTILISATEUR
MANUAL DEL PROPIETARIO
GXV340 · GXV390
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects
or other reproductive harm.
ENGLISHFRANÇAISESPAÑOL
Your safety and the safety of others is very important. We have
provided important safety messages in this manual and on the
engine. Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt
you or others. Each safety message is preceded by a safety alert
symbol and one of three words, DANGER, WARNING, or
CAUTION.
These signal words mean:
You WILL be KILLED or SERIOUSLY
HURT if you don’t follow instructions.
You CAN be KILLED or SERIOUSLY
HURT if you don’t follow instructions.
You CAN be HURT if you don’t follow
instructions.
Each message 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 important messages that are preceded by
the word NOTICE.
This word means:
Your engine or other property can be damaged if you
don’t follow instructions.
The purpose of these messages is to help prevent damage to your
engine, other property, or the environment.
CONTENTS
.......................INTRODUCTION .1
................SAFETY MESSAGES .1
..........SAFETY INFORMATION .2
COMPONENT & CONTROL
................................LOCATION .2
................................FEATURES .3
BEFORE OPERATION
....................................CHECKS .3
..............................OPERATION .4
SAFE OPERATING
.....................PRECAUTIONS .4
THE IMPORTANCE OF
....................MAINTENANCE .7
MAINTENANCE
............................SCHEDULE .7
...........................REFUELING .8
...........................ENGINE OIL .8
............Recommended Oil .8
..................Oil Level Check .9
.........................Oil Change .9
......................AIR CLEANER .10
........................Inspection .10
..........................Cleaning .10
.....SAFETY LABEL LOCATION .2
......STARTING THE ENGINE .4
......STOPPING THE ENGINE .5
.....SETTING ENGINE SPEED .6
.....SERVICING YOUR ENGINE .7
......MAINTENANCE SAFETY .7
.......SAFETY PRECAUTIONS .7
......................SPARK PLUG .10
.............SPARK ARRESTER .11
HELPFUL TIPS &
......................SUGGESTIONS .11
...STORING YOUR ENGINE .11
................TRANSPORTING .13
TAKING CARE OF
....UNEXPECTED PROBLEMS .13
TECHNICAL & CONSUMER
.......................INFORMATION .14
.....Serial Number Location .14
Battery Connections for
....................Electric Starter .14
.....Remote Control Linkage .14
Carburetor Modifications for
.....High Altitude Operation .14
...............Oxygenated Fuels .15
Emission Control System
.........................Information .15
..............................Air Index .16
.....................Specifications .16
........Tuneup Specifications .16
Quick Reference
.........................Information .17
................Wiring Diagrams .17
.CONSUMER INFORMATION .18
Distributor/Dealer Locator
.........................Information .18
Customer Service
.........................Information .18
2005 Honda Motor Co., Ltd. All Rights Reserved
37Z5PA00
00X37-Z5P-A000
−
EM3
GXV340UT2·GXV390UT1
PRINTED IN U.S.
2005.0
8
ENGLISH
1
Understand the operation of all controls and learn how to stop
the engine quickly in case of emergency. Make sure the operator
receives adequate instruction before operating the equipment.
Do not allow children to operate the engine. Keep children and
pets away from the area of operation.
Your engine’s exhaust contains poisonous carbon monoxide.
Do not run the engine without adequate ventilation, and never
run the engine indoors.
The engine and exhaust become very hot during operation.
Keep the engine at least 1 meter (3 feet) away from buildings
and other equipment during operation. Keep flammable
materials away, and do not place anything on the engine while it
is running.
COMPONENT & CONTROL LOCATIONSAFETY INFORMATION
OIL FILLER CAP/
DIPSTICK
OIL DRAIN PLUG
RECOIL STARTER
STARTER GRIP
SPARK PLUG
SAFETY LABEL LOCATION
This label warns you of potential hazards that can cause serious
injury. Read it carefully.
If the label comes off or becomes hard to read, contact your Honda
dealer for replacement.
For Canadian types only:
French label comes with
the engine.
ELECTRIC STARTER
(applicable types)
FUEL TANK
AIR CLEANER
MUFFLER
FUEL FILLER CAP
ENGINE CONTROL
Gasoline is highly flammable and explosive.
Turn engine off and let cool before refueling.
The engine emits toxic poisonous carbon
FUEL VALVE LEVER
CONTROL LEVER
monoxide gas. Do not run in an enclosed area.
Read Owner’s Manual before operation.
2
ENGLISH
BEFORE OPERATION CHECKSFEATURES
OIL ALERT SYSTEM (applicable types)
The Oil Alert
caused by an insufficient amount of oil in the crankcase. Before
the oil level in the crankcase can fall below a safe limit, the Oil
Alert
system will sound a buzzer, warning you that oil needs to be
added to the engine.
The Oil Alert
checking the oil. Check the oil level prior to each use.
The ‘‘Oil Alert
added to the crankcase. If the buzzer sounds, stop the engine and
add oil (see page ).
system is designed to prevent engine damage
system is not designed to be used in place of
’’ buzzer will arm you when engine oil needs to be
9
The buzzer indicates insufficient oil. Running the engine with
insufficient oil can cause serious engine damage.
IS YOUR ENGINE READY TO GO?
