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o2001-2013 Honda Motor Co., Ltd. -All Rights Reserved

WATER PUMP

WX15

Owner’s Manual

Includes US and Canadian Models

Click to Save As

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Keep this owner’s manual handy so you can refer to This owner’s manual is considered a permanent part and should remain with the water pump if resold.

The information and specifications included in this pu

effect at the time of approval for printing. Honda Moreserves the right, however, to discontinue or changedesign at any time without notice and without incurrwhatever. No part of this publication may be reprodu

itt i i

The engine exhaust from this producontains chemicals known to the Sta

of California to cause cancer, birthdefects or other reproductive harm

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INTRODUCTION

Congratulations on your selection of a Honda water pcertain you will be pleased with your purchase of on

water pumps on the market.

We want to help you get the best results from your nand to operate it safely. This manual contains the infto do that; please read it carefully.

As you read this manual, you will find information prsymbol. That information is intended to help

to your water pump, other property, or the environm

We suggest you read the warranty policy to fully undcoverage and your responsibilities of ownership. Thea separate document that should have been given to If not, you can obtain a copy from your dealer or dowwarranty policy from; U.S.A http://powerequipment.honda.com/support/waCanada http://powerequipment.honda.ca/parts-servic

When your water pump needs scheduled maintenancthat your Honda servicing dealer is specially trained water pumps. Your Honda servicing dealer is dedicatsatisfaction and will be pleased to answer your quest

Best Wishes,

Honda Motor Co., Ltd.

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INTRODUCTION

A FEW WORDS ABOUT SAFETY

Your safety and the safety of others are very importawater pump safely is an important responsibility.

To help you make informed decisions about safety, woperating procedures and other information on labelsmanual. This information alerts you to potential hazayou or others.

Of course, it is not practical or possible to warn you hazards associated with operating or maintaining a wmust use your own good judgment.

You will find important safety information in a varietyincluding:

• Safety Labels — on the pump.

• Safety Messages — preceded by a safety alert symthree signal words, DANGER, WARNING, or CAUTI

These signal words mean:

You WILL be KILLED or SERIOyou don’t follow instructions

You CAN be KILLED or SERIOUdon’t follow instructions.

You CAN be HURT if you don

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CONTENTS

PUMP SAFETY....................................................

IMPORTANT SAFETY INFORMATION .................

SAFETY LABEL LOCATIONS..............................

CONTROLS & FEATURES .....................................

COMPONENT & CONTROL LOCATIONS..............CONTROLS .....................................................

Fuel Valve Lever ...........................................Ignition Switch..............................................Choke Lever .................................................Throttle Lever ...............................................Recoil Starter Grip.........................................

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

Oil Alert System............................................

BEFORE OPERATION ...........................................

ARE YOU READY TO GET STARTED?.................IS YOUR PUMP READY TO GO?.........................

Check the General Condition of the Pump ........

Check the Suction and Discharge Hoses...........Check the Engine ..........................................

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

SAFE OPERATING PRECAUTIONS......................PUMP PLACEMENT ..........................................

SUCTION HOSE INSTALLATION ........................DISCHARGE HOSE INSTALLATION.....................PRIMING THE PUMP.........................................STARTING THE ENGINE....................................SETTING ENGINE SPEED

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CONTENTS

SERVICING YOUR PUMP (continued)

ENGINE OIL CHANGE .......................................ENGINE OIL RECOMMENDATIONS .....................AIR FILTER INSPECTION ...................................AIR FILTER CLEANING......................................SPARK PLUG SERVICE......................................SPARK ARRESTER SERVICE (optional equipment)

STORAGE...........................................................

STORAGE PREPARATION..................................Cleaning.......................................................Fuel.............................................................Engine Oil.....................................................

Engine Cylinder .............................................STORAGE PRECAUTIONS .................................REMOVAL FROM STORAGE ..............................

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

TAKING CARE OF UNEXPECTED PROBLEMS ..........ENGINE...........................................................

Engine Will Not Start .....................................Engine Lacks Power.......................................

PUMP .............................................................No Pump Output ...........................................

Low Pump Output .........................................

TECHNICAL INFORMATION..................................

