HONDA GXH50 User Manual [en, es, fr]

INTRODUCTION

Thank you for purchasing a Honda engine. We want to help you to get the best results from your new engine and to operate it safely. This manual contains information on how to do that; please read it carefully before operating the engine. If a problem should arise, or if you have any questions about your engine, consult an authorized Honda servicing dealer.

All information in this publication is based on the latest product information available at the time of printing. Honda Motor Co., Ltd. reserves the right to make changes at any time without notice and without incurring any obligation. No part of this publication may be reproduced without written permission.

This manual should be considered a permanent part of the engine and should remain with the engine if resold.

Review the instructions provided with the equipment powered by this engine for any additional information regarding engine startup, shutdown, operation, adjustments or any special maintenance instructions.

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

We suggest you read the warranty policy to fully understand its coverage and your responsibilities of ownership. The warranty policy is a separate document that should have been given to you by your dealer.

SAFETY MESSAGES

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.

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.

2007 Honda Motor Co., Ltd. All Rights Reserved

GXH50U

37Z4C603 00X37-Z4C-6030

MANUEL DE L’UTILISATEUR	ENGLISH
OWNER’S MANUAL
MANUAL DEL PROPIETARIO
GXH50
	FRANÇAIS

The engine exhaust from this product	ESPAÑOL
contains chemicals known to the State of
California to cause cancer, birth defects
or other reproductive harm.

CONTENTS
INTRODUCTION........................	1
SAFETY MESSAGES.................	1
SAFETY INFORMATION ...........	2
COMPONENT & CONTROL
LOCATION .................................	2
FEATURES.................................	2
BEFORE OPERATION
CHECKS .....................................	3
OPERATION...............................	3
SAFE OPERATING
PRECAUTIONS ......................	3
STARTING THE ENGINE .......	3
SETTING ENGINE SPEED......	4
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
STORING YOUR ENGINE....	10
TRANSPORTING .................	12
TAKING CARE OF
UNEXPECTED PROBLEMS .....	12
TECHNICAL INFORMATION...	13
Serial Number Location ......	13
Carburetor Modifications for
High Altitude Operation ......	13
Emission Control System
Information ..........................	14
Air Index...............................	14
Specifications ......................	15
Tuneup Specifications.........	15
Quick Reference
Information ..........................	15
Wiring Diagrams .................	15
CONSUMER INFORMATION..16
Distributor/Dealer Locator
Information ..........................	16
Customer Service
Information ..........................	16

ENGLISH

1

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.

COMPONENT & CONTROL LOCATION

SPARK PLUG

CHOKE LEVER

AIR CLEANER

THROTTLE LEVER

OIL FILLER CAP/

DIPSTICK

OIL DRAIN PLUG	STARTER GRIP	RECOIL STARTER
FUEL FILLER CAP		FUEL TANK

MUFFLER

FUEL VALVE LEVER

ENGINE SWITCH

FEATURES

Oil Alert System (applicable types)

‘‘Oil Alert is a registered trademark in the United States’’

System 1 (applicable types)

The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oil in the crankcase. Before the oil level in the crankcase can fall below a safe limit, the Oil Alert system will automatically stop the engine (the engine switch will remain in the ON position).

If the engine stops and will not restart, check the engine oil level (see page 8 ) before troubleshooting in other areas.

System 2 (applicable types)

The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oil in the crankcase. Before the oil level in the crankcase can fall below a safe limit, the Oil Alert system will prevent the engine from starting.

If the engine will not start, check the engine oil level (see page 8 ) before troubleshooting in other areas.

2

ENGLISH

BEFORE OPERATION CHECKS

IS YOUR ENGINE READY TO GO?

For your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate the engine to check its condition. Be sure to take care of any problem you find, or have your servicing dealer correct it, before you operate the engine.

Improperly maintaining this engine, or failure to correct a problem before operation, can cause a malfunction in which you can be seriously hurt or killed.

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

Before beginning your pre-operation checks, be sure the engine is level and the engine switch is in the OFF position.

Always check the following items before you start the engine:

Check the General Condition of the Engine

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

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.

The Oil Alert system (applicable types) will automatically stop the engine before the oil level falls below safe limits. However, to avoid the inconvenience of an unexpected shutdown, always check the engine oil level before startup.

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.

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 this page.

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. Move the fuel valve lever to the ON position.

