Honda WJR4025 Owner's Manual

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Honda WJR4025
OWNER’S MANUAL
MANUAL DE EXPLICACIONES
4MYH3M010.book
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Thank you for purchasing a Honda backpack sprayer.
This manual covers the operation and maintenance of Honda
backpack sprayer WJR4025.
All information in this publication is based on the latest product
information available at the time of approval for 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 backpack
sprayer and should remain with the backpack sprayer if it is resold.
Pay special attention to statements preceded by the following words:
Indicates a strong possibility of severe personal injury or
death if instructions are not followed.
CAUTION: Indicates a possibility of equipment or property damage if
instructions are not followed.
NOTE: Gives helpful information.
If a problem should arise, or if you have any questions about the
backpack sprayer, consult an authorized Honda dealer.
Honda backpack sprayer is designed to give safe and dependable
service if operated according to instructions.
Read and understand the Owner’s Manual before operating the
backpack sprayer. Failure to do so could result in personal injury or
equipment damage.
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Disposal
To protect the environment, do not dispose of this product, battery,
engine oil, etc. carelessly by leaving them in the waste. Observe
the local laws and regulations or consult your authorized Honda
dealer for disposal.
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CONTENTS
1. SAFETY INSTRUCTION ........................................................................3
2. SAFETY LABEL LOCATIONS .............................................................13
3. COMPONENT IDENTIFICATION ........................................................15
4. CONTROLS .........................................................................................19
5. PREPARATION ....................................................................................24
6. PRE-OPERATION CHECK ...................................................................28
7. STARTING THE ENGINE ....................................................................38
• High altitude operation ...................................................................43
8. STOPPING THE ENGINE ....................................................................44
9. OPERATION ........................................................................................45
10. MAINTENANCE ................................................................................52
11. TRANSPORTING/STORAGE ............................................................65
12. TROUBLESHOOTING .......................................................................69
13. SPECIFICATIONS ..............................................................................70
14. MAJOR Honda DISTRIBUTOR ADDRESS ......................................72
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1. SAFETY INSTRUCTION
1. Field of application
The device is approval for agricultural use.
Other possible fields of application:
forestry, hops cultivation, fruit growing, specialized cultivation,
viticulture, tree nurseries, vegetable farming, non-cropland,
grassland, storage protection, greenhouse cultivation, cultivation of
ornamentals.
2. A general warning on the use of chemicals (filling, spraying,
cleaning, etc.)
• Always obey the National law.
• Obey to the chemicals instruction.
3. Information about filling the device and safety measures
To fill:
• Apply only as much liquid as needed.
• Do not fill the container above the maximum fill line.
• Ensure that no liquid spills out or splashes back.
• When using tap water, do not allow the filling hose dip into the
liquid without safety precautions.
• Draw from surface water only after official authorization while
avoiding all contamination.
Safety measures:
• Observe the instructions for the safety of the user in the
instruction manual of the pesticide and wear the recommended
body protection, if necessary.
• Do not eat, smoke or drink while working with pesticides.
• Thoroughly clean hands and face after work is completed.
• Keep pest control devices and pesticides away from children.
• Never blow out nozzles and other small parts with your mouth.
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4. Information about how long the backpack sprayer can be used
• The same person should not perform spray operations for a long
time or every day.
• Do the operations while taking a moderate rest.
5. Information about the device operating and setting ranges
The following must be entered individually for each nozzle assembly.
Optimal distance from nozzle to the target surface, the associated
working width, the spraying angle, the spraying pressure range
with associated flow rates, the optimal spraying pressure and
recommended fields of application.
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To ensure safe operation
Operator Responsibility
• Any part from the machine is a potential source of danger if the
machine is used in abnormal conditions or if the maintenance is not
done correctly.
• Read the Owner’s Manual carefully. Be familiar with the controls
and their proper use of the backpack sprayer. Know how to stop the
engine rapidly.
• Use the backpack sprayer for the purpose it is intended for, that is
spraying agricultural chemicals or water.
Any other use could be dangerous or damage the backpack sprayer.
• The recommended operating range of this backpack sprayer is 5°C
to 40°C (41°F to 104°F).
Do not use the backpack sprayer if it is frozen.
• Never allow children or people unfamiliar with this Owner’s Manual
to use the backpack sprayer. Local regulations may restrict the age
of the operator.
• If you lend or resell your backpack sprayer to a third person, instruct
him or her with how to handle the product and alert him or her to
read and understand the Owner’s Manual carefully before
operation.
• The person with the following conditions are advised not to spray
agricultural chemicals or to help someone else spray agricultural
chemicals.
* Liver or kidney disorder
* Allergies
* Sensitivity to chemical
* A sickly person or a person recovering from disease
* Personal Injury
* During Menstruation
* During Pregnancy
The chemicals involved may be harmful to their health.
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To ensure safe operation
Operator Responsibility
• Never operate the backpack sprayer while:
– people, especially children or pets are nearby.
– user is fatigued or under medication, or has swallowed
substances known to affect judgement or reactions.
• Keep in mind that the operator or user is responsible for accidents
or hazards occurring to other people or their property.
• Before each use, visually inspect the backpack sprayer for any
damage and looseness of fastening part.
• Before each use, look around and underneath the engine for signs
of oil or gasoline leaks.
• Because the tank when completely filled with the chemical is very
heavy, pay careful attention not to hurt your lower back when
carrying it.
• Always adopt a safe working posture when carrying the tank. Do not
work at elevated sites using stairs or ladders while carrying the tank.
• Avoid operating the backpack sprayer at night or in a bad weather of
poor visibility, because there is much possibility of accident.
• Always confirm the path ahead is safe when spraying. Walking
forward when spraying is recommended. Avoid walking backwards
when spraying as this makes it difficult to confirm that the path
ahead is safe.
• Avoid operating the backpack sprayer on a steep slope.
The steep slope is very slippery, so you can slip down.
• Do not operate the backpack sprayer with the labels, and other parts
removed.
• Do not mount an incorrect part and do not tamper with the backpack
sprayer as it can result in personal injury and/or equipment damage.
• Keep all nuts, bolts and screws tight to be sure the backpack sprayer
is in safe working condition. Regular maintenance is an essential aid
to user’s safety and retaining a high level of performance.
• To prevent from incorrect functioning of the backpack sprayer,
follow to the chemicals instruction carefully.
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To ensure safe operation
How to handle agricultural chemicals
When handling agricultural chemicals, follow the directions of the
manufacturer or distributor. Also, follow the laws and regulations.
• The person that spray agricultural chemicals, or who assist in
spraying them, must put on protective clothes so they don’t inhale
the chemicals or touch them directly.