Serial Number Locations.................................C b t M difi ti f Hi h Altit d O t

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PUMP SAFETY

IMPORTANT SAFETY INFORMATION

Honda WX15 pump is designed to pump only fresh wintended for human consumption, and other uses canthe operator or damage to the pump and other prope

Most injuries or property damage can be prevented iinstructions in this manual and on the pump. The mo

hazards are discussed below, along with the best wayourself and others.

Operator Responsibility

It is the operator’s responsibility to provide the neces

protect people and property. Know how to stop the case of emergency. If you leave the pump for any rethe engine off. Understand the use of all controls an

Be sure that anyone who operates the pump receiveinstruction. Do not let children operate the pump. Ke

pets away from the area of operation.

Pump Operation

Pump only water that is not intended for human conPumping flammable liquids, such as gasoline or fuel o

fire or explosion, causing serious injury. Pumping seaacids, chemical solutions, or any other liquid that procan damage the pump.

Refuel With Care

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PUMP SAFETY

Hot Exhaust

The muffler becomes very hot during operation and while after stopping the engine. Be careful not to touwhile it is hot. Let the engine cool before transportinstoring it indoors.

To prevent fire hazards, keep the pump at least 3 fe

from building walls and other equipment during operaflammable objects close to the engine.

Carbon Monoxide Hazard

Exhaust contains poisonous carbon monoxide, a colo

gas. Breathing carbon monoxide can cause loss of cmay lead to death.

If you run the pump in an area that is confined, or evethe air you breathe could contain a dangerous amou

Never run the engine inside a closed garage, house,

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P

SAFETY LABEL LOCATIONS

The labels shown here contain important safety inforead them carefully. These labels are considered peryour pump. If a label comes off or becomes hard to authorized Honda servicing dealer for a replacement

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CONTROLS & FEATURES

COMPONENT & CONTROL LOCATIONS

PUMP DRAIN PLUG

SUCTION PORT

DISCHARGE PORT

PRIMING WATERFILLER CAP

CARRYING HANDLE

OIL DRAI

SPARK PLUGFUEL VALVE LEVER

THROTTLELEVER

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CONTROLS

CONTROLS

Fuel Valve Lever

The fuel valve opens and closesthe connection between the fueltank and the carburetor.

The fuel valve lever must be in theON position for the engine to run.

When the engine is not in use,leave the fuel valve lever in theOFF position to prevent carburetor

flooding and to reduce thepossibility of fuel leakage.

Ignition Switch

The ignition switch controls the

ignition system.

The ignition switch must be in theON position for the engine to run.

Turning the ignition switch to the

OFF position stops the engine.

Choke Lever

The choke lever opens and closes

FUEL

IGNITIONSWITCH

CHOKE LEV

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CONTROLS & FEATURES

Throttle Lever

The throttle lever controls enginespeed.

Moving the throttle lever in thedirections shown makes theengine run faster or slower.

Pump output is controlled byadjusting the throttle lever. Atmaximum throttle position, thepump will deliver the highestoutput volume. Moving thethrottle lever toward the idleposition will decrease the outputvolume of the pump.

Recoil Starter Grip

Pulling the starter grip operates the recoil starter to crstarting.

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CONTROLS

FEATURES

Oil Alert® System

The Oil Alert system is designed to prevent engine dan insufficient amount of oil in the crankcase. Beforecrankcase can fall below a safe limit, the Oil Alert syautomatically stop the engine (the ignition switch wi

position).

If the engine stops and will not restart, check the eng29) before troubleshooting in other areas.

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BEFORE OPERATION

ARE YOU READY TO GET STARTED?

Your safety is your responsibility. A little time spent significantly reduce your risk of injury.

Knowledge

Read and understand this manual. Know what the co

to operate them.

Familiarize yourself with the pump and its operation pumping. Know what to do in case of emergencies.

Be sure of what you are pumping. This pump is desig

fresh water that is not intended for human consumpIS YOUR PUMP READY TO GO?

For your safety, and to maximize the service life of yis very important to take a few moments before you

to check its condition. Be sure to take care of any prhave your servicing dealer correct it, before you ope

Improperly maintaining this pump, o

failing to correct a problem beforeoperation, could cause a malfunctioin which you could be seriouslyinjured.