FUEL VALVE LEVER

ON

ON

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

CHOKE LEVER

CLOSED

OPEN

CLOSED

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

ENGLISH

3

3.Turn the engine switch to the ON position.

ENGINE SWITCH

ON

ON

4.Pull the starter grip lightly until you feel resistance, then pull briskly. Return the starter grip gently.

(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.

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

CHOKE LEVER

OPEN

OPEN	CLOSED

SETTING ENGINE SPEED

Position the throttle lever for the desired engine speed.

For engine speed recommendations, refer to the instructions provided with the equipment powered by this engine.

MAX.

MAX.

MIN.

THROTTLE LEVER	MIN.

4

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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 MIN. position.

MIN.

THROTTLE LEVER

MIN.

2. Turn the engine switch to the OFF position.

ENGINE SWITCH

OFF

OFF

3. Turn the fuel valve lever to the OFF position.

OFF

OFF

FUEL VALVE

LEVER

ENGLISH

5

SERVICING YOUR ENGINE

THE IMPORTANCE OF MAINTENANCE

Good maintenance is essential for safe, economical and troublefree operation. It will also help reduce pollution.

Improper maintenance, or failure to correct a problem before operation, can cause a malfunction in which you can be seriously hurt or killed.

Always follow the inspection and maintenance recommendations and schedules in this owner’s manual.

To help you properly care for your engine, the following pages include a maintenance schedule, routine inspection procedures, and simple maintenance procedures using basic hand tools. Other service tasks that are more difficult, or require special tools, are best handled by professionals and are normally performed by a Honda technician or other qualified mechanic.

The maintenance schedule applies to normal operating conditions. If you operate your engine under severe conditions, such as sustained high-load or high-temperature operation, or use in unusually wet or dusty conditions, consult your servicing dealer for recommendations applicable to your individual needs and use.

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any engine repair establishment or individual, using parts that are ‘‘certified’’ to EPA standards.

MAINTENANCE SAFETY

Some of the most important safety precautions follow. However, we cannot warn you of every conceivable hazard that can arise in performing maintenance. Only you can decide whether or not you should perform a given task.

Failure to properly follow maintenance instructions and precautions can cause you to be seriously hurt or killed.

Always follow the procedures and precautions in this owner’s manual.

SAFETY PRECAUTIONS

Make sure the engine is off before you begin any maintenance or repairs. This will eliminate several potential hazards:

Carbon monoxide poisoning from engine exhaust.

Operate outside away from open windows or doors.

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

	REGULAR SERVICE PERIOD (1)			Each	First	Every 3	Every 6	Every	Every 2	Refer
	Perform at every indicated month			use	month	months	months	year	years	to
	or operating hour interval,				or	or	or	or	or	page
	whichever comes first.				10 hrs.	25 hrs.	50 hrs.	100 hrs.	300 hrs.
	ITEM
	Engine oil	Check level								8
		Change					(3)
	Air filter	Check								9
		Clean				(2)
	Spark plug	Check-adjust								9
		Replace
	Spark arrester	Clean								10
	(applicable types)
	Fuel tank and	Clean						(4)
	filter
	Idle speed	Check-adjust						(4)
	Valve clearance	Check-adjust							(4)
	Combustion chamber	Clean			After every 300 hrs. (4)
	Fuel tube	Check		Every 2 years (Replace if necessary) (4)

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 Honda 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

ENGLISH

REFUELING

Recommended Fuel

Unleaded gasoline

U.S.	Pump octane rating 86 or higher
Except U.S.	Research octane rating 91 or higher
	Pump octane rating 86 or higher

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.

Gasoline is highly flammable and explosive, and you can be burned or seriously injured when refueling.

Stop engine and keep heat, sparks, and flame away.

Refuel only outdoors. Wipe up spills immediately.

Fuel can damage paint and some types of plastic. Be careful not to spill fuel when filling your fuel tank. Damage caused by spilled fuel is not covered under the Distributor’s Limited Warranty.

Never use stale or contaminated gasoline or oil/gasoline mixture. Avoid getting dirt or water in the fuel tank.

Move at least 1 meter (3 feet) away from the fueling source and site before starting the engine.

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

3.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.

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

AMBIENT TEMPERATURE

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.

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7

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 (bottom edge of the oil fill hole). Do not overfill.

4.Reinstall the oil filler cap/dipstick.

