The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
Keep this owner’s manual handy, so you can refer to it at any time.
This owner’s manual is considered a permanent part of the engine and
should remain with the engine if resold.
The information and specifications included in this publication were in
effect at the time of approval for printing. Illustrations are based on the
GCV530-QEA3 type. Honda Motor Co., Ltd. reserves the right, however,
to discontinue or change specifications or design at any time without
notice and without incurring any obligation whatever. No part of this
publication may be reproduced without written permission.
INTRODUCTION
Congratulations on your selection of a Honda engine. We are certain
you will be pleased with your purchase of one of the finest engines on
the market.
We want to help you get the best results from your new engine and to
operate it safely. This manual contains the information on how to do
that; please read it carefully.
As you read this manual, you will find information preceded by a
symbol. That information is intended to help you avoid
damage to your engine, other property, or the environment.
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.
When your engine needs scheduled maintenance, keep in mind that
your Honda servicing dealer is specially trained in servicing Honda
engines. Your Honda servicing dealer is dedicated to your satisfaction
and will be pleased to answer your questions and concerns.
Best Wishes,
Honda Motor Co., Ltd.
1
INTRODUCTION
A FEW WORDS ABOUT SAFETY
Your safety and the safety of others are very important. And using this
engine safely is an important responsibility.
To help you make informed decisions about safety, we have provided
operating procedures and other information on labels and in this
manual. This information alerts you to potential hazards that could
hurt you or others.
Of course, it is not practical or possible to warn you about all the
hazards associated with operating or maintaining an engine. You must
use your own good judgment.
You will find important safety information in a variety of forms,
including:
Safety Messages –– preceded by a safety alert symbol
of three signal words, DANGER, WARNING, or CAUTION.
and one
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.
Safety Headings –– such as IMPORTANT SAFETY INFORMATION.
Safety Section –– such as ENGINE SAFETY.
Instructions –– how to use this engine correctly and safely.
This entire book is filled with important safety information –– please
read it carefully.
2
CONTENTS
ENGINE SAFETY ........................................................................................ 5
IMPORTANT SAFETY INFORMATION ................................................. 5
CONTROLS & FEATURES ......................................................................... 7
COMPONENT & CONTROL LOCATIONS ............................................. 7
CONTROLS ............................................................................................. 9
Throttle Lever ..................................................................................... 9
Recoil Starter (applicable engine types) .......................................... 9
FEATURES ............................................................................................ 10
Fuel-cut Solenoid ............................................................................. 10
BEFORE OPERATION .............................................................................. 11
IS YOUR ENGINE READY TO GO? ...................................................... 11
Check the General Condition of the Engine ................................... 11
Check the Engine .............................................................................. 12
Check the Equipment Powered by This Engine ............................. 12
OPERATION ............................................................................................. 13
SAFE OPERATING PRECAUTIONS .................................................... 13
STARTING THE ENGINE ..................................................................... 13
STOPPING THE ENGINE ..................................................................... 16
SETTING ENGINE SPEED .................................................................... 17
SERVICING YOUR ENGINE ..................................................................... 18
THE IMPORTANCE OF MAINTENANCE ............................................. 18
MAINTENANCE SAFETY ..................................................................... 19
MAINTENANCE SCHEDULE ............................................................... 20
FUEL RECOMMENDATIONS .............................................................. 21
ENGINE OIL LEVEL CHECK ................................................................. 22
ENGINE OIL CHANGE .......................................................................... 23
OIL FILTER CHANGE ............................................................................ 24
ENGINE OIL RECOMMENDATIONS ................................................... 26
AIR FILTER INSPECTION ..................................................................... 27
AIR CLEANER SERVICE ....................................................................... 28
FUEL FILTER INSPECTION .................................................................. 30
SPARK PLUG SERVICE ........................................................................ 31
SPARK ARRESTER SERVICE (optional equipment) .......................... 33
3
CONTENTS
HELPFUL TIPS & SUGGESTIONS .......................................................... 35
STORING YOUR ENGINE .................................................................... 35
Storage Preparation ......................................................................... 35
Storage Precautions ......................................................................... 38
Removal From Storage .................................................................... 39
TRANSPORTING .................................................................................. 40
TAKING CARE OF UNEXPECTED PROBLEMS ...................................... 41
ENGINE WILL NOT START .................................................................. 41
ENGINE LACKS POWER ...................................................................... 41
TECHNICAL & CONSUMER INFORMATION ......................................... 42
TECHNICAL INFORMATION ................................................................ 42
Serial Number Location ................................................................... 42
Battery Connections for Electric Starter ......................................... 43
Remote Control Linkage .................................................................. 44
Carburetor Modification for High Altitude Operation ................... 45
Oxygenated Fuels ............................................................................ 46
Emission Control System Information ........................................... 47
Air Index ............................................................................................ 49
Specifications ................................................................................... 50
Wiring Diagrams .............................................................................. 52
CONSUMER INFORMATION ............................................................... 55
Honda Publications .......................................................................... 55
Customer Service Information ........................................................ 56
QUICK REFERENCE INFORMATION ............................. Inside back cover
4
ENGINE SAFETY
IMPORTANT SAFETY INFORMATION
Most accidents with engines can be prevented if you follow all
instructions in this manual and on the engine. Some of the most
common hazards are discussed below, along with the best way to
protect yourself and others.