E ORE

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BEFORE

Check the General Condition of the Pump

• Before each use, look around and underneath the eoil or gasoline leaks.

• Remove any excessive dirt or debris, especially aromuffler, and recoil starter.

• Look for signs of damage.

• Check that all nuts, bolts, screws, hose connectortightened.

Check the Suction and Discharge Hoses

• Check the general condition of the hoses. Be sure serviceable condition before connecting them to thRemember that the suction hose must be reinforceprevent hose collapse.

• Check that the sealing washer in the suction hose good condition (see page 16).

• Check that the hose connectors and clamps are se(see pages 16 and 17).

• Check that the strainer is in good condition and is suction hose (see page 16).

Check the Engine

OPERATION

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OPERATION

SAFE OPERATING PRECAUTIONS

To safely realize the full potential of this pump, you understanding of its operation and a certain amount ocontrols.

Before operating the pump for the first time, please IMPORTANT SAFETY INFORMATION on page 5 and

BEFORE OPERATION .

For your safety, avoid starting or operating the enginarea, such as a garage. Your engine’s exhaust contacarbon monoxide gas which can collect rapidly in an cause illness or death.

Pump only fresh water that is not intended for humaPumping flammable liquids, such as gasoline or fuel ofire or explosion causing serious injury Pumping sea

Exhaust contains poisonous carbonmonoxide gas that can build up todangerous levels in closed areas.

Breathing carbon monoxide cancause unconsciousness or death.

Never run the engine in a closed, oeven partly closed area wherepeople may be present.

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PUMP PLACEMENT

For best pump performance, place the pump near thuse hoses that are no longer than necessary. That wito produce the greatest output with the least self-pr

As head (pumping height) increases, pump output delength, type, and size of the suction and discharge h

significantly affect pump output.

Discharge head capability is always greater than succapability, so it is important for suction head to be ttotal head. The maximum available suction head will operating conditions. However, the suction head can

feet (8 meters) and should always be kept as low as

Minimizing suction head (placing the pump near the wvery important for reducing self-priming time. Self-prtime it takes the pump to bring water the distance oduring initial operation.

DISCHARGEHEAD

SUCTION

OPERATION

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OPERATION

SUCTION HOSE INSTALLATION

Use a commercially available 1.5 inch diameter hoseconnector with the hose clamp provided with the puMost hoses come with the connectors already instalhose must be reinforced with a noncollapsible wall oconstruction and cannot contain any perforations.

The suction hose should be no longer than necessaryperformance is best when the pump is near the watehoses are short.

Use a hose clamp to securely fasten the hose connechose in order to prevent air leakage and loss of sucti

hose connector sealing washer is in good condition.

Install the strainer (provided with the pump) on the osuction hose, and secure it with a hose clamp. The sprevent the pump from becoming clogged or damageNever operate the pump without the strainer installe

Securely tighten the hose connector on the pump su

SEALING WASHER

HOSE COUPLER

HOSE CLAMP

HOSE

S

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DISCHARGE HOSE INSTALLATION

Use a commercially available hoseand hose connector and clampprovided with the pump (ifnecessary).

It is best to use a short,

large-diameter hose, because thatwill reduce fluid friction andimprove pump output. A long orsmall-diameter hose will increasefluid friction and reduce pumpoutput.

Tighten the hose clamp securely to prevent the dischdisconnecting under high pressure.

PRIMING THE PUMP

Before starting the engine, remove the filler cap fromchamber, and completely fill the pump chamber withthe filler cap, and tighten it securely.

Operating the pump dry will destroy the pump seal.

been operated dry, stop the engine immediately, and

cool before priming.

HOSECLAMP

DISCHARGE HOSE

PUMP CHAMBER FILLER CAP

OPERATION

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OPERATION

If the discharge hose must run across a roadway, the the roadway perpendicular to traffic flow. Also, heavy

placed next to the hose so the motor vehicle weight the discharge as vehicles cross over the hose.

