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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.

OWNER’S MANUAL

MANUEL DE L’UTILISATEUR

MANUAL DEL PROPIETARIO

GXV50 · GXV57

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

The engine exhaust from this product contains chemicals known to the State of

California to cause cancer, birth defects or other reproductive harm.

Your safety and the safety of others are very important. We have provided important safety messages in this manual and on the engine. Please read these messages carefully.

CONTENTS

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.

INTRODUCTION .......................

.1

SAFETY MESSAGES ................

.1

SAFETY INFORMATION ..........

.2

SAFETY LABEL LOCATION .....

.2

COMPONENT & CONTROL

LOCATION ................................

.2

FEATURES ................................

.3

BEFORE OPERATION

CHECKS ....................................

.3

OPERATION ..............................

.4

SAFE OPERATING

PRECAUTIONS .....................

.4

STARTING THE ENGINE ......

.4

SETTING ENGINE SPEED .....

.5

STOPPING THE ENGINE ......

.5

SERVICING YOUR ENGINE .....

.6

THE IMPORTANCE OF

MAINTENANCE ....................

.6

MAINTENANCE SAFETY ......

.6

SAFETY PRECAUTIONS .......

.6

MAINTENANCE

SCHEDULE ............................

.6

REFUELING ...........................

.7

ENGINE OIL ...........................

.7

Recommended Oil ............

.7

Oil Level Check ..................

.8

Oil Change .........................

.8

AIR CLEANER ........................

.9

Inspection ..........................

.9

Cleaning ............................

.9

SPARK PLUG ........................

.9

SPARK ARRESTER .............

.10

HELPFUL TIPS &

SUGGESTIONS ......................

.10

TRANSPORTING ................

.11

TAKING CARE OF

UNEXPECTED PROBLEMS ....

.12

Serial Number Location

Remote Control Linkage

High Altitude Operation

Information

Air Index

Specifications

Quick Reference

Information

Wiring Diagram

.....

.....

Carburetor Modifications for

.....

Emission Control System

.........................

.13

..............................

.14

.....................

Tuneup Specifications ........

.........................

..................

Distributor/Dealer Locator

.12

.12

.13

.14

.14

.15

.15

Information .........................

.16

Customer Service

Information .........................

.16

2006 Honda Motor Co., Ltd.

− All Rights Reserved

GXV50U·GXV57U

37Z4D602

00X37-Z4D-6020

ENGLISH

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SAFETY INFORMATION

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.

SAFETY LABEL LOCATION

COMPONENT & CONTROL LOCATION

STARTER GRIP RECOIL STARTER

OIL FILLER CAP/

DIPSTICK

MUFFLER

This indication warns you of potential hazards that can cause serious injury. Read it carefully.

OIL DRAIN PLUG

GXV50

OIL DRAIN PLUG

GXV57

FUEL CAP VENT KNOB

SPARK PLUG

FUEL FILLER CAP

FUEL TANK

READ OWNER’S MANUAL BEFORE OPERATION.

CHOKE LEVER FUEL VALVE LEVER

AIR CLEANER

2

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FEATURES BEFORE OPERATION CHECKS

Centrifugal Clutch (applicable types)

C L O S E

IS YOUR ENGINE READY TO GO?

The centrifugal clutch automatically engages and transmits power when engine speed is increased above approximately 2,900 rpm.

At idle speed, the clutch is disengaged.

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.

Do not run the engine without mounting it on equipment that includes the centrifugal clutch drum and housing, or centrifugal force will cause the clutch shoes to contact and damage the engine case.

Fuel tank Vent

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.

The cap is provided with a vent knob to seal the fuel tank.

Open the fuel tank vent by turning the vent knob at least 2 or 3 turns conuterclockwise.

Always perform a pre-operation inspection before each operation, and correct any problem.

Before beginning your preoperation checks, be sure the engine is level and the engine switch on the equipment is in the OFF position.

O P E N

FUEL FILLER CAP

Always check the following items before you start the engine:

Check the General Condition of the Engine

FUEL CAP

VENT KNOB

1.