For your safety, and to maximize the service life of your
equipment, it is very important to take a few moments 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.
Improperly maintaining this engine, or failure to
correct a problem before operation, can cause a
malfunction in which you can be seriously hurt or
killed.
Always perform a preoperation inspection before
each operation, and correct any problem.
Before beginning your preoperation checks, be sure the engine is
level and the engine switch is in the OFF position.
Always check the following items before you start the engine:
Check the General Condition of the Engine
1.
Look around and underneath the engine for signs of oil or
gasoline leaks.
Remove any excessive dirt or debris, especially around the
2.
muffler and recoil starter.
Look for signs of damage.
3.
Check that all shields and covers are in place, and all nuts, bolts,
4.
and screws are tightened.
Check the Engine
Check the fuel level (see page ). Starting with a full tank will
1.
help to eliminate or reduce operating interruptions for refueling.
Check the engine oil level (see page ). Running the engine
2.
with a low oil level can cause engine damage.
The ‘‘Oil Alert ’’ buzzer (applicable types) will warn you when
engine oil needs to be added to the crankcase. If the buzzer
sounds, stop the engine and add oil.
3.
Check the air filter element (see page ). A dirty air filter
element will restrict air flow to the carburetor, reducing engine
performance.
Check the equipment powered by this engine.
4.
Review the instructions provided with the equipment powered
by this engine for any precautions and procedures that should
be followed before engine startup.
8
9
10
ENGLISH
3
OPERATION
SAFE OPERATING PRECAUTIONS
Before operating the engine for the first time, please review the
SAFETY INFORMATION
OPERATION CHECKS
on page .
section on page and the
3
2
BEFORE
STARTING THE ENGINE
1.
Move the fuel valve lever to the ON position.
FUEL VALVE LEVER
Carbon monoxide gas is toxic. Breathing it can cause
unconsciousness and even kill you.
Avoid any areas or actions that expose you to carbon
monoxide.
Review the instructions provided with the equipment powered by
this engine for any safety precautions that should be observed
with engine startup, shutdown or operation.
Control Lever
The control lever operates the engine switch, throttle, and choke.
OFF
––––––––
Stop the engine by switching off the ignition system.
All other control lever positions leave the ignition
system switched on.
MIN.
MAX.
–––––––
For running the engine at idle speed.
––––––
For restarting a warm engine, and for running the
engine at maxinum speed.
Enriches the fuel mixture for starting a cold engine.
CHOKE
–––––
The control lever shown here will be connected to a remote
control on the equipment powered by this engine. Refer to the
instructions provided with that equipment for remote control
information.
ON
2.
To start a cold engine, move the control lever to the CHOKE
position.
CONTROL LEVER
CHOKE
MAX.
To restart a warm engine, leave the control lever in the MAX.
position.
The control lever shown here will be connected to a remote
control on the equipment powered by this engine. Refer to the
instructions provided with that equipment for remote control
information.
CONTROL LEVER
MMIINN..
OOFFFF
CHOKE
MAX.
3.
Turn the engine switch to the ON position.
There may be a remote engine switch mounted on the
equipment powered by this engine. Refer to the instructions
provided with the equipment for remote control information.
4
ENGLISH
4.
Operate the starter.
STOPPING THE ENGINE
RECOIL STARTER
Pull the starter grip lightly until you feel resistance, then pull
briskly. Return the starter grip gently.
SSTTAARRTTEERR GGRRIIPP
Do not allow the starter grip to snap back against the engine.
Return it gently to prevent damage to the starter.
ELECTRIC STARTER (applicable types):
The electric starter will be connected to a remote control on the
equipment powered by this engine. Refer to the instructions
provided with the equipment for remote control information.
Turn the engine switch key to the START position, and hold it
there until the engine starts.
To stop the engine in an emergency, simply move the control
lever to the OFF position. Under normal conditions, use the
following procedure.
1.
Move the control lever to the OFF position.
The control lever shown here will be connected to a remote
control on the equipment powered by this engine. Refer to the
instructions provided with the equipment for remote control
information.
CONTROL LEVER
OOFFFF
2.
Turn the engine switch to the OFF position.
There may be a remote engine switch mounted on the
equipment powered by this engine. Refer to the instructions
provided with the equipment for remote control information.
3.
Turn the fuel valve lever to the OFF position.
If the engine fails to start within 5 seconds, release the engine
switch key, and wait at least 10 seconds before operating the
starter again.
Using the electric starter for more than 5 seconds at a time will
overheat the starter motor and can damage it.
When the engine starts, release the engine switch key, allowing
it to return to the ON position.
5.
If the control lever was moved to the CHOKE position to start the
engine, gradually move it to the MAX. or MIN. position as the
engine warms up.
The control lever shown here will be connected to a remote
control on the equipment powered by this engine. Refer to the
instructions provided with that equipment for remote control
information.
CONTROL LEVER
MAX.
FUEL VALVE LEVER
OOFFFF
MMIINN..
ENGLISH
5
SETTING ENGINE SPEED
Position the control lever for the desired engine speed.
The control lever shown here will be connected to a remote
control on the equipment powered by this engine. Refer to the
instructions provided with that equipment for remote control
information and engine speed recommendations.
CONTROL LEVER
MMAAXX..
MMIINN..