Driving over a discharge hose while the pump is runnpossibly when the pump is stopped, may cause pum

BOARDS

DISCHARGE HOSE

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STARTING THE ENGINE

1.Move the fuel valve lever to the ON position.

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

To restart a warm engine, leave the choke lever inposition.

FUEL VALVE LEVER

ON

CHOKE LEVER

CLOSED

OPERATION

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OPERATION

4.Turn the ignition switch to the ON position.

5.Hold the carrying handle securely and pull the startyou feel resistance, and then pull briskly in the direas shown below. Do not allow the recoil starter grip to snap back agReturn it gently to prevent damage to the starter.

IGNITION SWITCH

ON

CARRYING HANDLE

STARTER

Direction to pull

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6.If the choke lever was moved to the CLOSED posiengine, gradually move it to the OPEN position as

up.

SETTING ENGINE SPEED

After starting the engine, move the throttle lever to

for self-priming, and check pump output.Pump output is controlled by adjusting engine speedthrottle lever in the FAST direction will increase pummoving the throttle lever in the SLOW direction will output.

Do not pull the governor linkage to increase engine s

design parameters.

CHOKE LEVER

OPEN

OPERATION

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OPERATION

STOPPING THE ENGINE

To stop the engine in an emergency, simply turn thethe OFF position. Under normal conditions, use the fprocedure.

1.Move the throttle lever to the SLOW position.

2.Turn the ignition switch to the OFF position.

THR

SLOW

OFF

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

After use, remove the pump drain plug (see page 40

pump chamber. Remove the filler cap, and flush the with clean, fresh water. Allow the water to drain frochamber, and then reinstall the filler cap and drain p

FUEL VALVE LEVER

OFF

SERVICING YOUR PUMP

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SERVICING YOUR PUMP

THE IMPORTANCE OF MAINTENANCE

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

To help you properly care for your pump, the followimaintenance schedule, routine inspection procedures

maintenance procedures using basic hand tools. Oththat are more difficult, or require special tools, are bprofessionals and are normally performed by a Hondother qualified mechanic.

The maintenance schedule applies to normal operatin

you operate your pump under severe conditions, suchigh-load or high-temperature operation, or use in undusty conditions, consult your servicing dealer for reapplicable to your individual needs and use.

Improperly maintaining this pump, o

failure to correct a problem beforeoperation, can cause a malfunctionin which you can be seriously hurt okilled.

Always follow the inspection and

maintenance recommendations andschedules in this owner’s manual.

SERVICING

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MAINTENANCE SAFETY

Some of the most important safety precautions follocannot warn you of every conceivable hazard that cperforming maintenance. Only you can decide whethshould perform a given task.

Safety Precautions

• Make sure the engine is off before you begin any mrepairs. This will eliminate several potential hazard

– Carbon monoxide poisoning from engine exhaus

Operate outside away from open windows or do

– Burns from hot parts.Let the engine and exhaust system cool before t

– Injury from moving parts.

Do not run the engine unless instructed to do so

Failure to properly followmaintenance instructions andprecautions can cause you to beseriously hurt or killed.

Always follow the procedures andprecautions in the owner’s manual.

SERVICING YOUR PUMP

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MAINTENANCE SCHEDULE

(1) For commercial use, log hours of operation to determmaintenance intervals.

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

(3) Change engine oil every 25 hours when used under h

ambient temperature.

(4) These items should be serviced by your servicing deathe proper tools and are mechanically proficient. Refemanual for service procedures. See “Honda Publicati

Eachuse

Firstmonth

or10 Hrs.

Every3

monthsor

25 Hrs.

Every6

monthsor

50 Hrs.

Engine oil Check level oChange o o (3)

Air filter Check oClean o (2)Spark plug Check-Adjust

ReplaceSpark arrester(optional parts)

Clean

Fuel tank and filter CleanIdle speed Check-AdjustValve clearance Check-AdjustCombustion chamber Clean After every 300 Hrs

Fuel tubes Check Every 2 years (Replace if ne

Impeller CheckImpeller clearance CheckPump inlet valve Check

REGULAR SERVICE PERIOD (1)ITEMPerform at every indicated monthor operating hour interval,whichever comes first.