Look around and underneath the engine for signs of oil or gasoline leaks.

2.

Remove any excessive dirt or debris, especially around the muffler and recoil starter.

3.

Look for signs of damage.

4.

Check that all shields and covers are in place, and all nuts, bolts, and screws are tightened.

Check the Engine

1.

Check the fuel level (see page 7 ). Starting with a full tank will help to eliminate or reduce operating interruptions for refueling.

2.

Check the engine oil level (see page 8 ). Running the engine with a low oil level can cause engine damage.

3.

Check the air filter element (see page 9 ). A dirty air filter element will restrict air flow to the carburetor, reducing engine performance.

4.

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.

ENGLISH

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OPERATION

SAFE OPERATING PRECAUTIONS

Before operating the engine for the first time, please review the

SAFETY INFORMATION section on page 2 and the BEFORE

OPERATION CHECKS on page 3 .

3.

To start a cold engine, move the choke lever to the CLOSED position.

To restart a warm engine, leave the choke lever in the OPEN position.

CHOKE 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.

STARTING THE ENGINE

1.

Open the fuel tank vent by turning the vent knob at least 2 or 3 turns conuterclockwise.

FUEL CAP VENT KNOB

O P E N

C L O S E D

O P E N CLOSED

4.

Turn the engine switch on the equipment to the ON position.

5.

Pull the starter grip lightly until you feel resistance, then pull briskly in the direction of the arrow as shown below. Return the starter grip gently.

D i r e c t i o n t o p u l l

O P E N

2.

Turn the fuel valve lever to the ON position.

ON

FUEL VALVE LEVER

(EQUIPMENT SIDE)

STARTER GRIP

Do not allow the starter grip to snap back against the engine.

Return it gently to prevent damage to the starter.

6.

If the choke lever was moved to the CLOSED position to start the engine, gradually move it to the OPEN position as the engine warms up.

CHOKE LEVER

O P E N

O P E N

4

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SETTING ENGINE SPEED

Position the throttle lever for the desired engine speed.

The throttle 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 for engine speed recommendations.

STOPPING THE ENGINE

To stop the engine in an emergency, simply turn the engine switch on the equipment to the OFF position. Under normal conditions, use the following procedure.

1.

Move the throttle lever to the MIN. position.

The throttle 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.

M A X .

M I N .

T H R O T T L E L E V E R

T H R O T T L E L E V E R

MIN.

2.

Turn the engine switch on the equipment to the OFF position.

3.

Turn the fuel valve lever to the OFF position.

FUEL VALVE LEVER

OFF

4.

Close the fuel tank vent by turning vent knob clockwise.

VENT KNOB

C L O S E

ENGLISH

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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.

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 non-flammable 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.

MAINTENANCE SCHEDULE

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.

REGULAR SERVICE PERIOD (1)

Perform at every indicated month or operating hour interval, whichever comes first.

ITEM

Engine oil

Air cleaner

Spark plug

Check level

Change

Check

Clean

Check-adjust

Replace

Clean Spark arrester

(applicable types)

Fuel tank and filter

Idle speed

Valve clearance

Combustion chamber

Fuel tubes

Clean

Check-adjust

Check-adjust

Clean

Check

Each use

First Every Every Every Every month or

3 6 months months

10 hrs.

or or year or

100

2years or

300

25 hrs.

50 hrs.

hrs.

hrs.

Refer to page

8

(3)

9

(2)

9

10

(4)

(4)

(4)

After every 300 hrs. (4)

Every 2 years (Replace if necessary) (4)

＊

＊

＊

＊

＊

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.

＊ : See shop manual.

(1) For commercial use, log hours of operation to determine proper maintenance intervals.

(2) Service more frequently when used in dusty areas.

(3) Change engine oil every 25 hours when used under heavy load or in high ambient temperatures.

(4) These items should be serviced by your servicing dealer, unless you have the proper tools and are mechanically proficient. Refer to the Honda shop manual for service procedures.