6
ENGLISH
SERVICING YOUR ENGINE
THE IMPORTANCE OF MAINTENANCE
Good maintenance is essential for safe, economical and troublefree operation. It will also help reduce pollution.
Improper maintenance, or failure to correct a
problem before operation, can cause a malfunction in
which you can be seriously hurt or killed.
Always follow the inspection and maintenance
recommendations and schedules in this owner’s
manual.
To help you properly care for your engine, the following pages
include a maintenance schedule, routine inspection procedures,
and simple maintenance procedures using basic hand tools. Other
service tasks that are more difficult, or require special tools, are
best handled by professionals and are normally performed by a
Honda technician or other qualified mechanic.
The maintenance schedule applies to normal operating conditions.
If you operate your engine under severe conditions, such as
sustained high-load or high-temperature operation, or use in
unusually wet or dusty conditions, consult your servicing dealer
for recommendations 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.
MAINTENANCE SAFETY
Some of the most important safety precautions follow. However,
we cannot warn you of every conceivable hazard that can arise in
performing maintenance. Only you can decide whether or not you
should perform a given task.
MAINTENANCE SCHEDULE
REGULAR SERVICE PERIOD (3)
Perform at every
indicated month or
operating hour interval,
whichever comes first.
ITEM
Engine oil
Air filter
Spark plug
Spark arrester
()
applicable types
Idle speed
Valve clearance
Combustion
chamber
Fuel tank &
filter
Fuel tube
Replace paper element type only.
＊
(1)
Service more frequently when used in dusty areas.
(2)
These items should be serviced by your servicing dealer,
Check level
Change
Check
Clean
Replace
Check-adjust
Replace
Clean
Check-adjust
Check-adjust
Clean
Clean
Check
Each
Use
Every 3
First
Months
Months
Month
or
or
or
100 Hrs
50 Hrs
20 Hrs
(1)
After every 250 Hrs. (2)
Every 2 years
(Replace if necessary) (2)
Year
or
300 Hrs
＊
(2)
(2)
(2)
Shop
manual
Shop
manual
Shop
manual
Shop
manual
Shop
manual
Refer
Every
Every 6
unless you have the proper tools and are mechanically
proficient. Refer to Honda shop manual for service procedures.
(3)
For commercial use, log hours of operation to determine
proper maintenance intervals.
Failure to follow this maintenance schedule could result in nonwarrantable failures.
to
Page
9
9
10
10
11
Failure to properly follow maintenance instructions
and precautions can cause you to be seriously hurt or
killed.
Always follow the procedures and precautions in this
owner’s manual.
SAFETY PRECAUTIONS
Make sure the engine is off before you begin any maintenance
or repairs. This will eliminate several potential hazards:
Carbon monoxide poisoning from engine exhaust.
−
Be sure there is adequate ventilation whenever you operate
the engine.
Burns from hot parts.
−
Let the engine and exhaust system cool before touching.
Injury from moving parts.
−
Do not run the engine unless instructed to do so.
Read the instructions before you begin, and make 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 nonflammable solvent, not
gasoline, to clean parts. Keep cigarettes, sparks and flames
away from all fuel related parts.
Remember that an authorized Honda servicing dealer knows your
engine best and is fully equipped to maintain and repair it.
To ensure the best quality and reliability, use only new genuine
Honda parts or their equivalents for repair and replacement.
ENGLISH
7
REFUELING
Recommended Fuel
Unleaded gasoline
U.S.
Except U.S.
Pump octane rating 86 or higher
Research octane rating 91 or higher
Pump octane rating 86 or higher
Refuel in a well-ventilated area before starting the engine. If the
engine has been running, allow it to cool. Refuel carefully to avoid
spilling fuel. Do not fill the fuel tank completely. Fill tank to the
upper limit level below the filler neck of the fuel tank to allow for
fuel expansion. It may be necessary to lower the fuel level
depending on operating conditions. After refueling, tighten the
fuel filler cap securely.
This engine is certified to operate on unleaded gasoline. Unleaded
gasoline produces fewer engine and spark plug deposits and
extends exhaust system life.
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when refueling.
Stop engine and keep heat, sparks, and flame away.
Refuel only outdoors.
Wipe up spills immediately.
Fuel can damage paint and some types of plastic. Be careful not to
spill fuel when filling your fuel tank. Damage caused by spilled
fuel is not covered under the
Distributor’s Limited Warranty.
Never use stale or contaminated gasoline or oil/gasoline mixture.
Avoid getting dirt or water in the fuel tank.
Occasionally you may hear a light ‘‘spark knock’’ or ‘‘pinging’’
(metallic rapping noise) while operating under heavy loads. This is
no cause for concern.
If spark knock or pinging occurs at a steady engine speed, under
normal load, change brands of gasoline. If spark knock or pinging
persists, see an authorized Honda servicing dealer.
Never refuel the engine inside a building where gasoline fumes
may reach flames or sparks. Keep gasoline away from appliance
pilot lights, barbecues, electric appliances, power tools, etc.
Spilled fuel is not only a fire hazard, it causes environmental
damage. Wipe up spills immediately.
For information regarding oxygenated fuels, please refer to page
15
.
ENGINE OIL
Oil is a major factor affecting performance and service life. Use
4-stroke automotive detergent oil.