SERVICING

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REFUELING

With the engine stopped, remove the fuel tank cap alevel.

If the fuel level is low, refuel in a well-ventilated areastopped. If the engine has been running, allow it to crefuel the engine inside a building where gasoline fu

flames or sparks. Do not fill above the fuel level mar

Gasoline is highly flammable andexplosive.

You can be burned or seriouslyinjured when handling fuel.

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

• Handle fuel only outdoors.• Wipe up spills immediately.

FUEL TANK CAPFUEL LEVEL MARK (MAXIMUM FUEL LEV

SERVICING YOUR PUMP

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Spilled fuel is not only a fire hazard, it causes enviroWipe up spills immediately.

Fuel can damage paint and plastic. Be careful not to

filling your fuel tank. Damage caused by spilled fuel

under the Distributor’s Limited Warranty.

FUEL RECOMMENDATIONS

This engine is certified to operate on unleaded gasoloctane rating of 86 or higher.

You may use regular unleaded gasoline containing no

ethanol (E10) or 5% methanol by volume. In additioncontain cosolvents and corrosion inhibitors.

Use of fuels with content of ethanol or methanol greabove may cause starting and/or performance probledamage metal, rubber, and plastic parts of the fuel s

Engine damage or performance problems that result with percentages of ethanol or methanol greater thannot covered under warranty.

If your equipment will be used on an infrequent or in

please refer to the fuel section of the STORAGE chafor additional information regarding fuel deterioration

Never use stale or contaminated gasoline or an oil/gaA id tti di t t i th f l t k

SERVICING

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ENGINE OIL LEVEL CHECK

Check the engine oil level before each use, or every operated continuously.

Check the engine oil level with the engine stopped aposition.

1.Remove the oil filler cap.2.Check the oil level. If it is below the upper limit, fi

recommended oil to the upper limit (see page 32).

3.Reinstall the oil filler cap.

The Oil Alert system will automatically stop the engilevel falls below safe limits. However, to avoid the inunexpected shutdown, check the oil level regularly.

OIL FILLEROIL FILLER CAP

UPPER LIMIT

SERVICING YOUR PUMP

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ENGINE OIL CHANGE

Drain the used oil while the engine is warm. Warm oand completely.

1.Place a suitable container below the engine to catcthen remove the oil filler cap.

2.Remove the oil drain plug and sealing washer and drain completely.

3.Reinstall the oil drain plug and a new sealing washplug securely.

Improper disposal of engine oil can be harmful to the

If you change your own oil, please dispose of the use

it in a sealed container, and take it to a recycling cen

it in a trash bin, dump it on the ground, or pour it do

OIL FILLER CAP

OIL DRAIN PLUG

SEALING WASHER

SERVICING

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4.With the engine in a level position, fill with the recthe upper limit of the oil filler neck (see page 32).

Add the engine oil slowly and do not let it overflowtank capacity is small.

Engine oil capacity: 8 oz (0.25 L)

5.Reinstall the oil filler cap securely.

OIL FILLER CAP

UPPER LIMIT

SERVICING YOUR PUMP

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ENGINE OIL RECOMMENDATIONS

Oil is a major factor affecting performance and servi4-stroke automotive detergent oil.

Use 4-stroke motor oil that meets or exceeds the reqservice category SJ or later (or equivalent). Always service label on the oil container to be sure it include

later (or equivalent).

SAE 10W-30 is recommended for general use. Otherin the chart may be used when the average temperatwithin the recommended range.

AMBIENT TEMPERATURE

SERVICING

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AIR FILTER INSPECTION

Unhook the two latch tabs on the top of the air cleatop of the air cleaner cover back and unhook the twremove the cover. Check the air filter to be sure it iscondition.

If the air filter is dirty, clean it as described on page 3

filter if it is damaged.

Reinstall the air filter and air cleaner cover.

Operating the engine without an air filter, or with a d

will allow dirt to enter the engine, causing rapid enginof damage is not covered by the Distributor’s Limite

AIR CLELATCH TABS

AIR

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SERVICING

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SPARK PLUG SERVICE

In order to service the spark plug, you will need a sp(commercially available).