Failure to follow this maintenance schedule could result in nonwarrantable failures.

6

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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 carefully to avoid spilling fuel. Do not fill the fuel tank completely. It may be necessary to lower the fuel level depending on operating conditions. After refueling, tighten the fuel filler cap securely.

Keep gasoline away from appliance pilot lights, barbecues, electric appliances, power tools, etc.

This engine is certified to operate on unleaded gasoline with a pump octane rating of 86 or higher (a research octane rating of 91 or higher).

Refuel in a well-ventilated area with the engine stopped. If the engine has been running, allow it to cool first. Never refuel the engine inside a building where gasoline fumes may reach flames or sparks.

You may use regular unleaded gasoline containing no more than

10% Ethanol (E10) or 5% Methanol by volume. In addition,

Methanol must contain cosolvents and corrosion inhibitors. Use of fuels with content of Ethanol or Methanol greater than shown above may cause starting and/or performance problems. It may also damage metal, rubber, and plastic parts of the fuel system.

Engine damage or performance problems that result from using a fuel with percentages of Ethanol or Methanol greater than shown above are not covered under warranty.

Spilled fuel is not only a fire hazard, it causes environmental damage. Wipe up spills immediately.

ENGINE OIL

Oil is a major factor affecting performance and service life. Use

4-stroke automotive detergent oil.

Recommended Oil

Use 4-stroke motor oil that meets or exceeds the requirements for API service classification SJ or later (or equivalent). Always check the

API service label on the oil container to be sure it includes the letters SJ or later (or equivalent).

SAE Viscosity Grades

AMBIENT TEMPERATURE

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.

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.

The recommended operating range of this engine is

(23°F to 104°F).

− 5°C to 40°C

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.

1.

With the engine stopped and on a level surface, remove the fuel filler cap and check the fuel level. Refill the tank if the fuel level is low.

2.

Add fuel to the bottom of the fuel level mark of the fuel tank. Do not overfill. Wipe up spilled fuel before starting the engine.

FUEL FILLER CAP

FUEL LEVEL MARK

MAXIMUM FUEL

LEVEL

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Oil Level Check

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.

2.

Insert the oil filler cap/dipstick into the oil filler neck as shown, but do not screw it in, then remove it to check the oil level.

3.

If the oil level is near or below the lower limit mark on the dipstick, fill with the recommended oil (see page 7 ) to the upper limit mark.

3.

With the engine in a level position, fill to the upper limit mark on the dipstick with the recommended oil (see page 7 ).

OIL FILLER CAP/DIPSTICK

UPPER LIMIT

OIL FILLER CAP/DIPSTICK

LOWER LIMIT

UPPER LIMIT

Running the engine with a low oil level can cause engine damage.

4.

Reinstall the oil filler cap/dipstick and tighten securely.

LOWER LIMIT

4.

Reinstall the oil filler cap/dipstick and tighten securely.

Running the engine with a low oil level can cause engine damage.

Oil Change

Drain the used oil when 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, oil drain plug and washer.

2.

Allow the used oil to drain completely, then reinstall the oil drain 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 pour it down a drain.

OIL FILLER CAP/DIPSTICK

DRAIN PLUG

8

SEALING WASHER

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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.

Recommended Spark Plugs:

U16FSR-UB (DENSO)

The recommended spark plug has the correct heat range for normal engine operating temperatures.

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.

An incorrect spark plug can cause engine damage.

For good performance, the spark plug must be properly gapped and free of deposits.

Inspection

1.

Disconnect the spark plug cap, and remove any dirt from around the spark plug area.

Press the upper latch tab on the top of the air cleaner cover, and remove the cover. Check the filter element to be sure it is clean and in good condition.

2.

Remove the spark plug with a 5/8-inch spark plug wrench.

SPARK PLUG CAP

If the filter element is dirty, clean it as described on this page.

Replace the filter element if it is damaged.

Reinstall the filter element and air cleaner cover securely.

Cleaning

1.

