Honda GX270, GX340, GX240 Owner's Manual
Thank you for purchasing a Honda engine.
This manual covers the operation and maintenance of GX240 l GX340
engines and is based on GX240 engine. The QAE type is equipped for both
electric and manual starting; other types are equipped for manual starting
only. 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 engin,e if it is resold.
It is illegal in some areas to operate an engine without a U.S.D.A. qualified
spark arrester; check local laws and regulations. An optional spark arrester
for this engine is available from any dealership displaying the Honda Power
Equipment Engines sign.
Pay special attention to statements preceded by the following words:
ADANGER: Indicates severe personal injury or death will result if instructions are not follovved.
m Indicates a strong possibility of severe personal injury or death
if instructions are not followed.
CAUTION: Indicates a possibility of personal injury or equipment damage
if instructions are not followed.
NOTE: Gives helpful information.
If a problem should arise, or if you have any questions about your engine,
consult your Honda engine dealer.
Balm
vice if operated according to. instructions. Read and understand the
Owner’s Manual before operating the engine. Failure to do so could result
in personal injury or equipment damage.
Honda engines are designed to give safe and dependable ser-
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CONTENTS
CONTENTS
1. ENGINE SAFETY
2. COMPONENT IDENTIFICATION
3. BATTERY CONNECTIONS (QAE type)
.4. REMOTE CONTROL LINKAGE
PRE-OPERATION CHECK
5.
STARTING THE ENGINE
6.
OPERATION .......................................................................
7.
STOPPING THE ENGINE
8.
MAINTENANCE
9.
10. TRANSPORTING/STORAGE
11. TROUBLESHOOTING
SPECIFICATIONS ................................................................
12.
13. WIRING DIAGRAMS
WARRANTY SERVICE
14.
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5
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1. ENGINE SAFETY
b
Honda engines are designed to give safe and dependable service if oper-
ated according to instructions. Read and understand this Owner’s
Manual before operating the engine. Failure to do so could result in per-
sonal injury or equipment damage.
.
To prevent fire hazards and to provide adequate ventilation, keep the
engine at least 1 meter (3 feet) away from buildings and other equip-
ment during operation. Do not place flammable objects close to the
engine.
.
Children and pets must be kept away from the area of operation due to a
possibility of burns from hot engine components or injury from any
equipment the engine may be used to operate.
.
Know how to stop the engine quickly, and understand the operation of
all controls. Never permit anyone to operate the engine without proper
instructions.
.
Gasoline is extremely flammable and is explosive under certain
conditions.
l
Refuel in a well-ventilated area with the engine stopped. Do not smoke
or allow flames or sparks in the refueling area or where gasoline is
stored.
.
Do not overfill the fuel tank. After refueling, make sure the tank cap is
closed properly and securely.
.
Be careful not to spill fuel when refueling. Fuel vapor or spilled fuel may
ignite. If any fuel is spilled, make sure the area is dry before starting the
engine.
.
Never run the engine in an enclosed or confined area. Exhaust contains
poisonous carbon monoxide gas; exposure may cause loss of consciousness and may lead to death.
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The muffler becomes very hot during operation and remains hot for a
while after stopping the engine. Be careful not to touch the muffler while
it is hot. To avoid severe burns or fire hazards, let the engine cool before
transporting it or storing it indoors.
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Read these labels before you operate the engine.
GASOLINE WARNING LABEL
‘.
2. COMPONENT IDENTIFICATION
MUFFLER AIR CLEANER
SPARK PLUG
CHOKE LE
FUEL
FUEL Vn/LVE
FUEL FILLER CAP
ENGINE SWITCH
CIRCUIT BREAKER
THROTTLE LEVER
RECOIL STARTER
START:R GRIP
OIL FILLER CAP
ELECTRIC STARTER
(QAE type)
SERIAL NUMBER AN0
ENGINE TYPE
5
.
3. BATTERY CONNlfCTIONS (QAE type)
Use a 12 volt battery with an ampere-hour rating of at least 18 AH.
Connect the battery positive (+I cable to the starter solenoid terminal, as
shown.
Connect the battery negative (-1 cable to an engine mounting bolt, frame
bolt, or other good engine ground connection.
Check the battery cable connections to be sure the cables are tightened
and free of corrosion. Remove any corrosion and coat the terminals and
cable ends with grease.
NEGATIVE (4 STARTER SOLENOID
BATTERY CABLE
BATTERY CABLE
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The battery gives off explosive gases; keep sparks, flames and cigarettes away. Provide adequate ventilation when charging or using batteries
in an enclosed space.
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The battery contains sulfuric acid (electrolyte). Contact with skin or
eyes may cause severe burns. Wear protective clothing and a face
shield.
- If electrolyte gets on your skin, flush with water.
- If electrolyte gets in your eyes, flush with water for at least 15
minutes and call a physician immediately.
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Electrolyte is poisonous.
- If swallowed, drink large quantities of water or’milk and follow with
milk of magnesia or vegetable oil and call a physician.
. KEEP OUT OF REACH OF CHILDREN.
CAUTION:
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Use only distilled water in the battery. Tap water will shorten the service
life of the battery.
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Filling the battery above the UPPER LEVEL line may cause the electrolyte
to overflow, resultihg in corrosion to engine or nearby parts. Immediate-
ly wash off any spilled electrolyte.