Recommended spark plug: CR5HSB (NGK) U16FSR-UB (DENSO)

Incorrect spark plugs can cause engine damage.

For good performance, the spark plug must be properof deposits.

Allow the engine to cool before servicing the spark p1.Disconnect the spark plug cap, and remove any di

spark plug area.

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

SPARK PLUG CAP

SPARK PLUG

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SERVICING

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SPARK ARRESTER SERVICE (optional parts)

Your engine is not factory-equipped with a spark arrareas, it is illegal to operate an engine without a spalocal laws and regulations. A spark arrester is availabHonda servicing dealers.

The spark arrester must be serviced every 100 hours

functioning as designed.

If the engine has been running, the muffler will be vemuffler to cool before servicing the spark arrester.

1.Remove the muffler protector by removing the thr

2.Remove the spark arrester from the muffler by rem

MUFFLERSCREW

SPARK ARRESTER

SERVICING YOUR PUMP

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3.Use a brush to remove carbon deposits from the sscreen. Be careful to avoid damaging the screen.

The spark arrester must be free of breaks and holespark arrester if it is damaged.

4.Install the spark arrester and the muffler protectororder of disassembly.

SPARK ARRESTER SCREEN

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STORAGE

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4.Stop the engine, and allow it to cool.

5.Remove the pump drain plug, and flush the pump water. Allow the water to drain from the pump chreinstall the drain plug.

6.After the pump is clean and dry, touch up any damcoat areas that may rust with a light film of oil. Lu

with a silicone spray lubricant.

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Fuel

Depending on the region where you operate your equ

formulations may deteriorate and oxidize rapidly. Fue

oxidation can occur in as little as 30 days and may c

the carburetor and/or fuel system. Please check with

dealer for local storage requirements.

Gasoline will oxidize and deteriorate in storage. Old ghard starting, and it leaves gum deposits that clog ththe gasoline in your engine deteriorates during storagto have the carburetor and other fuel system comporeplaced.

The length of time that gasoline can be left in your fcarburetor without causing functional problems will vfactors as gasoline blend, your storage temperaturesfuel tank is partially or completely filled. The air in a

tank promotes fuel deterioration. Very warm storageaccelerate fuel deterioration. Fuel deterioration problwithin a few months, or even less if the gasoline wayou filled the fuel tank.

The Distributor’s Limited Warranty does not cover fu

or engine performance problems resulting from neglepreparation.

You can extend fuel storage life by adding a fuel staf l t d f th t id f l d

STORAGE

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Adding a Fuel Stabilizer to Extend Fuel Storage Life

Short Term Storage (30-90 days)

If your equipment will not be used for 30-90 days, wfollowing to prevent fuel-related problems.

1.Add fuel stabilizer following the manufacturer’s in

When adding a fuel stabilizer, fill the fuel tank withonly partially filled, air in the tank will promote fueduring storage. If you keep a container of gasoline sure that it contains only fresh gasoline.

If it takes more than 3 months to use the fuel in yo

container, we suggest adding a fuel stabilizer to thfull the container.

2.After adding a fuel stabilizer, run the engine outdoto be sure that treated gasoline has replaced the uin the carburetor.

Dry operation will damage the pump seal. Be sure t

is filled with water before starting the engine.

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

4.Remove the pump drain plug, and allow the waterpump chamber. Reinstall the drain plug.

FUEL VALVE LEVER

fill

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Long Term or Seasonal Storage (greater than 90 day

Draining the Fuel Tank and Carburetor 1.Remove the fuel tank cap, and empty the fuel tank

gasoline container using a commercially available hDo not use an electric pump.

2.Move the fuel valve lever to the ON position and lcarburetor drain bolt by turning 1 to 2 turns countthe pump slightly to allow draining fuel to clear th

3.After all fuel has drained, tighten the carburetor dmove the fuel valve lever to the OFF position and tank cap securely.

Gasoline is highly flammable andexplosive.

You can be burned or seriouslyinjured when handling fuel.

• Keep heat, sparks, and flameaway.

• Handle fuel only outdoors.• Wipe up spills immediately.