Clean the filter element in warm soapy water, rinse, and allow to dry thoroughly. Or clean in nonflammable solvent and allow to dry.

2.

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.

SPARK PLUG WRENCH

3.

Wipe dirt from the air cleaner body and cover, using a moist rag.

Be careful to prevent dirt from entering the carburetor.

3.

Inspect the spark plug.

Replace it if damaged or badly fouled, if the sealing washer is in poor condition, or if the electrode is worn.

SIDE ELECTRODE

0.60

− 0.70 mm

(0.024

− 0.028 in)

LOWER TABS

AIR CLEANER BODY

FILTER ELEMENT

UPPER TABS

AIR CLEANER COVER

4.

Measure the spark plug electrode gap with a wiretype feeler gauge. Correct the gap, if necessary, by carefully bending the side electrode.

The gap should be:

0.60

− 0.70 mm (0.024

− 0.028 in)

5.

Install the spark plug carefully, by hand, to avoid crossthreading.

SEALING

WASHER

6.

After the spark plug is seated, tighten with a 5/8-inch spark plug wrench to compress the sealing washer.

7.

When installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the washer.

8.

When reinstalling the original spark plug, tighten 1/8 − 1/4 turn 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.

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SPARK ARRESTER (applicable types)

HELPFUL TIPS & SUGGESTIONS

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.

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.

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 bolts from the muffler protector, and remove the muffler protector.

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.

2.

Remove the special screw from the spark arrester, and remove the spark arrester from the muffler.

MUFFLER

SPARK ARRESTER

MUFFLER

PROTECTOR

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.

SPECIAL SCREW

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.

5 mm BOLTS

Fuel system damage or engine performance problems resulting from neglected storage preparation are not covered under the

Distributor’s Limited Warranty.

Spark Arrester Cleaning & Inspection 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.

1.

Use a brush to remove carbon deposits from the spark arrester screen. Be careful to avoid damaging the screen.

Adding a Gasoline Stabilizer to Extend Fuel Storage Life

The spark arrester must be free of breaks and holes. Replace the spark arrester if it is damaged.

SPARK ARRESTER SCREEN

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 turn the fuel valve lever to the OFF position

(see page 5 ).

2.

Install the spark arrester, and muffler protector in the reverse order of disassembly.

10

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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.

DRAIN BOLT

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.

1.

Place an approved gasoline container below the carburetor, and use a funnel to avoid spilling fuel.

Keep the engine level in storage. Tilting can cause fuel or oil leakage.

2.

Remove the carburetor drain bolt and gasket, then turn the fuel valve lever to the ON position.

CARBURETOR

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.

GASKET

Removal from Storage

Check your engine as described in the BEFORE OPERATION

CHECKS section of this manual (see page 3 ).

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.

3.

After all fuel has drained into the container, reinstall the carburetor drain bolt and gasket. Tighten the carburetor drain bolt securely.

If the cylinder was coated with oil during storage preparation, the engine will smoke briefly at startup. This is normal.

TRANSPORTING

Engine Oil

Change the engine oil (see page 8 ).

Engine Cylinder

1.

Remove the spark plug (see page 9 ).

2.

Pour a tablespoon 5 − 10 cm (5 − 10 cc) of clean engine oil into the cylinder.

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 lever to the OFF position. Close the fuel tank vent by turning vent knob clockwise.

3.

Pull the starter grip several times to distribute the oil in the cylinder.

4.

Reinstall the spark plug.

5.

Pull the starter grip slowly until resistance is felt and the notch on the starter pulley aligns with the hole at the top of the recoil starter cover. This will close the valves so moisture cannot enter the engine cylinder. Return the starter grip gently.

Align the rib on the flywheel with the notch on the fan cover.

ENGLISH

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TAKING CARE OF UNEXPECTED PROBLEMS

ENGINE WILL

NOT START

1.

Check control positions.

Possible Cause

Vent knob

CLOSE

Fuel valve OFF.

Correction

Open vent knob.

2.

Check fuel.

3.