This attire usually includes:
* Waterproof cap, long sleeved shirt, long pants
* Rubber gloves, rubber boots
* Protective goggles, protective mask
* Ear plugs
Please understand that touching and inhaling agricultural chemicals
is hazardous to your health and could poison you.
Check and maintain protective equipment to maintain their normal
functions at all times, and use them correctly.
WATERPROOF CAP
PROTECTIVE GOGGLES
EAR PLUGS
PROTECTIVE MASK
LONG SLEEVED SHIRT
(Waterproof)
RUBBER GLOVES
LONG PANTS
(Waterproof)
RUBBER BOOTS
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To ensure safe operation
How to handle agricultural chemicals
• Before starting the engine, make sure that the sprayer hoses are
securely installed into the backpack sprayer, and that the shut-off
valves are in the “CLOSED” position. If you fail to do so, agricultural
chemicals may splash on you during operation.
• When agricultural chemicals touch your skin by mistake, wash it
with soap immediately. If agricultural chemicals soak into your
clothing, change it.
• When you feel dizzy or nauseous and have a headache or a
stomachache, see a doctor immediately. Inform him of what
chemicals you use and your operation (operating time, operating
area, operating means, etc.). Immediate care is required to avoid
serious chemical injuries.
• Do not direct the nozzle towards anyone when you spray
agricultural chemicals. Stop your work, if children or those
uninvolved are getting closer to you when you spray agricultural
chemicals.
• Know the direction of the wind when you spray agricultural
chemicals. Have the wind at your back to avoid the spray. If you
spray agricultural chemicals against the direction of the wind, do
not touch the sprayed crops. Breathing or touching chemicals
harms your health.
• You should make a plan when you weed and spray agricultural
chemicals to prevent insects. In addition, insect prevention should
be done systematically. This means, weed the area first, as opposed
to last, and spray the land after weeding. This prevents having to
weed afterwards and protects yourself from weeding around freshly
sprayed agricultural chemicals.
• Do not do spray for a long time or everyday. Breaks must be taken
during operation. People in a tired state are prone to be affected
easily by the agricultural chemicals when operating the backpack
sprayer.
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To ensure safe operation
How to handle agricultural chemicals
• Do not spray the chemicals in the daytime while the temperature is
high, or on a day of strong wind. Do not spray the chemicals in a
busy place during a busy time especially when school children are
likely to pass through. If you spray the chemicals under strong
sunlight, the sprayed chemicals become concentrated and can be
more potent to your health. If you spray the chemicals on days of
strong wind, the chemicals can blow to other places and harm other
people or animals, such as domestic animals, kept bees, silk worms,
or aquatic animals.
• Read and understand all the labels for the chemicals, directions, and
cautions to ensure their proper usage. Be aware of the toxicity of the
chemicals and the first aid treatment needed to prepare for the
worst.
Ignoring the cautions could cause a serious accident.
• Do not eat, drink, or smoke during the spray of chemicals. Wash
your hands and face carefully with soap. Also, rinse out your mouth
before taking a break or before eating or smoking after the spray
work is done, in order to protect yourself from the harm of the
chemicals.
• Do not transport nor store food and drinks in the same container as
the chemicals or the backpack sprayer to prevent cross
contamination.
• The remainder of the chemicals must be sealed and stored in a box
with a lock and key separate from the food and feed so as not to
cause a serious accident.
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To ensure safe operation
How to handle agricultural chemicals
• After using the backpack sprayer, store it in a place where children
and domestic animals are locked out.
Careless storage can cause exposure to children or animals, which
could be harmful to their health.
• Do not use the chemicals indicated as “No fire”, such as sulfur,
emulsion and grease, near fire (bonfire, cigarette, etc.).
Put the chemicals in a cool place away from all fires.
• Clean the backpack sprayer carefully. Dispose the wastewater in non
agricultural land. Incomplete cleaning can cause the chemical
residue on the product to react with different chemicals used later
on, which could be harmful.
• Follow the instructions prepared by makers or distributors and the
regulations when disposing bags, cardboard boxes or plastic
containers of the chemicals.
• After the spray work, take a bath to wash yourself carefully with
soap.
Take off and wash all the clothes you wore. If you put on the same
clothes that you wore during the spray work again on the next day,
the leftover chemicals could be harmful.
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To ensure safe operation
Fire and Burn Hazard
Gasoline is extremely flammable, and gasoline vapor can explode.
Use extreme care when handling gasoline. Keep gasoline out of reach
of children.
• Store fuel in containers specifically designed for this purpose.
• Refuel outdoors only, and do not smoke while refueling or handling
fuel.
• Add fuel before starting the engine. Never remove the cap of the
fuel tank or add gasoline while the engine is running or when the
engine is hot.
• If gasoline is spilled, do not attempt to start the engine but move the
backpack sprayer away from the area of spillage and avoid creating
any source of ignition until gasoline vapors have dissipated.
• Tighten all fuel tanks and container caps securely.
• When you start the engine after refueling, be sure to start the engine
at least 3 m away from the refueling spot.
• Never store the backpack sprayer with gasoline in the tank inside a
building where fumes may reach an open flame, spark or high
temperature source.
• Allow the engine to cool before storing in any enclosure.
• To reduce the fire hazard, keep the backpack sprayer, especially the
engine, muffler, the gasoline storage area as well, free of grass,
leaves, or excessive grease.
Do not leave containers of vegetable matters in or near building.
• If the fuel tank has to be drained, this should be done outdoors, with
a cold engine.
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To ensure safe operation
Carbon Monoxide Poisoning Hazard
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 engine in an area that is confined or even partially
enclosed, the air you breathe could contain a dangerous amount of
exhaust gas. To keep exhaust gas from building up, provide
adequate ventilation.
• Replace faulty muffler.
• Do not operate the engine in a confined space where dangerous
carbon monoxide fumes can collect.
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2. SAFETY LABEL LOCATIONS
These labels warn you of potential hazards that can cause serious
injury. Read the labels and safety notes and precautions described in
this manual carefully.
If a label comes off or becomes hard to read, contact your Honda
dealer for a replacement.
OPERATOR CAUTION
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• Honda backpack sprayer is designed to give
safe and dependable service if operated
according to instructions.
Read and understand the Owner’s Manual
before operating the backpack sprayer. Failure
to do so could result in personal injury or
equipment damage.
• Exhaust contains poisonous carbon monoxide,
a colorless, odorless gas. Breathing carbon
monoxide can cause loss of consciousness and
may lead to death.
• If you run the backpack sprayer in an area that
is confined, or even partially enclosed area, the
air you breathe could contain a dangerous
amount of exhaust gas.
• Never run your backpack sprayer inside a
garage, house, or near open windows or doors.
• Wear eye protection, protective mask and
other protective devices to protect your
eyes and body from agriculture chemicals.