Owner Responsibilities
Honda engines are designed to give safe and dependable service if
operated according to instructions. Read and understand this
owner’s manual before operating the engine. Failure to do so could
result in personal injury or equipment damage.
Know how to stop the engine quickly, and understand the operation
of all controls. Never permit anyone to operate the engine without
proper instructions.
Do not allow children to operate the engine. Keep children and pets
away from the area of operation.
Refuel With Care
Gasoline is extremely flammable, and gasoline vapor can explode.
Refuel outdoors, in a well-ventilated area, with the engine stopped.
Never smoke near gasoline, and keep other flames and sparks away.
Always store gasoline in an approved container. If any fuel is spilled,
make sure the area is dry before starting the engine.
Hot Exhaust
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. Let the engine cool before storing it indoors.
To prevent fire hazards and to provide adequate ventilation for
stationary equipment applications, keep the engine at least 3 feet (1
meter) away from building walls and other equipment during
operation. Do not place flammable objects close to the engine.
5
ENGINE SAFETY
Carbon Monoxide Hazard
Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of
exhaust gas. Never run the engine in a closed garage or confined area.
Other Equipment
Review the instructions provided with the equipment powered by this
engine for any additional safety precautions that should be observed
in conjunction with engine startup, shutdown, operation, or protective
apparel that may be needed to operate the equipment.
6
CONTROLS & FEATURES
COMPONENT & CONTROL LOCATIONS
RECOIL STARTER
(applicable engine types)
AIR CLEANER
SPARK PLUGS
ELECTRIC STARTER
7
CONTROLS & FEATURES
OIL FILLER CAP/
DIPSTICK
SCREEN GRID
FUEL PUMP
OIL PRESSURE SWITCH
(applicable engine types)
FUEL FILTER
OIL FILTER
OIL DRAIN BOLT
8
CONTROLS & FEATURES
CONTROLS
Throttle Lever
The throttle lever controls engine speed.
Moving the throttle lever in the directions shown makes the engine
run faster or slower.
Set the lever to CHOKE when the engine is cold.
Some engine applications use a remotely-mounted throttle control
rather than the engine-mounted throttle lever shown here. Refer to the
instructions provided with the equipment powered by this engine for
remote control information.
CHOKE
FAST
SLOW
THROTTLE LEVER
Recoil Starter (applicable engine types)
Pulling the starter grip operates the recoil starter to crank the engine.
STARTER GRIP
9
CONTROLS & FEATURES
FEATURES
Fuel-cut Solenoid
The engine is equipped with a fuel-cut solenoid that allows fuel to flow
to the carburetor main jet when the engine switch is in the ON or
START position and stops the flow of fuel to the main jet when the
engine switch is in the OFF position.
The engine must be connected to the battery to energize the fuel-cut
solenoid, allowing the engine to run. If the battery is disconnected,
fuel flow to the carburetor main jet will stop.
Oil Pressure Switch (applicable engine types)
The engine is equipped with a oil pressure switch to prevent damage
from lack of lubrication or overheating.
If oil pressure alarm lamp comes on, check the engine oil level, and
add the correct engine oil if necessary (see page 22 ).
To restart the engine, turn the engine switch to the OFF position.
Next, start according to the starting procedure.
If the oil pressure alarm lamp continues to light even through the
engine oil level is correct, stop operating the engine and see an
authorized Honda servicing dealers.
10
BEFORE OPERATION
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 failing to correct a problem
before operation, could cause a
malfunction in which you could be
seriously injured.
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.
Check the General Condition of the Engine
Look around and underneath the engine for signs of oil or gasoline
leaks.
Remove any excessive dirt or debris, especially around the muffler
and recoil starter.
Look for signs of damage.