Recommended Oil
SAE Viscosity Grades
Use 4-stroke motor oil that
meets or exceeds the
requirements for API service
classification SJ, SL, or
equivalent. Always check the
API service label on the oil
container to be sure it includes
AMBIENT TEMPERATURE
the letters SJ, SL, or equivalent.
SAE 10W-30 is recommended for general use. Other viscosities
shown in the chart may be used when the average temperature in
your area is within the indicated range.
Running the engine with persistent spark knock or pinging can
cause engine damage.
Running the engine with persistent spark knock or pinging is
considered misuse, and the
Distributor’s Limited Warranty
does
not cover parts damaged by misuse.
1.
With the engine stopped and on a level surface, remove the fuel
filler cap and check the fuel level.
2.
Refill the tank if the fuel level is low. Do not fill above the upper
limit of the fuel tank. Wipe up spilled fuel before starting the
engine.
FUEL FILLER CAP
FILLER NECK
UPPER LIMIT
8
ENGLISH
Oil Level Check
Screw in the oil filler cap/dipstick securely.4.
Check the engine oil level with the engine stopped and in a level
position.
1.
Remove the oil filler cap/dipstick and wipe it clean.
Insert and remove the oil filler cap/dipstick without screwing it
2.
into the oil filler neck. Check the oil level shown on the dipstick.
If the oil level is near or below the lower limit mark on the
3.
dipstick, fill with the recommended oil (see page ) to the upper
8
limit mark. Do not overfill.
Screw in the filler cap/dipstick securely.
4.
OIL FILLER NECK
OIL FILLER CAP/
DIPSTICK
UPPER LIMIT
LOWER LIMIT
Running the engine with a low oil level can cause engine damage.
OIL FILLER CAP/DIPSTICK
SEALING
WASHER
OIL DRAIN
PLUG
UPPER
LIMIT
LOWER
LIMIT
The ‘‘Oil Alert
’’ buzzer (applicable types) will warn you when
engine oil needs to be added to the crankcase. If the buzzer sounds,
stop the engine and add oil.
Oil Change
Drain the used oil when the engine is warm. Warm oil drains
quickly and completely.
Place a suitable container below the engine to catch the used oil,
1.
then remove the oil filler cap/dipstick, oil drain plug and washer.
Allow the used oil to drain completely, then reinstall the oil drain
2.
plug and new washer, and tighten the oil drain plug securely.
Please dispose of used motor oil in a manner that is compatible
with the environment. We suggest you take used oil in a sealed
container to your local recycling center or service station for
reclamation. Do not throw it in the trash, pour it on the ground,
or down a drain.
With the engine in a level position, fill to the upper limit mark on
3.
the dipstick with the recommended oil (see page ).
8
Running the engine with a low oil level can cause engine
damage.
The ‘‘Oil Alert ’’ buzzer (applicable types) will warn you when
engine oil needs to be added to the crankcase. If the buzzer sounds,
stop the engine and add oil.
ENGLISH
9
AIR CLEANER
SPARK PLUG
A dirty air cleaner will restrict air flow to the carburetor, reducing
engine performance. If you operate the engine in very dusty areas,
clean the air filter more often than specified in the MAINTENANCE
SCHEDULE.
Operating the engine without an air filter, or with a damaged air
filter, will allow dirt to enter the engine, causing rapid engine wear.
This type of damage is not covered by the
Distributor’s Limited
Warranty.
Inspection
Remove the air cleaner cover and inspect the filter elements.
Clean or replace dirty filter elements. Always replace damaged
filter elements.
Cleaning
1.
Remove the wing nut from
the air cleaner cover, and
remove the cover.
2.
Remove the air filter
elements.
3.
Remove the foam air filter
WING NUT
AIR CLEANER
COVER
PAPER AIR
FILTER
ELEMENT
element from the paper air
filter element.
4.
Inspect both air filter
FOAM AIR
FILTER
ELEMENT
elements, and replace them if
they are damaged. Always
replace the paper air filter
element at the scheduled
interval (see page ).
7
AIR CLEANER
BASE
Recommended Spark Plugs:
BPR5ES (NGK)
W16EPR-U (DENSO)
The recommended spark plug is the correct heat range for normal
engine operating temperatures.
An incorrect spark plug can cause engine damage.
For good performance, the spark plug must be properly gapped
and free of deposits.
1.
Disconnect the spark plug cap,
SPARK PLUG CAP
SPARK PLUG WRENCH
and remove any dirt from
around the spark plug area.
2.
Remove the spark plug with a
13/16-inch spark plug wrench.
3.
Inspect the spark plug.
Replace it if damaged, badly
fouled, if the sealing washer
is in poor condition, or if the
electrode is worn.
4.
Measure the spark plug
electrode gap with a wire-
SIDE ELECTRODE
−
0.70 0.80 mm
−
(0.028 0.031 in)
type feeler gauge. Correct the
gap, if necessary, by carefully
bending the side electrode.
SEALING
WASHER
The gap should be:
0.70 0.80 mm (0.028 0.031 in)
−−
5.
Install the spark plug carefully,
by hand, to avoid crossthreading.
Clean the air filter elements if they are to be reused.
5.