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3. COMPONENT IDENTIFICATION
Nozzle and head types variation table
parts
• :: Standard
Optional parts
*
Model types
Nozzle and head types
WJR4025
GCM
Blue head (×2)
*
2-Head (×2)
•
4-Head (×2)
*
Long distance (×2)
*
Model types
Connecting parts
Shut-off valve (×2)
Roller joint (×2)
WJR4025
GCM
Sprayer hose (short)
[right-hand side hose]
Sprayer hose (long)
[left-hand side hose]
•
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SPRAYER HOSE (short)
BLUE HEAD / 2-HEAD /
4-HEAD TYPES
ROLLER JOINT
CHEMICAL TANK
SHUT-OFF VALVE
NOZZLE PIPE
PRESSURE DIAL
LONG DISTANCE TYPE
ENGINE SWITCH
THROTTLE LEVER
ROLLER JOINT
SHUT-OFF VALVE
SPRAYER HOSE (long)
4-HEAD NOZZLE
BLUE HEAD / 2-HEAD /
4-HEAD TYPES
SHUT-OFF VALVE
SPRAYER HOSE
(short)
ROLLER JOINT
NOZZLE PIPE
LONG DISTANCE TYPE
SHUT-OFF
VALVE
ROLLER JOINT
HOLDER BAND
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NOZZLE HOLDER
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CHEMICAL TANK
CAP
TANK FILTER
DRAIN CAP
PUMP OIL INSPECTION WINDOW
SWITCHING VALVE
SHOULDER HARNESSES
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FRAME SERIAL NUMBER
FUEL RETURN TUBE
AIR CLEANER
STARTER GRIP
CHOKE LEVER
MUFFLER
OIL FILLER CAP
PRIMING PUMP
FUEL TUBE
ENGINE TYPE
FUEL TANK CAP
FUEL TANK
ENGINE SERIAL NUMBER
Record the frame serial number and engine serial number in the
space below. You will need these serial numbers when ordering parts,
and when making technical or warranty inquiries.
Engine serial number: ___________________________________________
Frame serial number: ____________________________________________
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4. CONTROLS
Engine switch
The engine switch enables and disables the ignition system. The
engine switch must be in the ON position for the engine to run.
Turning the engine switch to the OFF position stops the engine.
ENGINE SWITCH
ON
OFF
ON
OFF
Throttle lever
The throttle lever controls engine speed from SLOW to FAST, it will
stay in any designated position.
SLOW
FAST
FAST
SLOW
THROTTLE LEVER
STOPPER
NOTE:
The throttle lever is regulated by the stopper. Do not change the
stopper position to forcibly increase the engine speed. Overspeeding
the engine impairs the pump's performance and adversely affects the
engine and pump.
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Choke lever
The choke lever opens and closes the choke valve in the carburetor.
The CLOSED position enriches the fuel mixture for starting a cold
engine. The OPEN position provides the correct fuel mixture for
operation after starting, and for restarting a warm engine.
CHOKE LEVER
CLOSED
OPEN
CLOSED
OPEN
Recoil starter
Pulling the starter grip operates the recoil starter to crank the engine
for starting.
Priming pump
Pressing the priming pump feeds the fuel from the fuel tank to the
carburetor. This procedure is necessary for starting the engine.
STARTER GRIP
PRIMING PUMP
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Switching valve
The switching valve can be used to switch between spraying with two
nozzles and spraying with one nozzle (right-hand side only).
Spraying with two nozzles:
Turn the switching valve to the OPEN position.
RIGHT-HAND
SIDE NOZZLE
LEFT-HAND
SIDE NOZZLE
OPEN
SWITCHING
VALVE
Spraying with one nozzle (right-hand side only):
Turn the switching valve to the CLOSED position and remove the
sprayer hose (long).
SPRAYER HOSE
(long)
CLOSED
RIGHT-HAND
SIDE NOZZLE
SWITCHING
VALVE
CLOSED
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Shut-off valve
Use the shut-off valve when spraying or stop spraying.
LONG DISTANCE TYPE
BLUE HEAD / 2-HEAD / 4-HEAD TYPES
SHUT-OFF VALVE
CLOSED
OPEN
SHUT-OFF
VALVE
CLOSED
CLOSED
CLOSED
OPEN
Nozzle handle (Long distance type only)
Use the nozzle handle to adjust the spray angle and distance.
• When you turn the nozzle handle clockwise, spray angle will spread
and distance will shorten.
• When you turn the nozzle handle counterclockwise, spray angle will
narrow and distance will increase.
NOZZLE HANDLE
CLOCKWISE
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NOZZLE HANDLE
COUNTERCLOCKWISE
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Pressure dial
Use the pressure dial when adjusting the spraying pressure and amount.
• When you turn the pressure dial clockwise (HIGH), the spraying
pressure and amount will increase.
• When you turn the pressure dial counterclockwise (LOW), the
spraying pressure and amount will decrease.
PRESSURE DIAL
HIGH
LOW
Nozzle holder (For right-hand side nozzle only)
The right-hand side 4-head nozzle, nozzle pipe, and sprayer hose (short)
can be fixed in place with the nozzle holder using the nozzle band.
Do not insert both the right-hand side and left-hand side nozzle pipes
and nozzle hoses into the nozzle holder at the same time.
If the holder band breaks, replace it with a new piece.
4-HEAD NOZZLE
SPRAYER HOSE
(short)
NOZZLE PIPE
HOLDER BAND
NOZZLE HOLDER
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5. PREPARATION
Before operation, assemble the nozzle and sprayer hose, then connect
the sprayer hose into the pump chamber.
1. Assemble the nozzle and sprayer hose.
For more information about the nozzle and head type variations, see
page 15.
Blue head / 2-head / 4-head types:
Be sure to install packings and connect each part securely.
a. Connect the sprayer hose (short) into the roller joint.
b. Connect the roller joint into the nozzle handle.
c. Connect the nozzle handle into the shut-off valve.
d. Connect the shut-off valve into the nozzle pipe.
NOZZLE PIPE
SHUT-OFF VALVE
NOZZLE HANDLE
ROLLER JOINT
SPRAYER HOSE
(short)
PACKINGS
e. Connect the nozzle pipe into the nozzle.
PACKING
BLUE HEAD NOZZLE
2-HEAD NOZZLE
NOZZLE PIPE
4-HEAD NOZZLE
f. Assemble the left-hand side nozzle and sprayer hose (long) using
the same procedure.
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Long distance type:
Be sure to install packings and connect each part securely.
a. Install the 12 mm nut to the nozzle pipe.
b. Connect the nozzle handle into the nozzle pipe.
NOZZLE PIPE
12 mm NUT
NOZZLE HANDLE
c. Connect the sprayer hose (short) into the roller joint.
d. Connect the roller joint into the shut-off valve.
e. Connect the shut-off valve into the nozzle pipe.