Check that all shields and covers are in place, and all nuts, bolts, and
screws are tightened.
11
BEFORE OPERATION
Check the Engine
Check the engine oil level (see page 22). Running the engine with a
low oil level can cause engine damage.
Check the air filter (see page 27). A dirty air filter will restrict air flow
to the carburetor, reducing engine performance.
Check the fuel level. Starting with a full tank will help to eliminate or
reduce operating interruptions for refueling.
Check the Equipment Powered by This Engine
Review the instructions provided with the equipment powered by this
engine for any precautions and procedures that should be followed
before engine startup.
12
OPERATION
SAFE OPERATING PRECAUTIONS
Before operating the engine for the first time, please review the
IMPORTANT SAFETY INFORMATION on page 5 and the chapter titled
BEFORE OPERATION.
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 in
conjunction with engine startup, shutdown, or operation.
Always keep hands and feet clear of rotating machinery.
STARTING THE ENGINE
1. If the fuel tank is equipped with a valve, be sure the fuel valve is in
the OPEN or ON position before attempting to start the engine.
13
OPERATION
2. To start a cold engine, move the throttle lever to the CHOKE position.
To restart a warm engine, leave the throttle lever in the SLOW
position.
Some engine applications use a remotely-mounted throttle control
rather than the engine-mounted throttle lever shown here. Refer to
the instructions provided with the equipment powered by this
engine for remote control information.
THROTTLE LEVER
CHOKE
SLOW
3. Turn the engine switch to the ON position.
4. Operate the starter.
RECOIL STARTER (applicable engine types):
Pull the starter grip lightly until you feel resistance, then pull briskly.
Return the starter grip gently.
STARTER GRIP
14
OPERATION
ELECTRIC STARTER (applicable engine types):
Turn the key to the START position, and hold it there until the engine
starts.
If the engine fails to start within 5 seconds, release the 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 key, allowing it to return to the
ON position.
5. If the throttle lever has been moved to the CHOKE position to start
the engine, gradually move it to the SLOW position as the engine
warms up.
CHOKE
SLOW
THROTTLE LEVER
15
OPERATION
STOPPING THE ENGINE
To stop the engine in an emergency, simply turn the engine switch to
the OFF position. Under normal conditions, use the following
procedure.
1. Move the throttle lever to the SLOW position.
Some engine applications use a remotely-mounted throttle control
rather than the engine-mounted throttle lever shown here. Refer to
the instructions provided with the equipment powered by this
engine for remote control information.
SLOW
THROTTLE LEVER
2. Turn the engine switch to the OFF position.
3. If the fuel tank is equipped with a valve, turn the fuel valve to the
CLOSED or OFF position.
16
OPERATION
SETTING ENGINE SPEED
Position the throttle lever for the desired engine speed.
Some engine applications use a remotely-mounted throttle control
rather than the engine-mounted throttle lever shown here.
For engine speed recommendations, refer to the instructions provided
with the equipment powered by this engine.
THROTTLE LEVER
FAST
SLOW
Do not disconnect the battery from the engine while the engine is
running. Disconnecting the battery causes the fuel-cut solenoid to shut
off the flow of fuel to the carburetor main jet, and the engine will stop.
17
SERVICING YOUR ENGINE
THE IMPORTANCE OF MAINTENANCE
Good maintenance is essential for safe, economical, and trouble-free
operation. It will also help reduce air pollution.
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 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 unusual 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 emission control devices and
systems may be done by any engine repair establishment or
individual, using parts that are ‘‘certified’’ to EPA standards.
18
SERVICING YOUR ENGINE
MAINTENANCE SAFETY
Some of the most important safety precautions are as follows:
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.
Failure to properly follow
maintenance instructions and
precautions can cause you to be
seriously hurt or killed.
Always follow the procedures and
precautions in the 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 your 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.
19
SERVICING YOUR ENGINE
MAINTENANCE SCHEDULE
REGULAR SERVICE PERIOD (3)
ITEM
First
Every
Every
Every
year
or
Refer
to
page
Each month 3 months 6 months
Perform at every indicated
month or operating hour interval,
whichever comes first.
use
or
or
or
20 Hrs. 50 Hrs. 100 Hrs. 200 Hrs.
Engine oil
Check level
Change
Replace
○
22
23
24
○
○
○
Oil filter
(optional part)
Air filter
Check
Clean
Replace
Check-adjust
Replace
Clean
○
27
28
○ (1)
＊
○
Spark plug
○
○
31
33
○
Spark arrester
(optional part)
Cooling system
Clean
○
－
－
－
－
－
－
Combustion chamber Clean
After every 300 Hrs (2)
Idle speed
Valve clearance
Fuel filter
Check-adjust
○ (2)
○ (2)
○ (2)
Check-adjust
Check-replace
Check
Fuel line
Every 2 years (Replace if necessary) (2)
Emission-related items.
