Honda Automobiles WMP20X User Manual
This owner’s manual is considered a permanent part of the
pump. It must be available to all operators of the pump and
should remain with the pump if resold.
The information and specifications in this publication are
based on the latest product information available at the time
of printing. American Honda Motor Co., Inc. 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.
It is illegal in some areas to operate an engine without a
U.S.D.A. qualified spark arrester; check local laws and
regulations. An optional spark arrester for this pump is
available from your authorized Honda water pump dealer.
@American Honda Motor Co., Inc.
I
Congratulations on your selection of the Honda WMP20X
multi-purpose pump. We are certain you will be pleased with
your purchase.
You can enhance the perfomance of your new pump by
taking time to study this manual. In it you’ll learn how to use
it safely and efficiently. The service interval and maintenance
recommendations in this manual were developed to provide
you with the optimum performance and service from your
pump. We suggest you follow them.
When your pump needs scheduled maintenance, keep in
mind that your Honda water pump dealer is specially trained
in servicing Honda pumps and is supported by the parts and
service divisions of American Honda. Your Honda dealer is
dedicated to your satisfaction and will be pleased to answer
your questions and concerns.
Please take the time to read the warranty policy to fully
understand its coverage and your responsibilities of
ownership. The warranty policy is a separate document that
should have been given to you by your dealer.
When you contact your Honda water pump dealer about
your multi-purpose pump, they will need to know the engine
and frame serial numbers. Write those numbers in the space
below for future reference (see page 6 for engine and frame
serial number location).
Best wishes,
Power Equipment Division
American Honda Motor Co., Inc.
Engine serial number
Frame serial number
II
Safety Messages
Your safety and the safety of others is very important. We
have provided important safety messages in this manual and
on the pump. 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 A and one of three words: DANGER,
WARNING, or CAUTION.
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:
pEiEq
The purpose of these messages is to help prevent damage
to your pump, other property, or the environment.
Your pump or other property could be
damaged if you don’t follow instructions.
Ill
CONTENTS
Turn to the beginning of each section for a complete list
of subjects.
WATER PUMP SAFETY 1
Important information about some specific hazards,
and what you can do to prevent injury.
CONTROLS
lden tifica tion of components and information about
how the controls work.
PRE-OPERATION CHECK
How to fuel and check your pump to be sure it is
ready.
OPERATION
Preparing the pump, starting and stopping the
engine, and pumping tips.
MAINTENANCE
When and how to perform routine inspections and
service to keep your pump in good condition.
TRANSPORTING/STORAGE
How to safe/y transport and store your pump.
TROUBLESHOOTING
How to troubleshoot the engine if it won’t start or
when the pump will not perform properly.
SPECIFICATIONS
This section provides you with dimensions,
capacities, and other technical information.
5
9
17
25
35
41
45
ADDITIONAL INFORMATION
This section gives you sources for more information
about your pump.
INDEX
IV
49
53
PUMP SAFETY
This section explains what you need to know to operate
your multi-purpose pump safely.
Safety Information
Safety Label Locations
2
4
1
PUMP SAFETY
SAFETY INFORMATION
Your Honda multi-purpose pump is designed to give safe
and dependable service if operated according to instructions.
Read and understand this owner’s manual before operating
your pump. You can help prevent accidents by being familiar
with your pump’s controls, and by observing safe operating
procedures
Operator Responsibility
Know how to stop the pump quickly in case of emergency.
Understand the use of all controls and connections.
Be sure that anyone who operates the pump receives proper
instruction. Do not let children operate the pump without
parental supervision. Keep pets away from the area of
operation.
Pump Operation
Never pump flammable liquids such as gasoline or fuel oils.
An explosion may result causing serious injury.
Pump only those chemicals listed on pages 20 and 21 of
this manual.
Operate the pump on level surface. If the engine is tilted, fuel
may spill.
Prime the pump before operation. Operating the pump dry
will cause seal damage.
Do not enclose the pump in any structure.
The exhaust system gets hot enough to ignite some
materials. Keep the pump at least 1 meter (3 feet) away from
buildings and other equipment during operation.
Carbon Monoxide Hazards
Exhaust contains poisonous carbon monoxide, a colorless
and odorless gas. Breathing exhaust can cause loss of
consciousness and may lead to death.