STORAGE

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Engine Oil

1.Change the engine oil (see page 30).Engine Cylinder

1.Remove the spark plug (see page 35).

2.Pour a teaspoon (5 cc) of clean engine oil into the

3.Pull the starter grip several times to distribute the

4.Reinstall the spark plug.

5.Pull the starter grip slowly until resistance is felt athe flywheel fin aligns with the mark on the fan covthe valves, so moisture cannot enter the engine cystarter grip gently.

STORAGE PRECAUTIONS

Align the not

with the mark

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Place the pump on a level surface. Tilting can cause

With the engine and exhaust system cool, cover the dust. A hot engine and exhaust system can ignite ormaterials. Do not use sheet plastic as a dust cover. Awill trap moisture around the pump, promoting rust a

REMOVAL FROM STORAGE

Check your pump as described in the BEFORE OPERAthis manual.

If the fuel was drained during storage preparation, fifresh gasoline. If you keep a container of gasoline for

that it contains only fresh gasoline. Gasoline oxidizeover time, causing hard starting.

If the cylinder was coated with oil during storage preengine may smoke briefly at startup. This is normal.

TRANSPORTING

If th h b i ll th i t

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If the pump has been running, allow the engine to cominutes before loading the pump on the transport ve

and exhaust system can burn you and can ignite somKeep the pump level when transporting to reduce theleakage. Move the fuel valve lever to the OFF positio

TAKING CARE OF UNEXPECTED

ENGINE

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ENGINE

Engine Will Not Start

Engine Lacks Power

Possible Cause Correctio

Fuel valve OFF. Move fuel valve lever to ON po

Choke open. Move choke lever to CLOSED pis warm.

Ignition switch OFF. Turn ignition switch to ON.

Out of fuel. Refuel (p. 27)Bad fuel; pump stored withouttreating or draining gasoline, orrefueled with bad gasoline.

Drain fuel tank and carburetor Refuel with fresh gasoline (p. 2

Low oil level caused Oil Alert®to stop engine.

Add oil (p. 29).

Spark plug faulty, fouled, orimproperly gapped.

Clean, gap, or replace spark pl

Spark plug wet with fuel(flooded engine).

Dry and reinstall spark plug. Stthrottle lever in FAST position.

Fuel filter clogged, carburetormalfunction, ignition

malfunction, valves stuck, etc.

Take engine to an authorized Hor refer to shop manual.


Air filter element clogged. Clean or replace air filter eleme

Bad fuel; pump stored withouttreating or draining gasoline, orrefueled with bad gasoline.

Drain fuel tank and carburetor Refuel with fresh gasoline (p. 2

Throttle lever in slow position. Move throttle lever to the FAST

Fuel filter clogged carburetor Take engine to an authorized H

TAKING CARE OF UNEXPECTED PROB

PUMP

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PUMP

No Pump Output

Low Pump Output


Pump not primed. Prime pump (p. 17)

Suction hose collapsed, cut, orpunctured.

Replace suction hose (p. 16).

Strainer not completely

underwater.

Sink the strainer and the end o

completely underwater.Air leak at connector. Replace sealing washer if miss

Tighten hose connector and cla

Strainer clogged. Clean debris from strainer.

Excessive head. Relocate pump and/or hoses to

Engine lacks power. See page 47.


Suction hose collapsed,damaged, too long, or diameter

too small.

Replace suction hose (p. 16).

Air leak at connector. Replace sealing washer if missTighten hose connector and cla

Strainer clogged. Clean debris from strainer.

Discharge hose damaged, too

long, or diameter too small.

Replace discharge hose (p. 17)

Excessive head. Relocate pump and/or hoses to

Engine lacks power. See page 47.

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TECHNICAL INFORMATION

Carburetor Modification for High Altitude Operation

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Carburetor Modification for High Altitude Operation

At high altitude, the standard carburetor air-fuel mixrich. Performance will decrease, and fuel consumptiovery rich mixture will also foul the spark plug and caOperation at an altitude that differs from that at whiccertified, for extended periods of time, may increase

High altitude performance can be improved by specifthe carburetor. If you always operate your pump at a5,000 feet (1,500 meters), have your servicing dealcarburetor modification. This engine, when operatedwith the carburetor modifications for high altitude usemission standard throughout its useful life.