NOZZLE PIPE
PACKING
SHUT-OFF VALVE
ROLLER JOINT
PACKINGS
SPRAYER HOSE
(short)
f. Assemble the left-hand side nozzle and sprayer hose (long) using
the same procedure.
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2. After assembling the nozzle and sprayer hose, connect the sprayer
hose into the pump chamber.
• To spray with two nozzles, connect the sprayer hoses to the pump
chamber, and then turn the switching valve to the OPEN position.
• To spray with one nozzle (right-hand side), connect the sprayer hose
(short) to the pump chamber with the sprayer hose (long)
disconnected from the pump chamber. Also, turn the switching
valve to the CLOSED position.
PUMP CHAMBER
CLOSED
SPRAYER HOSE
(short)
SPRAYER HOSE
(long)
OPEN
CLOSED
SWITCHING VALVE
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3. Check the shoulder harness.
Make sure that the bottom hook of the shoulder harness is connected.
BOTTOM HOOK
SHOULDER HARNESS
CAUTION:
When you put the backpack sprayer on your back, make sure that the
shoulder harness is not entangled with the throttle lever.
:INCORRECT
THROTTLE LEVER
SHOULDER HARNESS
:CORRECT
THROTTLE LEVER
SHOULDER HARNESS
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6. PRE-OPERATION CHECK
For safe and efficient spraying, always make a pre-operation
inspection before operating:
Before performing a pre-operation inspection, place the backpack
sprayer on a level surface, stop the engine and make sure that the
engine switch is in the OFF position to be certain the engine will not
start accidentally.
Before each use, look around and underneath the engine for signs of
oil or gasoline leaks.
1. Check the engine oil level.
Every 10 hours, check the engine oil level and replenish oil up to the
upper limit if the engine is operated for long time continuously.
CAUTION:
Engine oil is a major factor affecting engine performance and service
life. Nondetergent or vegetable oils are not recommended.
Check the engine oil level with the engine stopped and in a level
position.
a. Remove the oil filler cap.
b. Check the oil level. If it is below the upper limit, fill with the
recommended oil (see page 29) to the upper limit.
c. Reinstall the oil filler cap securely.
Add the engine oil slowly to avoid overflowing, as the engine oil tank
capacity is small.
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CAUTION:
• Running the engine with insufficient oil can cause serious engine
damage.
• Be sure to check the engine on a level surface with the engine
stopped.
OIL FILLER CAP
UPPER LIMIT
Recommended Oil
Use 4-stroke motor oil that meets or exceeds the requirements for API
service classification SE or later (or equivalent). Always check the API
service label on the oil container to be sure it includes the letters SE 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.
CAUTION:
Using nondetergent oil or 2-stroke engine oil could shorten the
engine’s service life.
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2. Check the fuel level.
Use automotive unleaded gasoline with a Research Octane Number of
91 or higher (a Pump Octane Number of 86 or higher).
Never use gasoline that is stale, contaminated, or mixed with oil.
Avoid getting dirt or water in the fuel tank.
• Gasoline is extremely flammable and is explosive under certain
conditions.
• Refuel in a well-ventilated area with the engine stopped. Do not
smoke or allow flames or sparks in the area where the engine is
refueled or where gasoline is stored.
• Do not overfill the fuel tank (there should be no fuel in the filler
neck). After refueling, make sure the tank cap is closed properly and
securely.
• Be careful not to spill fuel when refueling. Spilled fuel or fuel vapor
may ignite. If any fuel is spilled, make sure the area is dry before
starting the engine.
• Avoid repeated or prolonged contact with skin or breathing of
vapor. KEEP OUT OF REACH OF CHILDREN.
CAUTION:
Gasoline substitutes are not recommended; they may be harmful to
fuel system components.
NOTE:
Gasoline spoils very quickly depending on factors such as light
exposure, temperature and time. In worst cases, gasoline can be
contaminated within 30 days.
Using contaminated gasoline can seriously damage the engine
(carburetor clogged, valve stuck).
Such damage due to spoiled fuel is disallowed from coverage by the
warranty.
To avoid this please strictly follow these recommendations:
• Only use specified gasoline.
• Use fresh and clean gasoline.
• To slow deterioration, keep gasoline in a certified fuel container.
• If long storage (more than 30 days) is foreseen, drain fuel tank and
carburetor (see page 67).
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a. Place the backpack sprayer horizontally, and check from the
outside of the tank to see if there is enough fuel.
b. If the fuel level is low, refuel the fuel tank. Do not overfill the
upper fuel level.
Remove the fuel tank cap gradually to release a pressurized air in
the fuel tank. Fuel in the fuel tank may spout out, if the fuel tank
cap is removed quickly.
FUEL TANK CAP
UPPER
FUEL LEVEL
Gasoline containing alcohol
If you decide to use a gasoline containing alcohol (gasohol), be sure
its octane rating is at least as high as that recommended by Honda.
There are two types of “gasohol”: one containing ethanol, and the
other containing methanol.
Do not use gasohol that contains more than 10% ethanol.
Do not use gasoline containing more than 5% methanol (methyl or
wood alcohol) and that does not also contain co-solvents and
corrosion inhibitors for methanol.
NOTE:
• Fuel system damage or engine performance problems resulting
from the use of gasoline that contains more alcohol than
recommended is not covered under the warranty.
• Before buying gasoline from an unfamiliar station, first determine if
the gasoline contains alcohol, if it does, find out the type and
percentage of alcohol used.
If you notice any undesirable operating symptoms while using a
particular gasoline. Switch to a gasoline that you know contains less
than the recommended amount of alcohol.
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3. Check the air cleaner element.
Never use gasoline or low flash point solvents for cleaning the air
cleaner element. A fire or explosion could result.
CAUTION:
Never run the engine without the air cleaner. Rapid engine wear will
result from contaminants, such as dust and dirt, being drawn through
the carburetor, into the engine.
a. Move the choke lever to the CLOSED position (see page 20).
b. Remove the air cleaner cover by unhooking the upper tab on the
top of the cover and its two lower tabs.
c. Check the air cleaner element to be sure it is clean and in good
condition.
If the element is dirty, clean it (see page 56). Replace the element
if it is damaged.
d. Reinstall the element and the cover by inserting the lower tabs,
then insert the upper tab.
UPPER TAB
CHOKE LEVER
AIR CLEANER COVER
UPPER TAB
AIR CLEANER ELEMENT
LOWER TABS
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4. Check the throttle cable free play.
a. Remove the air cleaner cover (see page 32).
b. Check the throttle cable free play at the tip of the cable by pulling
and releasing the throttle lever a few times.
Free play: 0.5–2.5 mm
If the free play is incorrect, loosen the lock nut and turn the
adjusting nut in or out as required to obtain the correct free play.