＊Replace the paper element type only.
(1) Service more frequently when used in dusty areas.
(2) These items should be serviced by your servicing dealer, 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.
20
SERVICING YOUR ENGINE
FUEL RECOMMENDATIONS
Use unleaded gasoline with a pump octane rating of 86 or higher.
These engines are certified to operate on unleaded gasoline. Unleaded
gasoline produces fewer engine and spark plug deposits and extends
exhaust system life.
Never use stale or contaminated gasoline or an 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.
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.
21
SERVICING YOUR ENGINE
ENGINE OIL LEVEL CHECK
Check the engine oil level with the engine stopped and in a level
position.
1. Place the engine on a level surface.
2. Remove the oil filler cap/dipstick and wipe it clean.
3. Insert and remove the dipstick without screwing it into the oil filler
neck. Check the oil level shown on the dipstick.
4. If the oil level is near or below the lower limit mark on the dipstick,
fill with the recommended oil to the upper limit mark (see page 26).
5. Reinstall the oil filler cap/dipstick.
OIL FILLER CAP/ DIPSTICK
OIL FILLER CAP/
DIPSTICK
UPPER LIMIT
LOWER LIMIT
Running the engine with a low oil level can cause engine damage,
which is not by the Distributor’s Limited Warranty.
22
SERVICING YOUR ENGINE
ENGINE OIL CHANGE
Drain the used oil while the engine is warm. Warm oil drains quickly
and completely.
1.Place a suitable container below the engine to catch the used oil,
then remove the oil filler cap/dipstick and the drain bolt.
2.Allow the used oil to drain completely, then reinstall the drain bolt,
and tighten it 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.
3.With the engine in a level position, fill to the upper limit mark on the
dipstick with the recommended oil (see page 26).
ENGINE OIL REFILL CAPACITIES:
Without oil filter replacement: 0.95 US qt (0.90 )
With oil filter replacement:
1.11 US qt (1.05 )
Running the engine with a low oil level can cause engine damage.
4.Reinstall the oil filler cap/dipstick securely.
UPPER LIMIT
LOWER LIMIT
OIL DRAIN BOLT
OIL FILLER CAP/DIPSTICK
23
SERVICING YOUR ENGINE
OIL FILTER CHANGE
1. Drain the engine oil, and retighten the drain bolt securely (see page
23).
2. Remove the oil filter with oil filter wrench, and drain the remaining
oil into a suitable container. Discard the used oil filter.
Use an oil filter wrench, rather than a strap wrench, to avoid striking
and damaging the oil filter.
FILTER MOUNTING BASE
OIL FILTER
OIL FILTER WRENCH
SEAL
3. Clean the filter mounting base, and coat the seal of the new oil filter
with clean engine oil.
Use only a genuine Honda oil filter or a filter of equivalent quality
specified for your model. Using the wrong filter, or a non-Honda
filter which is not of equivalent quality, may cause engine damage.
24
SERVICING YOUR ENGINE
4. Screw on the new oil filter by hand until the seal contacts the filter
mounting base, then use an oil filter wrench to tighten the filter an
additional 7/8 turn.
Oil filter tightening torque: 9 lbf·ft (12 N·m , 1.2 kgf·m).
5. Refill the crankcase with the specified amount of the recommended
oil (see page 26). Reinstall the oil filler cap/dipstick.
6. Start the engine, and check for leaks.
7. Stop the engine, and check the oil level as described on page 22. If
necessary, add oil to bring the oil level to the upper limit mark on the
dipstick.
25
SERVICING YOUR ENGINE
ENGINE OIL RECOMMENDATIONS
Oil is a major factor affecting performance and service life. Use
4-stroke automotive detergent oil.
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 recommended range.
SAE Viscosity Grades
SAE
TEMP
The SAE oil viscosity and service classification are in the API label on
the oil container. Honda recommends that you use API SERVICE
category SJ oil.
26
SERVICING YOUR ENGINE
AIR FILTER INSPECTION
Remove the air cleaner cover and inspect the filter elements. Clean or
replace dirty filter elements. Always replace damaged filter elements.
Refer to page 28 for instructions that apply to the air cleaner and filter
service.