Even with carburetor modification, engine horsepowabout 3.5% for each 1,000-foot (300-meter) increaseffect of altitude on horsepower will be greater thancarburetor modification is made.

When the carburetor has been modified for high altit

air-fuel mixture will be too lean for low altitude use.

altitudes below 5,000 feet (1,500 meters) with a m

may cause the engine to overheat and result in seriou

For use at low altitudes, have your servicing dealer r

carburetor to original factory specifications.

TECHNICAL IN

Emission Control System Information

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Emission Control System Information

Source of Emissions

The combustion process produces carbon monoxidenitrogen, and hydrocarbons. Control of hydrocarbonsnitrogen is very important because, under certain conto form photochemical smog when subjected to sun

monoxide does not react in the same way, but it is tHonda utilizes appropriate air/fuel ratios and other emsystems to reduce the emissions of carbon monoxidnitrogen, and hydrocarbons. Additionally, Honda fuel systems utilize components

technologies to reduce evaporative emissions.

The U.S. and California Clean Air Acts, and Canadia

Protection Act

U.S. EPA, California and Canadian regulations require

to furnish written instructions describing the operatimaintenance of emission control systems.

The following instructions and procedures must be fokeep the Honda engine emissions within the emissio

Tampering and Altering

Tampering is a violation of Federal and California law


Problems That May Affect Emissions

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Problems That May Affect Emissions

If you are aware of any of the following symptoms, 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 new Honda endesigned, built, and certified to conform with U.S. ECanadian emission regulations. We recommend the uGenuine parts whenever you have maintenance done

design replacement parts are manufactured to the sathe original parts, so you can be confident of their puse of replacement parts that are not of the original may impair the effectiveness of your emission contro

A manufacturer of an aftermarket part assumes the

the part will not adversely affect emission performanmanufacturer or rebuilder of the part must certify thwill not result in a failure of the engine to comply wiregulations

TECHNICAL IN

Air Index

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de

An Air Index Information hang tag/label is applied toto an emission durability time period in accordance wrequirements of the California Air Resources Board.

The bar graph is intended to provide you, our customcompare the emissions performance of available engi

Air Index, the less pollution.The durability description is intended to provide you relating the engine’s emission durability period. The indicates the useful life period for the engine’s emisssystem. See your Emission Control System Warranty

information.

Descriptive Term Applicable to Emission Dur

Moderate 50 hours (0–80 cc, incl125 hours (greater than 8

Intermediate 125 hours (0–80 cc, incl250 hours (greater than 8

Extended 300 hours (0–80 cc, incl500 hours (greater than 8

1000 hours (225 cc and g


Specifications

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p

Dimensions and weight

Engine design and performance

Tune up

Pump

Length 12.8 in (325 mWidth 10.8 in (275 mHeight With rubber feet: 14.8Dry mass [weight] 20 lbs (9 kg

Model GXH50TEngine type 4-stroke, overhead valve,Displacement

[bore×stroke]3.0 cu-in (49.4

[1.65×1.42 in (41.8×Engine oil capacity 8 oz (0.25 L

Fuel tank capacity 0.203 US gal (0Cooling system Forced airIgnition system Transistor magPTO shaft rotation Counterclockw

Spark plug gap 0.024–0.028 in

(0.60–0.70 mm)See

Idle speed 2,500±200 rpmValve clearance (cold)

Intake: 0.08±0.02 mm

Exhaust:

0.11±0.02 mm

See s

Other specifications No other adjustments needed.

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QUICK REFERENCE INFORMATI

Fuel Type Unleaded gasolin

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yp gethanol content

10% and a pump86 or higher (seeEngine Oil Type SAE 10W-30, AP

equivalent), for gpage 32)

Spark PlugType NGK: CR5HSB

DENSO: U16FSRGap 0.024–0.028 in

(see page 35)

Maintenance

Before eachuse

Check engine oilCheck air filter

First10 hours

Change engine o

Subsequent Refer to the MASCHEDULE on p

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00X31YF26100

Documents

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