FREE PLAY:
0.5–2.5 mm
LOCK NUT
DECREASE
FREE PLAY
INCREASE
FREE PLAY
ADJUSTING NUT
c. Tighten the lock nut.
d. Check the throttle lever operates smoothly.
e. Reinstall the air cleaner cover (see page 32).
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5. Check the pump oil.
Check if the pump oil is not contaminated and does not appear milky.
Check that the oil level is not below from the middle level of the
inspection window.
If you notice either condition, consult your servicing dealer.
PUMP OIL INSPECTION
WINDOW
MIDDLE LEVEL
6. Check the nozzle.
If the backpack sprayer sprays irregularly, disassemble the nozzle and
maintain it.
• If there is any stain or clog, clean it off.
• If the nozzle is damaged, replace it.
BLUE HEAD TYPE
LONG DISTANCE TYPE
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2-HEAD TYPE
4-HEAD TYPE
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7. Check the chemical tank and tank filter.
a. Remove the chemical tank cap and drain cap. Check the caps and
packings for cracks or damage. If they are damaged, replace them.
b. Remove the tank filter. Check the tank filter for clog or damage.
• If it is damaged, replace it.
• If it is dirty or clogged, clean it using water.
CHEMICAL TANK CAP
TANK FILTER
CHEMICAL TANK
DRAIN CAP
c. Check the chemical tank for cracks or damage.
• If it is cracked or damaged, replace it.
• If the inside of the chemical tank is dirty, clean it using water.
CHEMICAL TANK
d. Install the tank filter.
e. Tighten the chemical tank cap and drain cap securely.
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8. Fill agricultural chemicals into the tank.
Read the instructions of the chemical carefully. Always follow the
directions and precautions preparation and handling of the chemical.
Make sure that the drain cap is securely tightened when filling
agricultural chemicals into the tank.
DRAIN CAP
On a level surface, fill agricultural chemical into the tank by using the
tank filter.
NOTE:
When you fill agricultural chemicals into the tank, be sure to use the
tank filter. Any foreign substance or dust will cause trouble to the
pump and nozzles.
25 L
20 L
TANK FILTER
15 L
10 L
5L
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9. Check that all nuts, bolts, and screws are tightened.
Tighten the bolts and nuts properly and securely, if necessary.
10.Check leaking from the pump.
After starting the engine, look around each connection part for
chemical leaks.
BLUE HEAD / 2-HEAD / 4-HEAD TYPES
LONG DISTANCE TYPE
SPRAYER HOSES
BLUE HEAD NOZZLE
2-HEAD NOZZLE
4-HEAD NOZZLE
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7. STARTING THE ENGINE
• Exhaust gas contains poisonous carbon monoxide. Never run the
engine in an enclosed area. Be sure to provide adequate ventilation.
• Start the engine in a place away from the people, pets, and
surrounding buildings. Be sure there are no obstacles in the
working area.
NOTE:
Do not operate the backpack sprayer without sufficient amount of
chemicals in the chemical tank.
Fill 1 Liter or more chemicals into the chemical tank (see page 36).
• To prevent the use of the backpack sprayer without sufficient
amount of chemicals in the tank, as soon as the nozzle has stopped
spraying chemicals, stop the engine.
• If the amount of chemicals in the chemical tank becomes 1 Liter or
less, the pump sucks air, and will prevent spraying chemical.
• If you continue to operate the backpack sprayer without sufficient
amount of chemicals, the pump may be damaged.
1. To spray with two nozzles, turn the switching valve to the OPEN
position.
To spray with one nozzle (right-hand side), turn the switching valve
to the CLOSED position with the sprayer hose (long) disconnected.
CLOSED
SPRAYER HOSE
(short)
SPRAYER HOSE
(long)
OPEN
SWITCHING VALVE
CLOSED
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2. Turn the pressure dial counterclockwise (LOW) till it stops and set it
to totally-closed state.
PRESSURE DIAL
LOW
3. Turn the shut-off valve to the CLOSED position.
BLUE HEAD / 2-HEAD / 4-HEAD TYPES
LONG DISTANCE TYPE
SHUT-OFF VALVE
CLOSED
SHUT-OFF
VALVE
CLOSED
CLOSED
CLOSED
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4. To start a cold engine, move the choke lever to the CLOSED
position.
To restart a warm engine, leave the choke lever in the OPEN
position.
CHOKE LEVER
CLOSED
OPEN
CLOSED
OPEN
5. Press the priming pump several times until the priming pump is
filled with fuel.
Even if the priming pump is pressed too many times, the extra fuel
will return to the fuel tank.
If the priming pump is not pressed enough, the engine may not start.
PRIMING PUMP
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6. Make sure that the throttle lever is in the SLOW position.
SLOW
THROTTLE LEVER
7. Turn the engine switch to the ON position.
ENGINE SWITCH
ON
ON
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8. Hold the engine top cover securely and pull the starter grip lightly
until you feel resistance, then pull it briskly in the direction of the
arrow as shown below.
Return the starter grip gently.
• Be sure that the people and pets are away from the backpack
sprayer especially behind you, before pulling the starter grip.
CAUTION:
Do not allow the starter grip to snap back against the engine. Return it
gently to prevent damage to the starter.
NOTE:
Always pull the starter grip briskly. If not pulled briskly, sparks may
fail to jump across the spark plug electrodes, resulting in failure to
start the engine.
ENGINE TOP COVER
Direction to pull
STARTER GRIP
9. 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
CLOSED
OPEN
CLOSED
OPEN
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Hot Restart
If the engine is operated at higher ambient temperatures then turned
off and allowed to sit for a short time, it may not restart on the first
pull.
If necessary, use for following procedure:
IMPORTANT SAFETY PRECAUTION
Turn the engine switch to the OFF position before performing the
following procedure. This will prevent the engine from starting and
running at maximum speed when the throttle is in the full throttle
position. If the engine starts, with the throttle in the full throttle
position, agricultural chemicals may splash on you if the shut-off
valve is in the “OPEN” position. This may result in personal injury.
1. Turn the engine switch to the OFF position.
2. Move the choke lever to the OPEN position.
3. Move the throttle lever in the full throttle position (FAST).
4. Pull the starter grip 3 to 5 times.
5. Follow the STARTING THE ENGINE procedure on page 38 and start
the engine with the choke lever in the OPEN position.
• High altitude operation
At high altitude, the standard carburetor air-fuel mixture will be
excessively rich. Performance will decrease, and fuel consumption
will increase.
High altitude performance can be improved by specific modifications
to the carburetor. If you always operate the backpack sprayer at
altitudes higher than 1,500 m above sea level, have your authorized
Honda dealer perform these carburetor modifications.