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Be careful not to connect the battery in reverse polarity,.as this will short
circuit the battery charging system and trip the circuit breaker.
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4. REMOTE CONTROL LINKAGE
(for thrcjttle and choke cables)
The throttle and choke control levers are provided with holes for optional
cable attachment. The following illustrations show installation examples
for a solid wire cable and for a braided wire cable. If using a braided wire
cable, add a return spring as shown.
It is necessary to loosen the throttle lever friction nut when operating the
throttle with a remote cable.
RETURN
SPRING
THROTTLE LEV
FRICTION NUT
BRAIDED
1 WIRE CABLE
WIRE CABLE
4 mm SCREW
WIRE HOLDER
5. PRE-OPERATION CHECK
1. ENGINE OIL
\
CAUTION:
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Engine oil is a major factor affecting engine performance and service life.
Nondetergent oils and 2 stroke engine oils are not recommended
because they have inadequate lubricating characteristics.
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Be sure to check the engine on a level surface with the engine stopped.
Use Honda 4-stroke oil, or an equivalent high-detergent, premiumquality motor oil certified to meet or
exceed U.S. automobile manufacturer’s requirements for Service Classification SE or SF. (Motor oils classified SE or SF will show this designation on the container.)
SAE low-40 is recommended for
general, all-temperature use.
Other viscosities shown in the chart
may be used when the average
L 1 1
-30 -20
-10 0 10 20 30
Ambient temperature
4
40°C
temperature in your area is within the
indicated range.
1. Remove the oil filler cap and wipe the dipstick clean.
2. Insert the dipstick into the oil filler neck, but do not screw it in.
3. If the level is low, fill to the top of the oil filler neck with the recommended oil.
NOTE: The oil Alert System will automatically stop the engine before the
oil level falls below the safe limit. However, to avoid the inconvenience of
an unexpected shutdown, it is advisable to visually inspect the oil level
regularly.
UPPER OIL LEVEL
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2. REDUCTION GEAR OIL
(GX240 only)
<l/2 reduction with automatic centrifugal clutch>
1. Remove the oil filler cap and wipe the dipstick clean.
2. Insert the dipstick into the filler neck, but do not screw it in.
3. If the level is low, fill to the upper level mark with the same oil that is
recommended for the engine (see engine oil recommendations on page
8).
Oil capacity: 0.3 I (0.32 US qt 0.53 Imp pt)
DIPSTICK
UPPEd LEVEL
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3. AIR CLEANER
CAUTION: Never run the engine without the air cleaner. Rapid engine
wear will result from contaminants, such as dust and dirt, being drawn
through the carburetor and into the engine.
<Dual element type>
#
Check the air cleaner elements to be
sure they are clean and in good condition. Clean or replace the elements
if necessary (p.22).
ELEMENTS
(Silent type only)
<Cyclone type>
Check the air cleaner element to
1.
be sure they are clean and in good
condition.
Clean or replace the elements if
necessary (p.23).
Check the cyclone housing, and
2.
clean it if it is clogged or excessively dirty (p.23).
ELEMENTS
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CYCLONE HOUSING
<Single element type>
Check the air cleaner element to be
sure it is clean and in good condition.
Clean or replace the element if nec-
essary (p.24).
ELEMENT
<Oil bath type>
1. Check the air cleaner element to
be sure it is clean and in good condition. Clean or replace the element if necessary (p.24).
2. Check oil level and condition.
ELEMENT
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4. FUEL
Your engine is designed to use any gasoline that has a pump octane
number ( R ‘2 M ) of 86 or higher, or that has a research oc-
tane number of 91 or higher. Gasoline pumps at service station normally
display the pump octane number.
We recommend that you use unleaded fuel because it produces fewer
engine and spark plug deposits and extends the life of exhaust system
components.
Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid
getting dirt, dust or water in the fuel tank. Use of a lower octane gasoline
can cause persistent “pinging” or heavy “spark knock” (a metallic rapping
noise) which, if severe, can lead to engine damage.
CAUTION:
under normal load, change brands of gasoline. If spark knock or pinging
persists, consult your authorized Honda dealer. Failure to do so is considered misuse, and damage caused by misuse is not covered by Honda’s
Limited Warranty.
If “spark knock” or “pinging” occurs at a steady engine speed
Occasionally you may experience light spark knock while operating under
heavy loads. This is no cause for concern, it simply means your engine is
operating efficiently.
Gasoline is extremely flammable and is explosive under certain
conditions.
Refuel in a well-ventilated area with the engine stopped. Do not smoke
or allow flames or sparks in the area where the engine is refueled or
where gasoline is stored.
Do not overfill the fuel tank (there should be no fuel in the filler neck).
After refueling, make sure the tank cap is closed properly and securely.
Be careful not to.spill fuel when refueling. Spilled fuel or fuel vapor may
ignite. If any fuel is spilled, make sure the area is dry before starting the
engine.
Avoid repeated or prolonged contact. with skin or breathing of vapor.
KEEP OUT OF REACH OF CHILDREN.
Fuel tank capacity: GX240 6.0 P (1’.6 US Gal, 10.6 Imp pt)
GX340 6.5 0 (1.7 US Gal, 11.4 Imp pt)
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