Paper air filter element: Tap the filter element several times on a
hard surface to remove dirt, or blow compressed air [not
exceeding 207 kPa (2.1 kgf/cm
, 30 psi)] through the filter
element from the inside. Never try to brush off dirt; brushing will
force dirt into the fibers.
Foam air filter element: Clean in warm soapy water, rinse, and
allow to dry thoroughly. Or clean in nonflammable solvent and
allow to dry. Dip the filter element in clean engine oil, then
squeeze out all excess oil. The engine will smoke when started if
too much oil is left in the foam.
6.
Wipe dirt from the inside of the air cleaner base and cover, using
a moist rag. Be careful to prevent dirt from entering the air duct
that leads to the carburetor.
Place the foam air filter element over the paper element, and
7.
reinstall the assembled air filter.
Install the air cleaner cover, and tighten the wing nut securely.
8.
After the spark plug is seated, tighten with a 13/16-inch spark
6.
plug wrench to compress the sealing washer.
When installing a new spark plug, tighten 1/2 turn after the spark
7.
plug seats to compress the washer.
When reinstalling the original spark plug, tighten 1/8 1/4 turn
8.
−
after the spark plug seats to compress the washer.
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
9.
Attach the spark plug cap to the spark plug.
10
ENGLISH
SPARK ARRESTER (applicable types)
HELPFUL TIPS & SUGGESTIONS
The spark arrester may be standard or an optional part, depending
on the engine type. In some 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.
The spark arrester must be serviced every 100 hours to keep it
functioning as designed.
If the engine has been running, the muffler will be hot. Allow it to
cool before servicing the spark arrester.
Spark Arrester Removal
1.
Remove the three 5 mm screws from the muffler protector.
2.
Remove the 8 mm bolt and the two 8 mm nuts, and remove the
muffler protector, identification plate, muffler and gasket from
the cylinder.
3.
Remove the spark arrester from the muffler (take care not to
damage the wire mesh).
MUFFLER MUFFLER PROTECTOR
5 mm SCREW (3)
STORING YOUR ENGINE
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 impairing your engine’s function and
appearance, and will make the engine easier to start when you use
it again.
Cleaning
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
damaged paint, and coat other areas that may rust with a light film
of oil.
Using a garden hose or pressure washing equipment can force
water into the air cleaner or muffler opening. Water in the air
cleaner will soak the air filter, and water that passes through the
air filter or muffler can enter the cylinder, causing damage.
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 may need to have the carburetor, and other
fuel system components, serviced or replaced.
GASKET
SPARK ARRESTER
8mmBOLT
IDENTIFICATION PLATE
8 mm NUT (2)
Spark Arrester Cleaning & Inspection
1.
Use a brush to remove carbon
deposits from the spark arrester
screen. Be careful not to damage
the screen. Replace the spark
arrester if it has breaks or holes.
2.
Install the gasket, spark arrester, muffler, identification plate,
SPARK ARRESTER
SCREEN
and muffler protector in reverse order of removal.
The length of time that gasoline can be left in your fuel tank and
carburetor without causing functional problems will vary with
such factors as gasoline blend, your storage temperatures, and
whether the fuel tank is partially or completely filled. The air in a
partially filled fuel tank promotes fuel deterioration. Very warm
storage temperatures accelerate fuel deterioration. Fuel problems
may occur within a few months, or even less if the gasoline was
not fresh when you filled the fuel tank.
Fuel system damage or engine performance problems resulting
from neglected storage preparation are not covered under the
Distributor’s Limited Warranty
.
You can extend fuel storage life by adding a gasoline stabilizer
that is formulated for that purpose, or you can avoid fuel
deterioration problems by draining the fuel tank and carburetor.
ENGLISH
11
Adding a Gasoline Stabilizer to Extend Fuel Storage Life
Engine Oil
When adding a gasoline stabilizer, fill the fuel tank with fresh
gasoline. If only partially filled, air in the tank will promote 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 manufacturer’s instructions.
2.
After adding a gasoline stabilizer, run the engine outdoors for 10
minutes to be sure that treated gasoline has replaced the
untreated gasoline in the carburetor.
3.
Stop the engine, and move the fuel valve lever to the OFF
position.
FUEL VALVE LEVER
OFF
1.
Change the engine oil (see page ).
2.
Remove the spark plug (see page ).
3.
Pour a tablespoon 5 10 cm
−−
9
10
(5 10 cc) of clean engine oil into
the cylinder.
4.
Pull the starter rope several times to distribute the oil in the
cylinder.
5.
Reinstall the spark plug.
6.
Pull the starter rope slowly until resistance is felt.
(At this time the index mark on the cooling fan aligns with the
index mark on the fan cover).
This will close the valves so moisture cannot enter the engine
cylinder. Return the starter rope gently.
INDEX MARKS
COOLING FAN
Draining the Fuel Tank and Carburetor
Gasoline is highly flammable and explosive, and you
can be burned or seriously injured when handling
fuel.
Stop engine and keep heat, sparks, and flame away.
Handle fuel only outdoors.
Wipe up spills immediately.
1.
Place an approved gasoline container below the carburetor, and
use a funnel to avoid spilling fuel.
2.
Remove the drain bolt and gasket, and drain the carburetor bowl
fuel into an approved gasoline container.
3.
Move the fuel valve lever to the ON position. This will allow the
fuel tank to drain through the carburetor bowl.