Even with suitable carburetor jetting, engine horsepower will
decrease approximately 3.5% for each 300 m increase in altitude. The
effect of altitude on horsepower will be greater than this if no
carburetor modification is made.
CAUTION:
Operation of the backpack sprayer at an altitude lower than the
carburetor is jetted for may result in reduced performance,
overheating, and serious engine damage caused by an excessively
lean air/fuel mixture.
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8. 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. Turn the shut-off valve to the CLOSED position.
BLUE HEAD / 2-HEAD / 4-HEAD TYPES
LONG DISTANCE TYPE
SHUT-OFF VALVE
CLOSED
SHUT-OFF
VALVE
CLOSED
CLOSED
CLOSED
2. Move the throttle lever to the SLOW position.
SLOW
THROTTLE LEVER
3. Turn the engine switch to the OFF position.
ENGINE SWITCH
OFF
OFF
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9. OPERATION
Read and understand the safety instructions on pages 3 to 12 before
operating the backpack sprayer.
If you notice any abnormal sound, smell, vibration or other unusual
signs, stop the engine immediately and consult your authorized
Honda dealer.
Before operation
• Fill 1 Liter or more agricultural chemicals into the chemical tank
while keeping the chemical tank in a level position (see page 36).
• If the left-hand side nozzle will not be used to spray, turn the
switching valve to the CLOSED position and remove the nozzle from
the backpack sprayer (see page 21).
• Make sure that the shut-off valve is to the CLOSED position (see
page 22).
• Make sure that the throttle lever is in the SLOW position (see page 19).
• Make sure that the pressure dial has been turned counterclockwise
(LOW) till it stops and is set to the totally-CLOSED position (see page
23).
Operation
1. Start the engine according to the engine start procedure (see page 38).
2. Remove the holder band from the nozzle holder.
3. Remove the sprayer hose and the nozzle pipe from the nozzle holder.
NOZZLE PIPE
SPRAYER HOSE
NOZZLE HOLDER
HOLDER BAND
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4. Put the backpack sprayer on a flat table.
5. Make sure that the shoulder harness is not entangled with the
throttle lever.
:INCORRECT
THROTTLE LEVER
SHOULDER HARNESS
:CORRECT
THROTTLE LEVER
SHOULDER HARNESS
Then put the backpack sprayer on your back.
• Put the harness on your shoulders to carry the backpack sprayer.
• Adjust the shoulder harness length.
SHOULDER HARNESS
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6. Pass the sprayer hose (long) behind your body.
SPRAYER HOSE (long)
SPRAYER HOSE (short)
7. Turn the shut-off valve to the OPEN position.
BLUE HEAD / 2-HEAD / 4-HEAD TYPES
LONG DISTANCE TYPE
SHUT-OFF VALVE
SHUT-OFF VALVE
OPEN
OPEN
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8. Turn the pressure dial towards clockwise (HIGH) to make the
spraying pressure suited for the operating conditions.
• When you turn the pressure dial clockwise (HIGH), the spraying
pressure and amount will increase.
• When you turn the pressure dial counterclockwise (LOW), the
spraying pressure and amount will decrease.
PRESSURE DIAL
HIGH
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9. Move the throttle lever at the desired position while observing the
spray condition.
NOTE:
The centrifugal clutch is used in this backpack sprayer.
When the engine is rotating in low speed range, the clutch is
slipping and the pump does not operate.
Do not use the backpack sprayer in this rotation range that makes
the clutch slip. Otherwise, the clutch may be damaged.
SLOW
FAST
FAST
SLOW
THROTTLE LEVER
Long distance nozzle:
Adjust the spray angle and distance by turning the nozzle handle
while observing the spray condition.
• When you turn the nozzle handle clockwise, spray angle will spread
and distance will shorten.
• When you turn the nozzle handle counterclockwise, spray angle will
narrow and distance will increase.
NOZZLE HANDLE
CLOCKWISE
NOZZLE HANDLE
COUNTERCLOCKWISE
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During operation
• Do not point the nozzle at others.
• Pay attention to the rest of chemicals in the tank.
To prevent the use of the backpack sprayer without sufficient amount
of chemicals in the tank, as soon as the nozzle has stopped spraying
chemicals, stop the engine, or the pump may be damaged.
Fill 1 Liter or more chemicals into the chemical tank (see page 36).
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After operation
When handling agricultural chemicals, follow the directions of the
manufacturer or distributor. Also, follow the laws and regulations.
1. Stop the engine (see page 44).
2. After the engine cooled, remove the
drain cap to drain the agricultural
chemicals from the chemical tank.
3. Install the drain cap and remove the
chemical tank cap to pour clean water
into the tank to rinse its inside.
4. Start the engine again (see page 38) and
move the throttle lever between the
FAST position and the SLOW position
(see page 49).
Move the shut-off valve a few times.
Spray a few minutes. Remove the drain
cap again to drain the water from the
tank.
5. Fix the right-hand side nozzle pipe and sprayer hose (short) in place
with the nozzle holder, and secure them with the holder band (see
page 23).
For the left-hand side nozzle, turn the switching valve to the
CLOSED position, and remove the nozzle pipe and sprayer hose
(long) from the backpack sprayer (see page 21).
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10. MAINTENANCE
Periodic inspection and adjustment of the backpack sprayer are
essential if high level performance is to be maintained. Regular
maintenance will also help to extend service life. The required service
intervals and the kind of maintenance to be performed are described
in the table in the following page.
• Before performing any maintenance, place the backpack sprayer on
a level surface, stop the engine and make sure that the engine
switch is in the OFF position to be certain the engine will not start
accidentally.
• The backpack sprayer should be serviced by an authorized Honda
dealer unless the owner has proper tools and service data and feels
he or she is mechanically qualified.
CAUTION:
Use only genuine Honda parts or their equivalent for maintenance or
repair. Replacement parts which are not of equivalent quality may
damage the backpack sprayer.
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Maintenance schedule
REGULAR SERVICE PERIOD (3)
Perform at every indicated month
or operating hour interval,
whichever comes first.
