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.
4MYH36100.book 1 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 3 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 4 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 5 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 6 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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. •...
4MYH36100.book 7 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 8 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 To ensure safe operation How to handle agricultural chemicals • Before starting the engine, make sure that the sprayer hose is securely installed into the backpack sprayer, and that the shut-off valve is in the “CLOSED” position. If you fail to do so, agricultural chemicals may splash on you during operation.
4MYH36100.book 9 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 10 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 11 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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. •...
4MYH36100.book 12 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
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...
4MYH36100.book 14 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 • 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.
4MYH36100.book 15 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 3. COMPONENT IDENTIFICATION Nozzle and head types variation table • : Standard parts : Optional parts — : None (Part not available) Model types WJR2525 Nozzle and head types Blue head 2-Head • 4-Head • Long distance •...
4MYH36100.book 16 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 LONG DISTANCE TYPE SPRAYER HOSE ROLLER JOINT CHEMICAL TANK SHUT-OFF VALVE BLUE HEAD / 2-HEAD / NOZZLE PIPE 4-HEAD TYPES ROLLER JOINT SHUT-OFF VALVE PRESSURE DIAL THROTTLE LEVER ENGINE SWITCH 4-HEAD NOZZLE SPRAYER HOSE NOZZLE PIPE NOZZLE HOLDER HOLDER BAND...
4MYH36100.book 17 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 CHEMICAL TANK TANK FILTER DRAIN CAP PUMP OIL INSPECTION WINDOW SHOULDER HARNESSES...
4MYH36100.book 18 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 FRAME SERIAL NUMBER FUEL RETURN TUBE STARTER GRIP CHOKE LEVER AIR CLEANER 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.
4MYH36100.book 19 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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 Throttle lever The throttle lever controls engine speed from SLOW to FAST, it will...
4MYH36100.book 20 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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...
4MYH36100.book 21 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 Shut-off valve Use the shut-off valve when spraying or stop spraying chemicals. LONG DISTANCE TYPE BLUE HEAD / 2-HEAD / 4-HEAD TYPES SHUT-OFF VALVE CLOSED SHUT-OFF OPEN VALVE CLOSED CLOSED CLOSED OPEN Nozzle handle (Long distance type only) Use the nozzle handle to adjust the spray angle and distance.
4MYH36100.book 22 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 23 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 24 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 Blue head / 2-head / 4-head types: Be sure to install packings and connect each part securely. a. Connect the sprayer hose into the roller joint. b. Connect the roller joint into the nozzle handle. c. Connect the nozzle handle into the shut-off valve. d.
4MYH36100.book 25 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 2. After assembling the nozzle and sprayer hose, connect the sprayer hose into the pump chamber. PUMP CHAMBER SPRAYER HOSE...
4MYH36100.book 26 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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 :CORRECT THROTTLE LEVER...
4MYH36100.book 27 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 28 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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).
4MYH36100.book 29 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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 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.
4MYH36100.book 31 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 32 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 4. Check the throttle cable free play. a. Remove the air cleaner cover (see page 31). 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.
4MYH36100.book 33 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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...
4MYH36100.book 34 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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. •...
4MYH36100.book 35 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 36 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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 BLUE HEAD NOZZLE...
4MYH36100.book 37 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 38 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 2. Turn the shut-off valve to the CLOSED position. LONG DISTANCE TYPE BLUE HEAD / 2-HEAD / 4-HEAD TYPES SHUT-OFF VALVE CLOSED SHUT-OFF VALVE CLOSED CLOSED CLOSED 3. To start a cold engine, move the choke lever to the CLOSED position.
4MYH36100.book 39 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 4. 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 5.
4MYH36100.book 40 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 7. 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.
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.
4MYH36100.book 42 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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. LONG DISTANCE TYPE BLUE HEAD / 2-HEAD / 4-HEAD TYPES SHUT-OFF VALVE...
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 35).
4MYH36100.book 44 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 4. Put the backpack sprayer on a flat table. 5. Make sure that the shoulder harness is not entangled with the throttle lever. :INCORRECT :CORRECT THROTTLE LEVER THROTTLE LEVER SHOULDER HARNESS SHOULDER HARNESS Then put the backpack sprayer on your back. •...
4MYH36100.book 45 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 6. Turn the shut-off valve to the OPEN position. LONG DISTANCE TYPE BLUE HEAD / 2-HEAD / 4-HEAD TYPES SHUT-OFF VALVE SHUT-OFF VALVE OPEN OPEN 7. Turn the pressure dial towards clockwise (HIGH) to make the spraying pressure suited for the operating conditions.
4MYH36100.book 46 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 8. 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.
4MYH36100.book 47 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 48 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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 42). 2. After the engine cooled, remove the drain cap to drain the agricultural chemicals from the chemical tank.
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.
(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.
4MYH36100.book 51 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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...
4MYH36100.book 52 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 53 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 54 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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. Dip in Oil Clean Squeeze and Dry Squeeze Do not twist.
4MYH36100.book 55 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 Spark plug service Recommended spark plug: CMR4H (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.
4MYH36100.book 56 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 57 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 58 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 59 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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...
4MYH36100.book 60 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 Refilling the pump grease to the Grease cup When the Grease cup has GREASE CUP turned till the end, refill both Grease cups with pump grease. 1. Remove the Grease cup by [LEFT SIDE] [RIGHT SIDE] turning counterclockwise.
4MYH36100.book 61 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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)
4MYH36100.book 62 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 63 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 Storage Before storing the backpack sprayer for an extended period; 1. Follow the procedures of “After operation” (see page 48). 2. To prevent the water from freezing in winter, drain the water completely from pump chamber. a.
4MYH36100.book 64 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 65 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 6. Lubricate the cylinder. a. Loosen the 4 mm hex. bolt, then remove the engine top cover (see page 55). b. Remove the spark plug (see page 56). c. Apply a couple of drops of clean engine oil into the cylinder. d.
4MYH36100.book 66 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 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.
4MYH36100.book 67 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 13. SPECIFICATIONS Frame Model WJR2525T1 Frame type Power products description WAET code 390 mm Length 415 mm Width 695 mm Height 12.0 kg Dry mass [weight] Chemical tank capacity 25 L *1 Without hose and nozzle *2 With pump oil Pump Model...
4MYH36100.book 68 ページ ２０１６年１０月１１日 火曜日 午後７時４７分 Engine Model GX25T Engine type 4-stroke, overhead cam, single cylinder Displacement 25.0 cm Bore×Stroke 35.0×26.0 mm Engine net power 0.72 kW (1.0 PS) (in accordance with SAE J1349*) /7,000 rpm Engine max. net torque 1.0 N·m (0.10 kgf·m) (in accordance with SAE J1349*) /5,000 rpm Cooling system...