OIL FILLER CAP/DIPSTICK

UPPER LIMIT

OIL FILLER CAP/
DIPSTICK	OIL FILL HOLE	LOWER LIMIT
	(bottom edge)

Running the engine with a low oil level can cause engine damage. This type of damage is not covered by the Distributor’s Limited Warranty.

The Oil Alert system (applicable types) will automatically stop the engine before the oil level falls below the safe limit. However, to avoid the inconvenience of an unexpected shutdown, always check the engine oil level before startup.

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

SEALING

WASHER

OIL DRAIN PLUG

3.With the engine in a level position, fill with the recommended oil (see page 7 ) to the upper limit mark (bottom edge of the oil fill hole).

OIL FILLER CAP/DIPSTICK

UPPER LIMIT

LOWER LIMIT

Running the engine with a low oil level can cause engine damage. This type of damage is not covered by the Distributor’s Limited Warranty.

The Oil Alert system (applicable types) will automatically stop the engine before the oil level falls below the safe limit. However, to avoid the inconvenience of an unexpected shutdown, fill to the upper limit, and check the oil level regularly.

4. Reinstall the oil filler cap/dipstick securely.

8

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AIR CLEANER

A dirty air cleaner will restrict air flow to the carburetor, reducing engine performance. If you operate the engine in very dusty areas, clean the air filter more often than specified in the MAINTENANCE SCHEDULE.

Operating the engine without an air filter, or with a damaged air filter, will allow dirt to enter the engine, causing rapid engine wear. This type of damage is not covered by the Distributor’s Limited Warranty.

Inspection

Remove the air cleaner cover and inspect the filter element. Clean or replace a dirty filter element. Always replace a damaged filter element.

Cleaning

1.Clean the filter element in warm soapy water, rinse, and allow to dry thoroughly. Or clean in non-flammable 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 element.

3.Wipe dirt from the air cleaner body and cover, using a moist rag. Be careful to prevent dirt from entering the carburetor.

AIR CLEANER BODY

AIR CLEANER COVER

FILTER

ELEMENT

SPARK PLUG

Recommended Spark Plugs: CR5HSB (NGK)

U16FSR-UB (DENSO)

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

An incorrect spark plug can cause engine damage.

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

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

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

SPARK PLUG WRENCH

SPARK PLUG CAP

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.	0.60 0.70 mm
		(0.024 0.028 in)
	4. Measure the spark plug
	electrode gap with a wire-	SEALING
	type feeler gauge. Correct the

WASHER

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.

SIDE ELECTRODE

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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9

SPARK ARRESTER (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 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.

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

MUFFLER

SPECIAL SCREW

SPARK ARRESTER

MUFFLER PROTECTOR 5 mm

BOLTS

Spark Arrester Cleaning & Inspection

1.Use a brush to remove carbon deposits from the spark arrester screen. Be careful not to damage the screen. Replace the spark arrester if it has breaks or holes.

SPARK ARRESTER SCREEN

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

HELPFUL TIPS & SUGGESTIONS

STORING YOUR ENGINE

Storage Preparation

Proper storage preparation is essential for keeping your engine trouble-free and looking good. The following steps will help to keep rust and corrosion from impairing your engine’s function and appearance, and will make the engine easier to start when you use it again.

Cleaning

If the engine has been running, allow it to cool for at least half an hour before cleaning. Clean all exterior surfaces, touch up any damaged paint, and coat other areas that may rust with a light film of oil.

Using a garden hose or pressure washing equipment can force water into the air cleaner or muffler opening. Water in the air cleaner will soak the air filter, and water that passes through the air filter or muffler can enter the cylinder, causing damage.

Fuel

Gasoline will oxidize and deteriorate in storage. Deteriorated gasoline will cause hard starting, and it leaves gum deposits that clog the fuel system. If the gasoline in your engine deteriorates during storage, you may need to have the carburetor and other fuel system components serviced or replaced.

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.

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

Distributor’s Limited Warranty.

You can extend fuel storage life by adding a gasoline stabilizer that is formulated for that purpose, or you can avoid fuel deterioration problems by draining the fuel tank and carburetor.

Adding a Gasoline Stabilizer to Extend Fuel Storage Life

When adding a gasoline stabilizer, fill the fuel tank with fresh gasoline. If only partially filled, air in the tank will promote fuel deterioration during storage. If you keep a container of gasoline for refueling, be sure that it contains only fresh gasoline.

1.Add gasoline stabilizer following the manufacturer’s instructions.