FUEL VALVE LEVER
ON
GASKET
DRAIN BOLT
FAN COVER
Storage Precautions
If your engine will be stored with gasoline in the fuel tank and
carburetor, it is important to reduce the hazard of gasoline vapor
ignition. Select a well-ventilated storage area away from any
appliance that operates with a flame, such as a furnace, water
heater, or clothes dryer. Also avoid any area with a sparkproducing electric motor, or where power tools are operated.
If possible, avoid storage areas with high humidity, because that
promotes rust and corrosion.
Unless all fuel has been drained from the fuel tank, leave the fuel
valve lever in the OFF position to reduce the possibility of fuel
leakage.
Position the equipment so the engine is level. Tilting can cause
fuel or oil leakage.
With the engine and exhaust system cool, cover the engine to
keep out dust. A hot engine and exhaust system can ignite or melt
some materials. Do not use sheet plastic as a dust cover. A
nonporous cover will trap moisture around the engine, promoting
rust and corrosion.
If equipped with a battery for electric starter types, recharge the
battery once a month while the engine is in storage.
This will help to extend the service life of the battery.
CARBURETOR BOWL
4.
After draining the carburetor bowl and fuel tank, install the drain
bolt and gasket and tighten securely.
12
ENGLISH
Removal from Storage
Check your engine as described in the
CHECKS
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 time, causing hard starting.
If the cylinder was coated with oil during storage preparation, the
engine will smoke briefly at startup. This is normal.
TRANSPORTING
If the engine has been running, allow it to cool for at least 15
minutes before loading the engine-powered equipment on the
transport vehicle. A hot engine and exhaust system can burn you
and can ignite some materials.
Keep the engine level when transporting to reduce the possibility
of fuel leakage. Turn the fuel valve to the OFF position (see
page ).
section of this manual (see page ).
5
BEFORE OPERATION
3
TAKING CARE OF UNEXPECTED PROBLEMS
Possible Cause CorrectionENGINE WILL
NOT START
1.
Electric
starting
(applicable
types):
Check battery
and fuse.
2.
Check control
positions.
3.
Check engine
oil level.
4.
Check fuel.
5.
Remove and
inspect spark
plug.
6.
Take engine to
an authorized
Honda
servicing
dealer, or refer
to shop
manual.
Battery
discharged.
Fuse burnt out.
Fuel valve OFF.
Choke open.
Engine switch
OFF. (if
equipped)
Engine oil level
low (Oil Alert
types).
Out of fuel.
Bad fuel; engine
stored without
treating or
draining
gasoline, or
refueled with
bad gasoline.
Spark plug faulty,
fouled, or
improperly
gapped.
Spark plug wet
with fuel
(flooded engine).
Fuel filter
restricted,
carburetor
malfunction,
ignition
malfunction,
valves stuck, etc.
Recharge battery.
Replace fuse.
Move lever to ON
position.
Move control lever
to CHOKE position
unless the engine
is warm.
Turn engine switch
to ON position or
move the throttle
control away from
the OFF position.
Fill with the
recommended oil
to the proper level
(p. 9).
Refuel (p. 8).
Drain fuel tank and
carburetor (p.12 ).
Refuel with fresh
gasoline (p. 8 ).
Gap or replace
spark plug (p.10 ).
Dry and reinstall
spark plug. Start
engine with control
lever in MAX.
position.
Replace or repair
faulty components
as necessary.
ENGLISH
POWER
1.
Check air filter.
2.
Check fuel.
3.
Take engine to
an authorized
Honda
servicing
dealer, or refer
to shop
manual.
Possible CauseENGINE LACKS
Filter element(s)
restricted.
Bad fuel; engine
stored without
treating or
draining
gasoline, or
refueled with
bad gasoline.
Fuel filter
restricted,
carburetor
malfunction,
ignition
malfunction,
valves stuck, etc.
Correction
Clean or replace
filter element(s)
(p.10 ).
Drain fuel tank and
carburetor (p.10 ).
Refuel with fresh
gasoline (p. 8 ).
Replace or repair
faulty components
as necessary.
13
TECHNICAL & CONSUMER INFORMATION
Remote Control Linkage
TECHNICAL INFORMATION
Serial Number Location
Record the engine serial
number, type and purchase
date in the space below. You
will need this information when
ordering parts and when
making technical or warranty
inquiries.
ENGINE SERIAL NUMBER &
ENGINE TYPE LOCATION
Engine serial number: __ __ __ __ __ __ __ __ __ __ __
−
Engine type: ___ ___ ___ ___
Date Purchased: ______ / ______ / ______
Battery Connections for Electric Starter(applicable types)
Use a 12-volt battery with an ampere-hour rating of at least 18 Ah.
Be careful not to connect the battery in reverse polarity, as this will
short circuit the battery charging system. Always connect the
positive ( ) battery cable to the battery terminal before
connecting the negative ( ) battery cable, so your tools cannot
＋
−
cause a short circuit if they touch a grounded part while tightening
the positive ( ) battery cable end.
＋
A battery can explode if you do not follow the correct
procedure, seriously injuring anyone nearby.
Keep all sparks, open flames, and smoking materials
away from the battery.
1.
Connect the battery positive ( ) cable to the starter solenoid
＋
terminal as shown.