AIR CLEANER COVER BOLTS
AIR CLEANER COVER
FOAM FILTER ELEMENT
GRID
PAPER FILTER ELEMENT
AIR CLEANER BASE
AIR DUCT
27
SERVICING YOUR ENGINE
AIR CLEANER SERVICE
A dirty air filter 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.
(see page 20).
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.
1. Remove the two air cleaner cover bolts from the air cleaner cover,
and remove the cover.
2. Remove the foam filter element.
3. Remove the paper filter element from the grid.
AIR CLEANER COVER BOLTS
AIR CLEANER COVER
FOAM FILTER ELEMENT
GRID
PAPER FILTER ELEMENT
AIR CLEANER BASE
AIR DUCT
4. Inspect both air filter elements, and replace them if they are
damaged. Always replace the paper filter element at the scheduled
interval (see page 20).
28
SERVICING YOUR ENGINE
5. Clean the air filter elements if they are to be reused.
Paper filter element: Tap the filter element several times on a hard
surface to remove dirt, or blow compressed air [not exceeding 30 psi
(207 kPa, 2.1 kgf/cm )] through the filter element from the clean side
that faces the engine. Never try to brush off dirt; brushing will force
dirt into the fibers. Replace the paper filter element if it is excessively
dirty.
Foam 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 on the carburetor.
7. Place the foam filter element into the air cleaner cover.
8. Install the grid over the paper filter element then install the
assembly into the air cleaner base. The grid must be placed between
the foam element and the paper element to prevent oil from
transferring to the paper element.
9. Install the cover and tighten the two air cleaner cover bolts securely.
Excess oil will restrict air flow through the foam filter element and may
transfer to the paper filter element, soaking and clogging it.
SQUEEZE THOROUGHLY
PAPER ELEMENT
DRY
ENGINE OIL
SOLVENT
29
SERVICING YOUR ENGINE
FUEL FILTER INSPECTION
Check the fuel filter for water accumulation or sediment.
If the fuel filter is found with excessive water accumulation or
sediment, take the engine to your authorized Honda servicing dealer.
FUEL FILTER
30
SERVICING YOUR ENGINE
SPARK PLUG SERVICE
Recommended spark plugs:BPR5ES (NGK)
W16EPR-U (DENSO)
Incorrect spark plugs can cause engine damage.
1. Disconnect the spark plug caps, and remove any dirt from around
the spark plug area.
2. Remove the spark plugs with a 13/16-inch spark plug wrench.
SPARK PLUG WRENCH
3. Inspect the spark plugs. Replace
them if the electrodes are worn,
or if the insulator is cracked or
chipped. Clean the spark plugs
with a wire brush if you are going
0.028－0.031 in
(0.70－0.80 mm)
to reuse them.
4. Measure the spark plug electrode
gap with a suitable gauge. The
gap should be 0.028－0.031 in
(0.70－0.80 mm). Correct the gap,
if necessary, by carefully bending
the side electrode.
5. Install the spark plug carefully, by
hand, to avoid cross-threading.
31
SERVICING YOUR ENGINE
6. After the spark plug seats, tighten with a 13/16-inch spark plug
wrench to compress the washer.
If reinstalling the used spark plugs, tighten 1/8－1/4 turn after the
spark plug seats.
If installing a new spark plugs, tighten 1/2 turn after the spark plug
seats.
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
7. Attach the spark plug caps.
32
SERVICING YOUR ENGINE
SPARK ARRESTER SERVICE (optional equipment)
Your engine is not factory-equipped with a spark arrester. 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 very hot. Allow the
muffler to cool before servicing the spark arrester.
1. Remove the 6 mm flange bolts from the muffler protector, and
remove the muffler protector.
2. Remove the special screws from the spark arrester and remove the
spark arrester from the muffler.
MUFFLER
SPARK ARRESTER
6 mm
FLANGE BOLT
SPECIAL SCREWS
6 mm
FLANGE BOLTS
MUFFLER
PROTECTOR
33
SERVICING YOUR ENGINE
3. Use a brush to remove carbon deposits from the spark arrester
screen. Be careful to avoid damaging the screen.
The spark arrester must be free of breaks and holes. Replace the
spark arrester if it is damaged.
SPARK ARRESTER SCREEN
4. Install the spark arrester, and muffler protector in the reverse order
of disassembly.
34
HELPFUL TIPS & SUGGESTIONS
STORING YOUR ENGINE
Storage Preparation
Proper storage preparation is essential for keeping your engine
troublefree 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 after storage.
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.
Water contacting a hot engine can cause damage. If the engine has
been running, allow it to cool for at least half an hour before
washing.