2.After adding a gasoline stabilizer, run the engine outdoors for 10 minutes to be sure that treated gasoline has replaced the untreated gasoline in the carburetor.

3.Stop the engine, and move the fuel valve lever to the OFF position.

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.

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

2.Drain the fuel tank and carburetor.

CARBURETOR EQUIPPED WITH A DRAIN HOSE AND SCREW: Loosen the carburetor drain screw, then move the fuel valve to the ON position.

CARBURETOR

DRAIN HOSE

DRAIN SCREW

CARBURETOR EQUIPPED WITH DRAIN BOLT:

Remove the carburetor drain bolt, then move the fuel valve to the ON position.

CARBURETOR

DRAIN BOLT

3.After all the fuel has drained into the container, reinstall the drain bolt (carburetor equipped with a drain bolt type only). Tighten the drain bolt or drain screw securely.

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.

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 rib on the flywheel aligns with the notch on the fan 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.

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11

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.

Keep the engine level in storage. 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.

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.

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

TRANSPORTING

If the engine has been running, allow it to cool for at least 15 minutes before loading the engine-powered equipment on the transport vehicle. A hot engine and exhaust system can burn you and can ignite some materials.

Keep the engine level when transporting to reduce the possibility of fuel leakage. Turn the fuel valve to the OFF position (see

page 5 ).

TAKING CARE OF UNEXPECTED PROBLEMS

ENGINE WILL	Possible Cause	Correction
NOT START
1. Check control	Fuel valve OFF.	Move lever to ON
positions.		position.
	Choke open.	Move lever to
		CLOSED position
		unless the engine
		is warm.
	Engine switch	Turn engine switch
	OFF.	to ON position.
2. Check engine	Engine oil level	Fill with the
oil level.	low	recommended oil
	(Oil Alert stops	to the proper level
	engine).	(p. 8).
3. Check fuel.	Out of fuel.	Refuel (p. 7).
	Bad fuel; engine	Drain fuel tank and
	stored without	carburetor (p. 11).
	treating or	Refuel with fresh
	draining	gasoline (p. 7).
	gasoline, or
	refueled with
	bad gasoline.
4. Remove and	Spark plug faulty,	Gap or replace
inspect spark	fouled, or	spark plug (p. 9).
plug.	improperly
	gapped.
	Spark plug wet	Dry and reinstall
	with fuel	spark plug. Start
	(flooded engine).	engine with
		throttle lever in
		MAX. position.
5. Take engine to	Fuel filter	Replace or repair
an authorized	restricted,	faulty components
Honda	carburetor	as necessary.
servicing	malfunction,
dealer, or refer	ignition
to shop	malfunction,
manual.	valves stuck, etc.

ENGINE LACKS	Possible Cause	Correction
POWER
1. Check air filter.	Filter element	Clean or replace
	restricted.	filter element
		(p. 9).
2. Check fuel.	Bad fuel; engine	Drain fuel tank and
	stored without	carburetor (p. 11).
	treating or	Refuel with fresh
	draining	gasoline (P. 7).
	gasoline, or
	refueled with
	bad gasoline.
3. Take engine to	Fuel filter	Replace or repair
an authorized	restricted,	faulty components
Honda	carburetor	as necessary.
servicing	malfunction,
dealer, or refer	ignition
to shop	malfunction,
manual.	valves stuck, etc.

12

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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 TYPE

ENGINE SERIAL NUMBER

Engine serial number: __ __ __ __ __ __ __ __ __ __ __

Engine type: ___ ___ ___ ___

Date Purchased: ______ / ______ / ______

Carburetor Modifications for High Altitude Operation

At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug and cause hard starting. Operation at an altitude that differs from that at which this engine was certified, for extended periods of time, may increase emissions.

High altitude performance can be improved by specific modifications to the carburetor. If you always operate your engine at altitudes above 1,500 meters (5,000 feet), have your servicing dealer perform this carburetor modification. This engine, when operated at high altitude with the carburetor modifications for high altitude use, will meet each emission standard throughout its useful life.

Even with carburetor modification, engine horsepower will decrease about 3.5% for each 300-meter (1,000-foot) increase in altitude. The effect of altitude on horsepower will be greater than this if no carburetor modification is made.

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.

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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. Additionally, Honda fuel systems utilize components and control technologies to reduce evaporative emissions.