ITEM
Engine oil
Check level
Change
Air cleaner
Check
Clean
Spark plug
Check-adjust
Replace
Engine cooling fins Clean
Nuts, bolts,
Check
fasteners
(Retighten if
necessary)
Throttle cable
Check-adjust
Clutch shoe and Check
drum
Idle speed
Check-adjust
Valve clearance
Check-adjust
Combustion
Clean
chamber
Fuel filter
Clean
Fuel tank
Clean
Fuel tube
Check
Oil tube
Check
Seal rubber
Check
(Pump)
(Replace if
necessary)
Leakage from
Check
pump
Chemical tank
Check-Clean
and filter
Pump oil
Check level
Change
Hose, nozzle,
Check
fasteners
(Retighten if
necessary)
Nozzle
Clean
Pump grease
Supply to pump
(Grease cup)
Refill
Each
use
First
Every
Every
Every
Every
month 3 months 6 months year
2 years Refer to
or
or
or
or
or
page
10 hrs. 25 hrs. 50 hrs. 100 hrs. 300 hrs.
o
o
o
o
o (1)
o
o
o
28
55
32
56
58
58
64
o
37
o
33
o (2)
—
o (2)
o (2)
—
—
After every 300 hrs. (2)
—
o
o
Every 2 years. (Replace if necessary) (2)
Every 2 years. (Replace if necessary) (2)
61
61
—
—
o (2)
—
o (4)
37
o
35
o
o (2)
o (2)
34
—
o
37
o
34
62
63
Every 2 hrs. (5)
When Grease cup has turned till the end. (6)
(1) Service more frequently when used in dusty areas.
(2) These items should be serviced by your servicing dealer, unless you have the proper tools
and are mechanically proficient. Refer to the Honda shop manual for service procedures.
(3) For commercial use, log hours of operation to determine proper maintenance intervals.
(4) After starting the engine, check for chemical leakage from the pump.
(5) Turn both Grease cups, fully two turns, after each 2 hours of operation.
(6) Refill both Grease cups with pump grease, when the Grease cup has been turned till the end.
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Tool kit
The tools supplied are necessary for performing some periodic
maintenance, simple adjustments and repairs.
4 mm HEX. WRENCH
16×17 mm BOX WRENCH
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Changing oil
Drain the oil while the engine is still warm to assure rapid and
complete draining.
Place the backpack sprayer on a firm level surface with the engine
stopped.
1. Check the fuel tank cap is tightened securely.
2. Remove the oil filler cap and drain the oil into the oil container by
inclining the engine toward the oil filler neck.
3. Refill to the upper limit with the recommended oil (see page 29).
Add the engine oil slowly to avoid overflowing, as the engine oil
tank capacity is small.
OIL CAPACITY: 0.10 L
FUEL TANK CAP
OIL FILLER
NECK
UPPER LIMIT
4. Install the oil filler cap securely.
If any oil is spilled, make sure to wipe it.
Wash your hands with soap and water after handling used oil.
NOTE:
Please dispose of used motor oil in a manner that is compatible with
the environment. We suggest you to take it in a sealed container to
your local service station for reclamation. Do not throw it in the trash
or pour it on the ground, or down a drain.
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Air cleaner service
A dirty air cleaner will restrict air flow to the carburetor. To prevent
carburetor malfunction, service the air cleaner regularly. Service more
frequently when operating the backpack sprayer in extremely dusty
areas.
Never use gasoline or low flash point solvents for cleaning the air
cleaner element. A fire or explosion could result.
CAUTION:
Never run the engine without the air cleaner. Rapid engine wear will
result.
1. Move the choke lever to the CLOSED position (see page 40).
2. Remove the air cleaner cover by unhooking the upper tab on the top
of the cover and its two lower tabs.
3. Remove the air cleaner element.
UPPER TAB
CHOKE LEVER
AIR CLEANER COVER
UPPER TAB
AIR CLEANER ELEMENT
LOWER TABS
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4. Wash the element in a nonflammable or high flash point solvent
and dry it thoroughly.
Soak the element in clean engine oil and squeeze out the excess oil.
Clean
Squeeze and Dry
Do not twist.
Dip in Oil
Squeeze
Do not twist.
5. Wipe dirt from the air cleaner body and cover, using a moist rag. Be
careful to prevent dirt from entering the carburetor.
6. Reinstall the air cleaner element.
7. Reinstall the air cleaner cover by inserting the lower tabs, then
insert the upper tab.
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Spark plug service
Recommended spark plug: CMR5H (NGK)
CAUTION:
Never use a spark plug of incorrect heat range.
To ensure proper engine operation, the spark plug must be properly
gapped and free of deposits.
1. Loosen the 4 mm hex. bolt, then remove the engine top cover.
Do not pull the starter grip and start the engine without the engine
top cover.
There are rotating part and hot parts under the cover.
4 mm HEX. BOLT
ENGINE TOP COVER
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2. Remove the spark plug cap. Remove any dirt from around the spark
plug area.
3. Use the 16×17 mm box wrench to remove the spark plug.
If the engine has been running, the muffler will be very hot. Be careful
not to touch the muffler.
SPARK PLUG
SPARK PLUG CAP
4. Visually inspect the spark plug. Discard the spark plug if there is
apparent wear, or if the insulator is cracked or chipped.
Clean the spark plug with a wire brush if it is to be reused.
5. Measure the plug gap with a feeler gauge. Correct as necessary by
bending the side electrode.
The gap should be:
0.6–0.7 mm
SIDE ELECTRODE
0.6–0.7 mm
SEALING WASHER
INSULATOR
6. Check that the sealing washer is in good condition, and thread the
spark plug in by hand to prevent cross-threading.
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7. After the spark plug is seated, tighten with the 16×17 mm box
wrench to compress the washer.
NOTE:
When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer. When reinstalling a used spark
plug, tighten 1/8–1/4 turn after the spark plug seats to compress the
washer.
16×17 mm BOX WRENCH
8. Attach the spark plug cap.
9. Install the engine top cover, and tighten the 4 mm hex. bolt
securely.
CAUTION:
The spark plug must be securely tightened. An improperly tightened
spark plug can become very hot and may damage the engine.
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Fuel filter and fuel tank cleaning
Gasoline is extremely flammable and is explosive under certain
conditions. Do not smoke or allow flames or sparks in the area.
1. Check the oil filler cap is tightened securely.
2. Remove the fuel tank cap and drain the fuel into the container by
inclining the engine toward the fuel filler neck.
OIL FILLER CAP
FUEL FILLER NECK
3. Pull out the fuel filter with the mechanic’s wire from the fuel filler
neck gently.
FUEL FILTER
4. Check the fuel filter of its dirt. If the fuel filter is dirty, wash it gently
with nonflammable or high flash point solvent. If the fuel filter is
excessively dirty, replace it.
5. Remove water and dirt stood in the fuel tank by rinsing the inside of
the fuel tank with nonflammable or high flash point solvent.
6. Return the fuel filter into the fuel tank and tighten the fuel tank cap
securely.
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Supplying the pump grease to the pump
Every 2 hours, turn the Grease cup on the right and left side from the
dial stopper clockwise by two turns so that the both dials have the
same number of revolutions, and supply grease to the pump.
[LEFT SIDE]
[RIGHT SIDE]
GREASE CUP
GREASE CUP
Two turns
Two turns
DIAL
STOPPER
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DIAL
STOPPER
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Refilling the pump grease to the Grease cup
When the Grease cup has
turned till the end, refill both
Grease cups with pump grease.