Fuel
Gasoline will oxidize and deteriorate in storage. Old 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.
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 deterioration problems may occur
within a few months, or even less if the gasoline was not fresh when
you filled the fuel tank.
35
HELPFUL TIPS & SUGGESTIONS
The Distributor’s Limited Warranty does not cover fuel system
damage or engine performance problems resulting from neglected
storage preparation.
You can extend fuel storage life by adding a fuel stabilizer that is
formulated for that purpose, or you can avoid fuel deterioration
problems by draining the fuel tank and carburetor.
ADDING A FUEL STABILIZER TO EXTEND FUEL STORAGE LIFE
When adding a fuel 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 fuel stabilizer following the manufacturer’s instructions.
2. After adding a fuel 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 if the fuel tank is equipped with a fuel valve,
move the fuel valve to the CLOSED or OFF position.
36
HELPFUL TIPS & SUGGESTIONS
DRAINING THE FUEL TANK AND CARBURETOR
1. Disconnect the fuel line to the engine, and drain the fuel tank into an
approved gasoline container. If the fuel tank is equipped with a valve,
turn the fuel valve to the OPEN or ON position to enable draining.
After draining is completed, reconnect the fuel line.
2. Loosen the carburetor drain screw, and drain the carburetor into an
approved gasoline container. After draining is completed, tighten
the carburetor drain screw.
Gasoline is highly flammable and
explosive.
You can be burned or seriously
injured when handling fuel.
Keep heat, sparks and flame away.
Handle fuel only outdoors.
Wipe up spills immediately.
CARBURETOR
DRAIN SCREW
37
HELPFUL TIPS & SUGGESTIONS
Engine Oil
1. Change the engine oil (see page 23).
Engine Cylinder
1. Remove the spark plugs (see page 31).
2. Pour a tablespoon (5－10 cc) of clean engine oil into the cylinders.
3. Pull the starter rope several times to distribute the oil in the
cylinders.
4. Reinstall the spark plugs.
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 spark-producing 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
in the CLOSED or OFF position to reduce the possibility of fuel leakage.
38
HELPFUL TIPS & SUGGESTIONS
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.
Remove the battery and store it in a cool, dry place. Recharge the
battery once a month while the engine is in storage. This will help to
extend the service life of the battery.
Removal From Storage
Check your engine as described in the BEFORE OPERATION chapter of
this manual.
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 that it contains only fresh gasoline. Gasoline oxidizes and
deteriorates over time, causing hard starting.
If the cylinders were coated with oil during storage preparation, the
engine may smoke briefly at startup. This is normal.
39
HELPFUL TIPS & SUGGESTIONS
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. If the fuel tank is equipped with a fuel valve, move the
fuel valve lever to OFF.
40
TAKING CARE OF UNEXPECTED PROBLEMS
ENGINE WILL NOT
START
Possible Cause
Correction
1. Check battery and
fuse.
Battery discharged.
Fuse burnt out.
(if equipped)
Recharge battery.
Replace fuse.
2. Check control
positions.
Fuel valve OFF.
(if equipped)
Move lever to ON.
Choke OPEN.
Move lever to CLOSED/
CHOKE
unless engine is warm.
Turn engine switch to
ON.
Engine switch OFF.
(if equipped)
3. Check fuel.
Out of fuel.
Refuel.
Bad fuel; engine stored
without treating or
draining gasoline, or
refueled with bad
gasoline.
Drain fuel tank and
carburetor (p. 37).
Refuel with fresh
gasoline.
4. Remove and inspect
spark plug.
Spark plugs faulty,
fouled, or improperly
gapped.
Clean, gap, or replace
spark plugs (p. 31).
Spark plugs wet with
fuel (flooded engine).
Dry and reinstall spark
plugs. Start engine
with throttle lever in
FAST position.
5. Take engine to an
authorized Honda
Fuel filter clogged,
carburetor malfunction,
ignition malfunction,
valves stuck, etc.
Replace or repair faulty
components as
necessary.
servicing dealer, or
refer to shop manual.
ENGINE LACKS
POWER
Possible Cause
Correction
1. Check air filter.
Filter element(s)
clogged.
Bad fuel; engine stored
without treating or
draining gasoline, or
refueled with bad gasoline.
Fuel filter clogged,
carburetor malfunction,
ignition malfunction,
valves stuck, etc.
Clean or replace filter
element(s) (p. 28).
Drain fuel tank and
carburetor (p. 37).
Refuel with fresh
gasoline.
Replace or repair faulty
components as
necessary.