If you run the pump in an area that is confined, or even
partially enclosed, the air you breathe could contain
dangerous amounts of exhaust gas. To keep exhaust gas
from building up, provide adequate ventilation.
2
PUMP SAFETY
REFUEL WITH CARE
Gasoline is extremely flammable and gasoline vapor can
explode. Refuel only outdoors, in a well-ventilated area with
the engine stopped. Never smoke near gasoline, and keep
other flames and sparks away. Always store gasoline in an
approved container.
3
PUMP SAFETY
SAFETY LABEL LOCATIONS
The labels shown here contain important safety information.
Please read them carefully. These labels are considered
permanent parts of your multi-purpose pump, so if a label
comes off or becomes hard to read, contact your authorized
Honda water pump dealer for a replacement.
CONTROLS
This section shows you where controls are located and
tells you what they do and how they work.
CONTROLS
Component Identification
Controls
Throttle lever
Choke lever
Fuel valve
Ignition switch
Oil Alert system
Recoil starter
................. 7
..................
...................
................. 8
................ 8
................. 8
6
7
7
7
5
CONTROLS
Component Identification
This identifies components and where to find the most
frequently used controls.
FUEL FILLER CAP
FUEL VALVE
STARTER GRIP
rnlMINQ WA I Cll
DISCHARGE
POR~~~~~~LEANER
1
/-
IGNITIOiiWITCH
- ENGINE SERIAL NUMBER
FRAME
SERIAL
NUMBER
OIL DRAIN PLUG
CAP/DIPSTICK
6
Controls
You will use these controls every time you operate your
multi-purpose pump.
Throttle Lever
The throttle lever controls
the engine speed. Moving
the throttle fully to the left
gives maximum engine
speed. Moving the throttle
lever fully to the right returns
the engine to idle speed.
THRO’ITLE LEVER
CONTROLS
I
The pump output can be
THROlTLE
controlled by adjusting the
throttle lever to the desired
position. At maximum throttle position, the pump will deliver
the highest output volume. Moving the throttle toward the
idle position will decrease the output volume of the pump.
Choke Lever
The choke is used to provide
an enriched mixture when
starting a cold engine. Move
the choke to the CLOSED
position when starting the
engine cold. If the engine is
warm, leave the choke in the
OPEN position.
CHoK: LEVER
CLOSED
Fuel Valve
The fuel valve is used to
stop flow of fuel from the
fuel tank to the carburetor.
The fuel valve must be in
the ON position to start and
operate the engine. Turn the
fuel valve to the OFF
position when the pump is
not in use.
OFF
FUEL VALVE
’
7
CONTROLS
Ignition Switch
The ignition switch allows the operator to start and stop the
engine.
Switch positions;
OFF: To stop the engine.
ON: To start and run the engine.
Oil
Alert System
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 shut down the
engine (the ignition switch
will remain in the ON
position).
If the Oil Alert system shuts the engine down, the engine will
not run. If this occurs, add engine oil (p. 10).
Recoil Starter
To start the engine, pull the starter grip lightly until resistance
is felt, then pull briskly.
piGiq
Do not allow the starter to
snap back against the
engine. Return the starter
grip gently to prevent
damage to the starter.
RECOIL STARTER GRIP
8
PRE-OPERATION CHECKS
PRE-OPERATION CHECKS
This section shows you how to check and prepare your
pump for operation.
Engine oil
Fuel
Refueling . . . . . . . . . . . . . . . . . . . . . 12
Fuel recommendations . . . . . . . . . . . . . . 73
Oxygenated fuels . . . . . . . . . . . . . . . . . 14
Air cleaner
High elevation operation
10
12
15
16
9
PRE-OPERATION CHECKS
Engine oil
Check the oil level with the pump on a level surface and the
engine stopped.
Use Honda 4-stroke oil, or an equivalent high detergent,
premium quality motor oil certified to meet or exceed U.S.
automobile manufacturer’s requirements for Service
Classification SG, SF/CC, CD. Motor oils classified SG,
SF/CC, CD will show this designation on the container.
SAE low-30 is
recommended for
general, all-temperature
use. Other viscosities
shown in the chart may
be used when the
average temperature in
your area is within the
indicated range.