Remove and inspect spark plug.

4.

Take engine to an authorized

Honda servicing dealer, or refer to shop manual.

Choke open.

Engine switch

OFF.

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.

Move lever to ON position.

Move lever to

CLOSED position unless the engine is warm.

Turn engine switch to ON position.

Refuel (p. 7).

Drain fuel tank and carburetor (p. 11).

Refuel with fresh gasoline (p. 7).

Gap or replace spark plug (p. 9).

Dry and reinstall spark plug. Start engine with throttle lever in

MAX. position.

Replace or repair faulty components as necessary.

ENGINE LACKS

POWER

1.

Check air filter.

2.

Check fuel.

3.

Take engine to an authorized

Honda servicing dealer, or refer to shop manual.

Possible Cause

Filter element 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 (p. 9).

Drain fuel tank and carburetor (p. 11).

Refuel with fresh gasoline (p. 7).

Replace or repair faulty components as necessary.

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: ___ ___ ___ ___

Date Purchased: ______ / ______ / ______

Remote Control Linkage

The throttle lever is provided with a hole for cable attachment.

THROTTLE CABLE

5 mm SCREW

ENGINE TYPE

ENGINE SERIAL NUMBER

CABLE CLAMP

THROTTLE LEVER

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Carburetor Modifications for High Altitude Operation Emission Control System Information

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.

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.

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.

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.

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.

The following instructions and procedures must be followed in order to keep the emissions from your Honda engine within the emission standards.

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.

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.

Hard starting or stalling after starting.

Rough idle.

Misfiring or backfiring under load.

Afterburning (backfiring).

Black exhaust smoke or high fuel consumption.

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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.

Specifications

GXV50 (PTO shaft S type)

Length × Width

Height

×

Dry weight

Engine type

Displacement

[Bore × Stroke]

249 × 286 × 225 mm

(9.8

× 11.3

× 8.9 in)

5.2 kg (11.5 lbs)

4-stroke, overhead valve, single cylinder

49 cm (3.0 cu-in)

Max. output

Max. torque

[41.8

× 36 mm (1.65

× 1.42 in)]

1.8 kW (2.5 PS, 2.5 bhp) at 7,000 rpm

3.04 N·m (0.31 kgf·m, 2.2 lbf·ft) at

4,500 rpm

Engine oil capacity

Fuel tank capacity

Fuel consumption

Cooling system

Ignition system

PTO shaft rotation

0.25

0.27

(0.26 US qt , 0.22 Imp qt)

(0.071 US gal , 0.059 Imp gal)

340 g/kWh (250 g/PSh, 0.55 lb/hph)

Forced air

Transistorized magneto

Counterclockwise Maintenance

Follow the maintenance schedule on page 6 . Remember that this 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.

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 System

Warranty for additional information.

Tuneup Specifications

ITEM

Spark plug gap

Descriptive Term

Moderate

Intermediate

Extended

Applicable to Emissions Durability Period

50 hours [0

125 hours [0

−

−

80 cm (0

80 cm (0

−

−

80 cc) inclusive]

125 hours [greater than 80 cm (80 cc)]

80 cc) inclusive]

250 hours [greater than 80 cm (80 cc)]

300 hours [0 − 80 cm (0 − 80 cc) inclusive]

500 hours [greater than 80 cm (80 cc)]

1,000 hours [225 cm (225 cc) and greater]

GXV57 (PTO shaft S type)

Length × Width ×

Height

Dry weight

Engine type

249 × 286 × 240 mm

(9.8

× 11.3

× 9.4 in)

5.4 kg (11.9 lbs)

4-stroke, overhead valve, single cylinder

Displacement

[Bore × Stroke]

Max. output

Max. torque

57 cm (3.5 cu-in)

[45.0

× 36 mm (1.77

× 1.42 in)]

1.5 kW (2.0 PS, 2.0 bhp) at 4,800 rpm

Engine oil capacity

3.22 N·m (0.33 kgf·m, 2.3 lbf·ft) at

4,000 rpm

0.25

(0.26 US qt , 0.22 Imp qt)