2.
Connect the battery negative ( ) cable to an engine mounting
−
bolt, frame bolt, or other good engine ground connection.
3.
Connect the battery positive ( ) cable to the battery positive ( )
＋＋
terminal as shown.
4.
Connect the battery negative ( ) cable to the battery negative
−
( ) terminal as shown.
5.
Coat the terminals and cable ends with grease.
NEGATIVE ( ) BATTERY CABLE POSITIVE ( ) BATTERY CABLE
−＋
−
The control is provided with a hole for cable attachment. Install a
solid wire cable as shown below. Do not use braided wire cable.
SOLID WIRE CABLE
CABLE CLAMP
×
5 16mm BOLT
CONTROL LEVER
SOLID WIRE CABLE
Carburetor Modifications for High Altitude Operation
At high altitude, the standard carburetor air-fuel mixture will be
too rich. Performance will decrease, and fuel consumption will
increase. A very rich mixture 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 time,
may increase emissions.
High altitude performance can be improved by specific
modifications to the carburetor. If you always operate your engine
at altitudes above 1,500 meters (5,000 feet), have your servicing
dealer perform this carburetor modification. This engine, when
operated at high altitude with the carburetor modifications for
high altitude use, will meet each emission standard throughout its
useful life.
Even with carburetor modification, engine horsepower will
decrease about 3.5% for each 300-meter (1,000-foot) increase in
altitude. The effect of altitude on horsepower will be greater than
this if no carburetor modification is made.
14
When the carburetor has been modified for high altitude operation,
the air-fuel mixture will be too lean for low altitude use. Operation
at altitudes below 1,500 meters (5,000 feet) with a modified
carburetor may cause the engine to overheat and result in serious
engine damage. For use at low altitudes, have your servicing
dealer return the carburetor to original factory specifications.
STARTER SOLENOID
ENGLISH
Oxygenated Fuels
Emission Control System Information
Some conventional gasolines are being blended with alcohol or an
ether compound. These gasolines are collectively referred to as
oxygenated fuels. To meet clean air standards, some areas of the
United States and Canada use oxygenated fuels to help reduce
emissions.
If you use oxygenated fuel, be sure it is unleaded and meets the
minimum octane rating requirements.
Before using an oxygenated fuel, try to confirm the fuel’s contents.
Some states/provinces require this information to be posted on
the pump.
The following are the EPA approved percentages of oxygenates:
ETHANOL
(ethyl or grain alcohol) 10% by volume
You may use gasoline containing up to 10%
ethanol by volume. Gasoline containing
ethanol may be marketed under the name
Gasohol.
MTBE
(methyl tertiary butyl ether) 15% by volume
You may use gasoline containing up to 15%
MTBE by volume.
METHANOL
(methyl or wood alcohol) 5% by volume
You may use gasoline containing up to 5%
methanol by volume as long as it also
contains cosolvents and corrosion inhibitors
to protect the fuel system. Gasoline
containing more than 5% methanol by
volume may cause starting and/or
performance problems. It may also damage
metal, rubber, and plastic parts of your fuel
system.
Source of Emissions
The combustion process produces carbon monoxide, oxides of
nitrogen, and hydrocarbons. Control of hydrocarbons and oxides
of nitrogen is very important because, under certain conditions,
they react to form photochemical smog when subjected to
sunlight. Carbon monoxide does not react in the same way, but it
is toxic.
Honda utilizes lean carburetor settings and other systems to
reduce the emissions of carbon monoxide, oxides of nitrogen, and
hydrocarbons.
The U.S., California Clean Air Acts and Environment Canada
EPA, California and Canadian regulations require all
manufacturers to furnish written instructions describing the
operation and maintenance of emission control systems.
The following instructions and procedures must be followed in
order to keep the emissions from your Honda engine within the
emission standards.
Tampering and Altering
Tampering with or altering the emission control system may
increase emissions beyond the legal limit. Among those acts that
constitute tampering are:
Removal or alteration of any part of the intake, fuel, or exhaust
systems.
Altering or defeating the governor linkage or speed-adjusting
mechanism to cause the engine to operate outside its design
parameters.
Problems That May Affect Emissions
If you are aware of any of the following symptoms, have your
engine inspected and repaired by your servicing dealer.
If you notice any undesirable operating symptoms, try another
service station or switch to another brand of gasoline.
Fuel system damage or performance problems resulting from the
use of an oxygenated fuel containing more than the percentages
of oxygenates mentioned above are not covered under the
Distributor’s Limited Warranty
.
Hard starting or stalling after starting.
Rough idle.
Misfiring or backfiring under load.
Afterburning (backfiring).
Black exhaust smoke or high fuel consumption.
Replacement Parts
The emission control systems on your Honda engine were
designed, built, and certified to conform with EPA, California and
Canadian emission regulations. We recommend the use of
genuine Honda parts whenever you have maintenance done.
These original-design replacement parts are manufactured to the
same standards as the original parts, so you can be confident of
their performance. The use of replacement parts that are not of the
original design and quality may impair the effectiveness of your
emission control system.
A manufacturer of an aftermarket part assumes the responsibility
that the part will not adversely affect emission performance. The
manufacturer or rebuilder of the part must certify that use of the
part will not result in a failure of the engine to comply with
emission regulations.