1. Remove the oil filler cap
and wipe the dipstick clean.
2. Check the oil level by inserting the dipstick into the filler neck
without screwing it in.
SAE
3. If the level is low, add the recommended oil to the top of the
oil filler neck. Over filling with oil can cause the engine to
smoke after start-up.
piE?iEq
Running the engine with insufficient oil can cause serious
engine damage.
TOP OF OIL
OIL FILLER CAP
10
PRE-OPERATION CHECKS
Fuel
Fuel tank capacity: 3.6 I(0.95 US gal)
Pump octane rating: Use unleaded gasoline 86 or higher
Refueling
Refuel in a well ventillated area with the engine stopped.
Gasoline is extremely flammable and is explosive and
you can be burned or seriously injured when refueling.
l Stop the engine and keep heat, sparks, and flames
away.
l Refuel only outdoors.
l Wipe up spills immediately.
1. Remove the filler cap and check the fuel level.
2. Refill the tank if the fuel level is low (see p.12 for fuel
recommendations). Do not fill above the shoulder of the fuel
filler neck.
3. After refueling, make sure the tank filler cap is closed
properly and securely.
11
PRE-OPERATION CHECKS
Fuel Recommendation
We recommend unleaded gasoline because it produces
fewer engine and spark plug deposits and extends exhaust
system life.
Never use stale or contaminated gasoline or oil/gasoline
mixture. Avoid getting dirt or water in the fuel tank.
Occasionally you may hear light “spark knock” or “pinging”
(metallic rapping noise) while operating under heavy loads.
This is no cause for concern.
If spark knock or pinging occurs at a steady engine speed,
under normal load, change brands of gasoline. If spark
knock or pinging persists, see an authorized Honda water
pump dealer.
p?Eiq
Running the engine with persistent spark knock or pinging
can cause engine damage.
Running the engine with persistent spark knock or pinging is
misuse, and the Distributor’s Limited Warranty does not
cover parts damaged by misuse.
12
PRE-OPERATION CHECKS
Oxygenated Fuels
Some gasolines are blended with alcohol or an ether
compound. These gasolines are collectively referred to as
oxygenated fuels. To meet clean air standards, some areas
of the United States and Canada use oxygenated fuels to
help.
If you use an oxygenated fuel, be sure its pump octane
rating is 86 or higher.
Before using an oxygenated fuel, try to confirm the fuel’s
contents. Some states/provinces require this information to
be posted on the pump.
The following are the EPA approved percentages of
oxygenates:
l Ethanol (ethyl or grain alcohol) 10% by Volume
You may use gasoline containing up to 10% ethanol by
volume. Gasoline containing ethanol may be marketed
under the name “Gasohol”.
l MTBE (methyl tertiary butyl ether) 15% by Volume
You may use gasoline containing up to 15% MTBE by
volume.
l Methanol (methyl or wood alcohol) 5% by Volume
You may use gasoline containing up to 5% methanol by
volume as long as it contains cosolvents and corrosion
inhibitors to protect the fuel system. Gasoline containing
more than 5% methanol by volume may cause starting
and/or performance problems. It may also damage
metal, rubber and plastic parts of your fuel system.
If you notice any undesirable operating symptoms, try
another service station or switch to another brand of
gasoline.
Fuel system damage or performance problems resulting
from the use of an oxygenated fuel containing more than the
percentages of oxygenates mentioned are not covered
under warranty.
13
PRE-OPERATION CHECKS
Air cleaner
A dirty air cleaner will restrict the air flow to the carburetor
causing carburetor malfunction. Inspect the air cleaner
regularly.
1. Remove the outer wing nut and air cleaner cover.
2. Remove the inner wing nut that secures the elements.
3. Remove the air cleaner elements (inner paper and outer
foam) and check to be sure they are clean and in good
condition.
4. Clean or replace the elements as necessary (page 29).
5. Reinstall the air cleaner elements, inner wing nut, cover and
outer wing nut.
jl
Never run the engine without the air cleaner. Rapid engine
wear will result.
OUTER WING NUT
INNER WING NUT
PAPER ELEMENT
AIR CLEANER COVER
- FOAM ELEMENT
RUBBER WASHER
14
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