1. Remove the Grease cup by
turning counterclockwise.
GREASE CUP
[LEFT SIDE]
[RIGHT SIDE]
2. Refill the pump grease till the top of the Grease cup.
: Lithium based multi-purpose grease#3 or equivalent
3. Install both Grease cups.
Tighten the Grease cup until the top surface of the Grease cup and
top part of the dial stopper comes in same level.
[LEFT SIDE]
[RIGHT SIDE]
DIAL
STOPPER
DIAL
STOPPER
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Cooling fin service
Inspect the cooling fins visually through the cover. If there are dry
grass, leaves and mud clogged, consult your authorized Honda dealer
for cleaning it.
COOLING FINS (inside the cover)
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11. TRANSPORTING/STORAGE
Transporting
• If the backpack sprayer has been running, allow it to cool down
before loading the backpack sprayer on the transport vehicle. A hot
engine and exhaust system can burn you and can ignite some
materials.
• Always turn the engine switch to the OFF position.
• Make sure the fuel tank cap is securely tightened.
• Keep the backpack sprayer level when transporting to reduce the
possibility of fuel leakage.
• To avoid severe burns or fire hazards, let the engine cool before
transporting the backpack sprayer or storing it indoors.
• When transporting the backpack sprayer, tighten the fuel tank cap
to prevent fuel spillage. Fuel vapor or spilled fuel may ignite.
• Drain all chemicals from the tank.
• Fix the backpack sprayer securely in level to the transport vehicle.
• Do not drive or ride on a vehicle with the backpack sprayer carrying
on your back. It might cause an unexpected accident.
• When transporting the backpack sprayer, attach nozzle pipe and
sprayer hose to the nozzle holder.
For the right-hand side nozzle, fix the nozzle pipe and sprayer hose
(short) in place with the nozzle holder. For the left-hand side nozzle,
turn the switching valve to the CLOSED position and remove the
nozzle pipe and sprayer hose (long) from the backpack sprayer.
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Storage
Before storing the backpack sprayer for an extended period;
1. Follow the procedures of “After operation” (see page 51).
2. To prevent the water from freezing in winter, drain the water
completely from pump chamber.
a. Disconnect the sprayer hoses from pump chamber, and then turn
the switching valve to the OPEN position.
To prevent the nozzle pipes from being clogged, make sure that
no dirt or dust is in the sprayer hoses or the backpack sprayer
after disconnecting the sprayer hoses.
PUMP CHAMBER
NOZZLE PIPE
OPEN
SPRAYER HOSES
b. Start the engine (see page 38).
c. Move the throttle lever between the FAST position and the SLOW
position (see page 49), and hold it there for ten seconds to drain
the pump chamber completely.
d. Stop the engine (see page 44).
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3. Drain the fuel.
Gasoline is extremely flammable and is explosive under certain
conditions. Do not smoke or allow flames or sparks in the area.
a. Check the oil filler cap is tightened securely.
b. Remove the fuel tank cap and drain the fuel into the container by
inclining the engine toward the fuel filler neck.
OIL FILLER CAP
PRIMING PUMP
FUEL FILLER NECK
c. Press the priming pump several times until all fuel has returned
to the fuel tank.
d. Tilt the engine toward the fuel filler neck again to drain the fuel
left in the fuel tank into the container.
e. Tighten the fuel tank cap securely after draining the fuel
completely.
4. Change the engine oil (see page 55).
5. Clean the air cleaner (see page 56).
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6. Lubricate the cylinder.
a. Loosen the 4 mm hex. bolt, then remove the engine top cover
(see page 58).
b. Remove the spark plug (see page 59).
c. Apply a couple of drops of clean engine oil into the cylinder.
d. Install the engine top cover temporarily.
e. Pull the starter grip several times to distribute the oil in the
cylinder.
f. Remove the engine top cover, then reinstall the spark plug.
g. Install the engine top cover, and tighten the 4 mm hex. bolt
securely.
7. Pull the starter grip slowly until resistance is felt.
8. Cover the engine to keep out dust.
9. Store the backpack sprayer in a safe, locked place inaccessible to
children or cattle, and free of dust and humidity away from sparks.
Place a tarpaulin or plastic sheet over the machine during storage.
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12. TROUBLESHOOTING
When the engine will not start:
1. Is the engine switch in the ON position?
2. Is there fuel in the fuel tank?
3. Is gasoline reaching the carburetor?
To check, press the priming pump several times.
4. Is the spark plug in good condition?
Remove and inspect the spark plug. Clean, readjust gap and dry the
spark plug. Replace it if necessary.
If the engine still does not start, take the backpack sprayer to your
servicing dealer.
When the backpack sprayer sprays irregularly:
CHEMICALS NOT SPRAYED
Check that the engine speed is not lowered (see page 49).
ATOMIZING PRESSURE NOT RAISED
1. Check the nozzle for clogging or signs of damage.
2. Disassemble and maintain the nozzle (see page 34).
If the backpack sprayer still does not operate, take the backpack
sprayer to your servicing dealer.
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13. SPECIFICATIONS
Frame
Model
Frame type
Power products description
code
Length*1
Width*1
Height*1
Dry mass [weight]*2
Chemical tank capacity
WJR4025T
GCM
WAFT
400 mm
415 mm
695 mm
12.6 kg
25 L
*1 Without hose and nozzle
*2 With pump oil
Pump
Model
Pump type
Drive system
Pressure adjust system
Pressure
Suction amount
70
WJR4025T
Plunger
Automatic centrifugal clutch
Relief valve
4.0 MPa
(at 6,700 rpm)
8.0 L/min
(at 6,700 rpm)
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Engine
Model
Engine type
Displacement
Bore×Stroke
Engine net power
(in accordance with SAE J1349*)
Engine max. net torque
(in accordance with SAE J1349*)
Cooling system
Ignition system
Fuel tank capacity
Oil capacity
Spark plug
GX35T
4-stroke, overhead cam, single cylinder
35.8 cm3
39.0×30.0 mm
1.0 kW (1.4 PS)
/7,000 rpm
1.6 N·m (0.16 kgf·m)
/5,500 rpm
Forced air
Transistor magneto
0.63 L
0.10 L
NGK: CMR5H
*The power rating of the engine indicated in this document is the net
power output tested on a production engine for the engine model
and measured in accordance with SAE J1349 at 7,000 rpm (Engine
Net Power) and at 5,500 rpm (Engine 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.
NOTE:
Specifications are subject to change without notice.
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14. MAJOR Honda DISTRIBUTOR ADDRESS
NAME OF FIRM (COMPANY)
ADDRESS
Honda de Mexico, S.A. de C.V. Carr. a El Castillo No.7250
El Salto, Jalisco C.P. 45680
72
TEL
Tel: 01-800-368-8500