The U.S., California Clean Air Acts and Environment Canada

EPA, California and Canadian regulations require all manufacturers to furnish written instructions describing the operation and maintenance of emission control systems.

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

Tampering and Altering

Tampering with or altering the emission control system may increase emissions beyond the legal limit. Among those acts that constitute tampering are:

Removal or alteration of any part of the intake, fuel, or exhaust systems.

Altering or defeating the governor linkage or speed-adjusting mechanism to cause the engine to operate outside its design parameters.

Problems That May Affect Emissions

If you are aware of any of the following symptoms, have your engine inspected and repaired by your servicing dealer.

Hard starting or stalling after starting.

Rough idle.

Misfiring or backfiring under load.

Afterburning (backfiring).

Black exhaust smoke or high fuel consumption.

Replacement Parts

The emission control systems on your Honda engine were designed, built, and certified to conform with EPA, California and Canadian emission regulations. We recommend the use of genuine Honda parts whenever you have maintenance done. These original-design replacement parts are manufactured to the same standards as the original parts, so you can be confident of their performance. The use of replacement parts that are not of the original design and quality may impair the effectiveness of your emission control system.

A manufacturer of an aftermarket part assumes the responsibility that the part will not adversely affect emission performance. The manufacturer or rebuilder of the part must certify that use of the part will not result in a failure of the engine to comply with emission regulations.

Maintenance

Follow the maintenance schedule on page 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.

Descriptive Term	Applicable to Emissions Durability Period
Moderate	50 hours [0 80 cm (0 80 cc) inclusive]
	125 hours [greater than 80 cm	(80 cc)]
Intermediate	125 hours [0 80 cm (0 80 cc) inclusive]
	250 hours [greater than 80 cm	(80 cc)]
Extended	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]

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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Specifications

Wiring Diagrams

(PTO shaft type S)

Without Oil Alert

Length × Width ×

225 × 274 × 353 mm

Height

(8.9 × 10.8 × 13.9 in)

Dry mass [weight]

5.5 kg (12.1 lbs)

Engine type

4-stroke, overhead valve, single cylinder

Displacement

49.4 cm

(3.01 cu-in)

[Bore × Stroke]

[41.8 × 36.0 mm (1.65 × 1.42 in)]

Net power

1.6 kW (2.2 PS, 2.1 bhp) at 7,000 rpm

(in accordance with SAE J1349 )

Max. Net torque

2.7 N·m (0.28 kgf·m, 2.0 lbf·ft) at

(in accordance with SAE J1349 )

4,500 rpm

Fuel tank capacity

0.77 (0.203 US gal , 0.169 Imp gal)

Engine oil capacity

0.25 (0.26 US qt , 0.22 Imp qt)

Cooling system

Forced air

Ignition system

Transistor magneto

PTO shaft rotation

Counterclockwise

The power rating of the engine indicated in this document is the

net power output tested on a production engine for the engine

With Oil Alert

model and measured in accordance with SAE J1349 at 7,000

rpm (Net Power) and at 4,500 rpm (Max. Net Torque). Mass

production engines may vary from this value.

Actual power output for the engine installed in the final machine

will vary depending on numerous factors, including the

operating speed of the engine in application, environmental

conditions, maintenance, and other variables.

Tuneup Specifications

ITEM

SPECIFICATION

MAINTENANCE

Spark plug gap

0.60 0.70 mm

Refer to page 9

(0.024 0.028 in)

Idle speed

2,500 ± 200 rpm

See your

Valve clearance

IN: 0.08 ± 0.02 mm

authorized

(cold)

EX: 0.11 ± 0.02 mm

Honda dealer

Other

No other adjustments needed.

specifications

Bl

Black

Br

Brown

(A) OIL LEVEL SWITCH

Quick Reference Information

Y

Yellow

O

Orange

(B) OIL ALERT UNIT

Bu

Blue

Lb

Light blue

(C) ENGINE SWITCH

Fuel

Unleaded gasoline (Refer to page 7)

G

Green

Lg

Light green

(D) IGNITION COIL

U.S.

Pump octane rating 86 or higher

R

Red

P

Pink

(E) SPARK PLUG

Except

Research octane rating 91 or higher

W

White

Gr

Gray

U.S.

Pump octane rating 86 or higher

Engine oil

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

Refer to page 7.

Spark plug

CR5HSB (NGK)

U16FSR-UB (DENSO)

Maintenance

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 7.

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