Fuel tank capacity

Fuel consumption

Cooling system

Ignition system

PTO shaft rotation

0.27

(0.071 US gal , 0.059 Imp gal)

330 g/kWh (243 g/PSh, 0.54 lb/hph)

Forced air

Transistorized magneto

Counterclockwise

Idle speed

Valve clearance

(cold)

Other specifications

SPECIFICATION MAINTENANCE

0.60

− 0.70 mm

(0.024

− 0.028 in)

2,500 ± 200 rpm

Refer to page: 9

See your

IN: 0.08

± 0.02 mm

EX: 0.11

± 0.02 mm authorized

Honda dealer

No other adjustments needed.

The Air Index Information hang tag/label must remain on the engine until it is sold. Remove the hang tag before operating the engine.

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Quick Reference Information

Fuel

Engine oil

Spark plug

Maintenance

Unleaded gasoline (Refer to page 7)

U.S.

Except

Pump octane rating 86 or higher

Research octane rating 91 or higher

U.S.

Pump octane rating 86 or higher

SAE 10W-30, API SJ or later, for general use.

Refer to page 7.

CR5HSB (NGK)

U16FSR-UB (DENSO)

Before each use:

Check engine oil level. Refer to page 8.

Check air filter. Refer to page 9.

First 10 hours:

Change engine oil. Refer to page 8.

Subsequent:

Refer to the maintenance schedule on page 6.

Wiring Diagram

Bl

(2)

(3)

(1)

(1)

(2)

(3)

SPARK PLUG

IGNITION COIL

Engine switch on the equipment powered by the engine.

Bl Black

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CONSUMER INFORMATION

Distributor/Dealer Locator Information

United States, Puerto Rico, and U.S. Virgin Islands:

Call (800) 426-7701 or visit our website: www.honda-engines.com

Canada:

Call (888) 9HONDA9 or visit our website: www.honda.ca

For European Area: visit our website: http://www.honda-engines-eu.com

Customer Service Information

Servicing dealership personnel are trained professionals. They should be able to answer any question 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, General Manager, or Owner can help.

Almost all problems are solved in this way.

United States, Puerto Rico, and U.S. Virgin Islands:

If you are dissatisfied with the decision made by the dealership’s management, contact the Honda Regional Engine Distributor for your area.

If you are still dissatisfied after speaking with the Regional Engine

Distributor, you may contact the Honda Office as shown.

All Other Areas:

If you are dissatisfied with the decision made by the dealership’s management, contact the Honda Office as shown.

《 Honda’s Office 》

When you write or call, please provide this information:

Equipment manufacturer’s name and model number that the engine is mounted on

Engine model, serial number, and type (see page 12 )

Name of dealer who sold the engine to you

Name, address, and contact person of the dealer who services your engine

Date of purchase

Your name, address and telephone number

A detailed description of the problem

United States, Puerto Rico, and U.S. Virgin Islands:

American Honda Motor Co., Inc.

Power Equipment Division

Customer Relations Office

4900 Marconi Drive

Alpharetta, GA 30005-8847

Or telephone: (770) 497-6400, 8:30 am - 8:00 pm EST

Canada:

Honda Canada, Inc.

715 Milner Avenue

Toronto, ON

M1B 2K8

Telephone: (888) 9HONDA9

(888) 946-6329

English: (416) 299-3400

French:

Facsimile:

(416) 287-4776

(877) 939-0909

(416) 287-4776

Toll free

Local Toronto dialing area

Local Toronto dialing area

Toll free

Local Toronto dialing area

Australia:

Honda Australia Motorcycle and Power Equipment Pty. Ltd.

1954 − 1956 Hume Highway Campbellfield Victoria 3061

Telephone:

Facsimile:

(03) 9270 1111

(03) 9270 1133

For European Area:

Honda Europe NV.

European Engine Center http://www.honda-engines-eu.com

All Other Areas:

Please contact the Honda distributor in your area for assistance.

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