Maintenance
Follow the maintenance schedule on page . Remember that this
7
schedule is based on the assumption that your machine will be
used for its designed purpose. Sustained high-load or hightemperature operation, or use in unusually wet or dusty conditions,
will require more frequent service.
ENGLISH
15
SpecificationsAir Index
An Air Index Information hang tag/label is applied to engines
certified to an emission durability time period in accordance with
the requirements of the California Air Resources Board.
The bar graph is intended to provide you, our customer, the ability
to compare the emissions performance of available engines. The
lower the Air Index, the less pollution.
The durability description is intended to provide you with
information relating the engine’s emission durability period. The
descriptive term indicates the useful life period for the engine’s
emission control system. See your
Warranty
Descriptive Term
for additional information.
Applicable to Emissions Durability
Emission Control System
Period
Moderate
Intermediate
Extended
50 hours [0 65 cm
125 hours [greater than 65 cm
125 hours [0 65 cm
250 hours [greater than 65 cm
300 hours [0 65 cm
500 hours [greater than 65 cm
−−
(0 65 cc)]
(65 cc)]
−−
(0 65 cc)]
(65 cc)]
−−
(0 65 cc)]
(65 cc)]
The Air Index Information hang tag/label must remain on the
engine until it is sold. Remove the hang tag before operating the
engine.
GXV340
Length Width
××
Height
Dry weight
Engine type
Displacement
[Bore Stroke]
×
Max. output
Max. torque
Engine oil capacity
Fuel tank capacity
Fuel consumption
Cooling system
Ignition system
PTO shaft rotation
GXV390
Length Width
××
Height
Dry weight
Engine type
Displacement
[Bore Stroke]
×
Max. output
Max. torque
Engine oil capacity
Fuel tank capacity
Fuel consumption
Cooling system
Ignition system
PTO shaft rotation
××
433 382 406 mm
××
(17.015.016.0in)
31 kg (68 lbs)
4-stroke, overhead valve, single cylinder
338 cm
××
[8264mm(3.22.5in)]
(20.6 cu-in)
8.2 kW (11 PS, 11 bhp) at 3,600 rpm
24.0 N·m (2.45 kgf·m, 17.7 lbf·ft)
at 2,500 rpm
1.10
(1.16 US qt , 0.97 Imp qt)
2.3
(0.61 US gal , 0.51 Imp gal)
313 g/kWh (230 g/PSh, 0.51 lb/hph)
Forced air
Transistorized magneto
Counterclockwise
433 382 406 mm
××
(17.015.016.0in)
××
32 kg (71 lbs)
4-stroke, overhead valve, single cylinder
389 cm
××
[8864mm(3.52.5in)]
(23.7 cu-in)
9.7 kW (13 PS, 13 bhp) at 3,600 rpm
27.5 N·m (2.8 kgf·m, 20.3 lbf·ft) at
2,500 rpm
1.10
(1.16 US qt , 0.97 Imp qt)
2.3
(0.61 US gal , 0.51 Imp gal)
313 g/kWh (230 g/PSh, 0.51 lb/hph)
Forced air
Transistorized magneto
Counterclockwise
Tuneup Specifications
ITEM SPECIFICATION MAINTENANCE
Spark plug gap
Idle speed
Valve clearance
(cold)
Other
0.70 0.80 mm
−
(0.028 0.031 in)
−
1,400 150 rpm
±
IN: 0.15 0.02 mm
EX: 0.20 0.02 mm
±
±
No other adjustments needed.
Refer to page: 10
See your
authorized
Honda dealer
specifications
16
ENGLISH
Quick Reference Information
Unleaded gasoline (Refer to page 8)Fuel
U.S.
Except
U.S.
Engine oil
SAE 10W-30, API SJ or SL, for general use.
Refer to page 8.
Spark plug
BPR5ES (NGK)
W16EPR-U (DENSO)
Maintenance
Before each use:
Check engine oil level. Refer to page 9.
Check air filter. Refer to page 10.
First 20 hours:
Change engine oil. Refer to page 9.
Subsequent:
Refer to the maintenance schedule on page 7.
Wiring Diagrams
BASIC CIRCUIT
1A CHARGING SYSTEM
Pump octane rating 86 or higher
Research octane rating 91 or higher
Pump octane rating 86 or higher
3A CHARGING SYSTEM
10A CHARGING SYSTEM
OIL ALERT CIRCUIT
12V STARTER CIRCUIT
ENGINE STOP SWITCH
(1)
SPARK PLUG STARTER MOTOR
(2)
IGNITION COIL
(3)
TO ENGINE SWITCH
(4)
TO OIL ALERT CIRCUIT
(5)
TO ENGINE STOP SWITCH
(6)
OIL ALERT BUZZER
(7)
OIL LEVEL SWITCH
(8)
Bl
Bu
G
R
W
Black
Yellow
Y
Blue
Green
Red
White
Br
O
Lb
Lg
P
Gr
Brown
Orange
Light blue
Light green
Pink
Gray
BATTERY (12 V)
(9)
(10)
STARTER SOLENOID
(11)
CHARGING COIL
(12)
DIODE
(13)
TO LOAD
(14)
RECTIFIER
(15)
REGULATOR
(16)
ENGLISH
17
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