2. Check fuel.
3. Take engine to an
authorized Honda
servicing dealer, or
refer to shop manual.
41
TECHNICAL & CONSUMER INFORMATION
TECHNICAL INFORMATION
Serial Number Location
ENGINE SERIAL NUMBER
Record the engine serial number in the space below. You will need this
serial number when ordering parts, and when making technical or
warranty inquires (see page56 ).
Engine serial number:
42
TECHNICAL & CONSUMER INFORMATION
Battery Connections for Electric Starter
Use a 12-volt battery with an ampere-hour rating of at least 45 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 dielectric grease.
POSITIVE (＋)
BATTERY CABLE
STARTER SOLENOID
NEGATIVE (－)
BATTERY CABLE
43
TECHNICAL & CONSUMER INFORMATION
Remote Control Linkage
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. Do not use a braided wire cable.
REMOTE THROTTLE AND REMOTE CHOKE
CHOKE RETURN SPRING
INSTALLATION:
Install with the shot end
hook toward the control
base side.
THROTTLE/CHOKE
CABLE (SOLID WIRE)
5 × 16 mm SCREW
CABLE HOLDER
STOPPER RUBBER
INSTALLATION:
To install the stopper rubber,
first align the boss with the
hole of the control lever
bracket, then turn the rubber
90° and secure it to the bracket
as shown.
CONTROL LEVER
LEVER SPRING
(1-LEVER TYPE)
CHOKE RETURN SPRING
INSTALLATION:
Install with the shot end
hook toward the control
base side.
5 × 16 mm SCREW (2)
THROTTLE CABLE
(SOLID WIRE)
CABLE HOLDER (2)
CHOKE CABLE
(SOLID WIRE)
CHOKE CONTROL LEVER
CONTROL LEVER
(2-LEVER TYPE)
44
TECHNICAL & CONSUMER INFORMATION
Carburetor Modification 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 plugs 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
5,000 feet (1,500 meters), 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 1,000-foot (300-meter) increase in altitude. The
effect of altitude on horsepower will be greater than this if no
carburetor modification is made.
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 5,000 feet (1,500 meters) 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.
45
TECHNICAL & CONSUMER INFORMATION
Oxygenated Fuels
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 an oxygenated fuel, be sure it is unleaded and meets the
minimum octane rating requirement.
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.
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 warranty.
46
TECHNICAL & CONSUMER INFORMATION
Emission Control System Information
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. and California Clean Air Acts
EPA and California 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.
47
TECHNICAL & CONSUMER INFORMATION
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.
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 and California 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 20. Remember that this
schedule is based on the assumption that your machine will be used
for its designed purpose. Sustained high-load or high-temperature
operation, or use in unusually wet or dusty conditions, will require
more frequent service.
48
TECHNICAL & CONSUMER INFORMATION
Air 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 to the engine’s emission durability period. The descriptive
term indicates the useful-life period for the engine’s emission control
system. See your Emission Control Warranty for additional
information.
Descriptive Term
Moderate
Applicable to Emissions Durability Period
50 hours (0－65 cc)
125 hours (greater than 65 cc)
Intermediate
Extended
125 hours (0－65 cc)
250 hours (greater than 65 cc)
300 hours (0－65 cc)
500 hours (greater than 65 cc)
The Air Index Information hang tag must remain on the engine until it
is sold. Remove the hang tag before operating the engine.
49
TECHNICAL & CONSUMER INFORMATION
Specifications
GCV520-QEA Type
18.0 × 16.8 × 13.0 in (456 × 427 × 331 mm)
67.2 lbs (30.5 kg)
Length × Width × Height
Dry weight
4-stroke, overhead camshaft, 2 cylinders (90° V-Twin)
32.3 cu-in (530 cm )
Engine type
Displacement
[3.03 × 2.24 in (77 × 57 mm)]
14 bhp (9.7 kW, 13.1 PS) at 3,600 rpm
26.5 lbf·ft (35.9 N·m, 3.66 kgf·m) at 2,500 rpm
0.51 lb/hph (313 g/kWh, 230 g/PSh)
Forced air
[Bore × Stroke]
Max. output
Max. torque
Fuel consumption
Cooling system
Ignition system
PTO shaft rotation
Transistorized magneto
Counterclockwise
GCV530-QEA Type
18.0 × 16.8 × 13.0 in (456 × 427 × 331 mm)
67.2 lbs (30.5 kg)
Length × Width × Height
Dry weight
4-stroke, overhead camshaft, 2 cylinders (90° V-Twin)
32.3 cu-in (530 cm )
Engine type
Displacement
[3.03 × 2.24 in (77 × 57 mm) ]
16 bhp (11.3 kW, 15.4 PS) at 3,600 rpm
26.9 lbf·ft (36.5 N·m, 3.72 kgf·m) at 2,500 rpm
0.51 lb/hph (313 g/kWh, 230 g/PSh)
Forced air
[Bore × Stroke]
Max. output
Max. torque
Fuel consumption
Cooling system
Ignition system
PTO shaft rotation
Transistorized magneto
Counterclockwise
GCV520/GCV530 Tuneup
ITEM
Spark plug gap
SPECIFICATION
0.028－0.031 in
MAINTENANCE
Refer to page: 31
(0.70－0.80 mm)
IN: 0.10±0.04 mm
EX: 0.15±0.04 mm
Valve clearance (cold)
Other specifications
See your authorized
Honda dealer
No other adjustments needed.
50
TECHNICAL & CONSUMER INFORMATION
Specifications
GXV530-QEA Type
18.0 × 16.8 × 13.0 in (456 × 427 × 331 mm)
67.2 lbs (30.5 kg)
Length × Width × Height
Dry weight
4-stroke, overhead camshaft, 2 cylinders (90° V-Twin)
32.3 cu-in (530 cm )
Engine type
Displacement
[ 3.03 × 2.24 in (77 × 57 mm)]
16 bhp (9.7 kW, 13.1 PS) at 3,600 rpm
26.5 lbf·ft (35.9 N·m, 3.66 kgf·m) at 2,500 rpm
0.51 lb/hph (313 g/kWh, 230 g/PSh)
Forced air
[Bore × Stroke]
Max. output
Max. torque
Fuel consumption
Cooling system
Ignition system
PTO shaft rotation
Transistorized magneto
Counterclockwise
GXV530 Tuneup
ITEM
Spark plug gap
SPECIFICATION
0.028－0.031 in
MAINTENANCE
Refer to page: 31
(0.70－0.80 mm)
IN: 0.10±0.04 mm
EX: 0.15±0.04 mm
Valve clearance (cold)
Other specifications
See your authorized
Honda dealer
No other adjustments needed.
51
TECHNICAL & CONSUMER INFORMATION
Wiring Diagrams
3A Charge Coil
52
TECHNICAL & CONSUMER INFORMATION
Wiring Diagrams
12A Charge Coil
53
TECHNICAL & CONSUMER INFORMATION
Wiring Diagrams
18A Charge Coil
54
TECHNICAL & CONSUMER INFORMATION
CONSUMER INFORMATION
Honda Publications
These publications will give you additional information for
maintaining and repairing your engine. You may order them from
your Honda engine dealer.
Shop Manual
This manual covers complete maintenance and overhaul procedures.
It is intended to be used by a skilled technician.
Parts Catalog
This manual provides complete, illustrated parts lists.
55
TECHNICAL & CONSUMER INFORMATION
Customer Service Information
Servicing dealership personnel are trained professionals. They should
be able to answer any questions you may have. If you encounter a
problem that your dealer does not solve to your satisfaction, please
discuss it with the dealership’s management. The Service Manager or
General Manager can help. Almost all problems are solved in this way.
If you are dissatisfied with the decision made by the dealership’s
management, contact the Honda Power Equipment Customer
Relations Office. You can write to:
American Honda Motor Co., Inc.
Power Equipment Division
Customer Relations Office
4900 Marconi Drive
Alpharetta, Georgia 30005-8847
Or telephone: (770) 497-6400
When you write or call, please give us this information:
Model and serial number (see page 42)
Name of dealer who sold the engine to you
Name and address of dealer who services your engine
Date of purchase
Your name, address and telephone number
A detailed description of the problem
56
QUICK REFERENCE INFORMATION
Fuel
Type
Unleaded gasoline with a pump
octane rating of 86 or higher
(page 21)
Engine Oil
Type
SAE 10W-30, API SJ, for
(page 26)
general use
Capacity
Without oil filter replacement:
0.95 US qt (0.90 )
With oil filter replacement:
1.11 US qt (1.05 )
Spark Plug
Type
Gap
NGK: BPR5ES
DENSO: W16EPR-U
0.028－0.031 in (0.70－0.80 mm)
(page 33)
＋200
Carburetor
Maintenance
Idle speed
Before
each use
First 20
hours
Subsequent
1,400
rpm
－150
Check engine oil level.
Check air filter.
Change engine oil.
Refer to the maintenance
schedule on page 20.
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