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Honda WMP20X Owner's Manual

Honda owner's manual multi-purpose hump wmp20x
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  • Page 3 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.
  • Page 4 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.
  • Page 5 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.

  • Page 6: Table Of Contents

    CONTENTS Turn to the beginning of each section for a complete list of subjects. WATER PUMP SAFETY 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.
  • Page 7 PUMP SAFETY This section explains what you need to know to operate your multi-purpose pump safely. Safety Information Safety Label Locations...
  • Page 8 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.
  • Page 9 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. PUMP SAFETY...
  • Page 10 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.

  • Page 11: Controls

    CONTROLS This section shows you where controls are located and tells you what they do and how they work. Component Identification Controls Throttle lever Choke lever ... Fuel valve ... Ignition switch ... Oil Alert system Recoil starter CONTROLS...

  • Page 12: Component Identification

    CONTROLS Component Identification This identifies components and where to find the most frequently used controls. FUEL FILLER CAP FUEL VALVE 1 STARTER GRIP - ENGINE SERIAL NUMBER IGNITIOiiWITCH rnlMINQ I Cll DISCHARGE POR~~~~~~LEANER FRAME SERIAL NUMBER OIL DRAIN PLUG CAP/DIPSTICK...

  • Page 13: Controls

    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.

  • Page 14: Ignition Switch

    CONTROLS Ignition Switch The ignition switch allows the operator to start and stop the engine. Switch positions; OFF: To stop the engine. 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.

  • Page 15: Pre-Operation Check

    PRE-OPERATION CHECKS This section shows you how to check and prepare your pump for operation. Engine oil Fuel Refueling ..... 12 Fuel recommendations Oxygenated fuels .
  • Page 16 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.

  • Page 17: Fuel

    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. Stop the engine and keep heat, sparks, and flames away.
  • Page 18 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”...
  • Page 19 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.

  • Page 20: Air Cleaner

    PRE-OPERATION CHECKS Air cleaner 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.

  • Page 21: Operation

    High Elevation Operation At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug, cause hard starting and contribute to air pollution.
  • Page 23 PUMP OPERATION This section tells how to operate your pump safely and effective/y. Pump preparation Suction hose connection Discharge hose connection .., , ..19 Priming the pump ....19 Pump performance Starting the engine Stopping the engine...

  • Page 24: Pump Preparation

    PUMP OPERATION Pump Preparation Connect the Suction Hose Use a commercially available hose, hose connector, and hose clamps. The suction hose must be reinforced, non-collapsible wall or wire braided to prevent suction collapse. Keep the pump as close to the liquid to be pumped as possible.

  • Page 25: Priming The Pump

    Connect the Discharge Hose Use a commercially available hose, hose connector, and hose band. A short, large diameter hose will provide lower fluid friction and improve pump efficiency. A long or small diameter hose increases fluid friction and reduces pump output.
  • Page 26 PUMP OPERATION Liquid Recomendations The following tables contain a list of chemicals that the multi-purpose pump is capable of handling. The operator must verify that the liquid that is to be pumped is on this list. Chemicals can cause burns or serious injury. You can be burned or seriously injured if certain chemicals are allowed to contact your body.

  • Page 27: Pump Performance

    Pump Performance Pump discharge capacity is determined at 0 meters (0 ft) total head and at sea level. As the total head increases (discharge + suction head), pump discharge capacity will decrease. If the pump is used at higher elevations, pump discharge capacity will also decrease (see page 15).

  • Page 28: Starting The Engine

    PUMP OPERATION Starting the Engine 1. Turn the fuel valve to the ON position. Move the choke lever to the CLOSED position. Do not use the choke if the engine is warm or the ambient temperature is high. 3. Turn the ignition switch to the ON position.
  • Page 29 5. Pull the starter grip lightly until resistance is felt, then pull it briskly. Return the starter grip slowly back to the engine to prevent damage to the starter. 6. As the engine warms up, gradually open the choke to the OPEN position. Set the throttle at the desired speed to produce the best pumping...

  • Page 30: Stopping The Engine In An Emergency

    PUMP OPERATION Stopping the Engine In an emergency: To stop the engine in an emergency, turn the ignition switch to the OFF position. In normal use: 1. Move the throttle lever fully to the right to the position. IDLE 2. Turn the ignition switch to the OFF position.

  • Page 31: Maintenance

    MAINTENANCE This section tells you how to perform normal maintenance on your multi-purpose pump Maintenance Precautions Maintenance Schedule Engine Oil Change Air Cleaner Spark Plug Fuel Sediment Cup Fuel Filter Spark Arrester (optional part)
  • Page 32 MAINTENANCE Maintenance Precautions Periodic maintenance is necessary to keep your pump in good operating condition. Perform the service and inspection at the intervals shown in the Maintenance Schedule (p. 27). Use only genuine HONDA parts or their equivalent for maintenance or repair. Replacement parts which are not of equivalent quality may damage the pump.
  • Page 33 See the Honda WMP20X Multi-purpose Pump Shop Manual. (3) The spark arrester is an optional part and does not come standard on the WMP20X Multi-purpose Pump. Before First Every M;th...
  • Page 34 MAINTENANCE Engine Oil Change Drain the oil while the engine is warm to assure rapid and complete draining. 1. Remove the oil filler cap, drain plug and sealing washer to drain the oil. Drain into a suitable container. 2. Reinstall the drain plug and sealing washer. Tighten the plug securely.
  • Page 35 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 generator in extremely dusty areas. p7iEE-l Never run the pump without the air cleaner. Rapid engine wear will result.
  • Page 36 MAINTENANCE 5. Foam element cleaning: Wash the‘element in a solution of household detergent and warm water, then rinse thoroughly, or wash in nonflammable or high flash point solvent. Gasoline is highly flammable and explosive. You can be burned or seriously hurt. Never use gasoline to clean parts.
  • Page 37 Spark Plug Service Recommended spark plugs: BPRGES (NGK), W20EPFbU (ND) To ensure proper engine operation, the spark plug must be properly gapped and free of deposits. Allow the engine to cool before servicing the spark plug. 1. Remove the spark Plug Cap- 2.
  • Page 38 MAINTENANCE 6. Check that the spark plug washer is in good condition, and thread the spark plug in by hand to prevent cross-threading. 7. After the spark plug is seated, tighten with a spark plug wrench to compress the washer. If installing a new spark plug, tighten 112 turn after the spark plug seats to compress the washer.
  • Page 39 Fuel Filter 1. Drain the fuel into a suitable container and remove the gas tank. 2. Disconnect the fuel line, and unscrew the fuel filter from the tank. 3. Clean the filter with nonflammable solvent, and check that the filter screen is undamaged. Replace as necessary. 4.
  • Page 40 MAINTENANCE Spark Arrester (optional part) Allow the muffler to completely cool before proceeding. 1. Remove the two 8 mm nuts 0 and remove the muffler from the cylinder. 2. Remove the four 5 mm screws Q from the muffler protector 0 and remove the muffler protector.

  • Page 41: Transporting/Storage

    TRANSPORTING/STORAGE TRANSPORTING/STORAGE This sections tells you how to safely transport your pump and how to properly store it. Transporting Storage...
  • Page 42 TRANSPORTING/STORAGE Transporting When transporting the pump, be sure to keep it upright. If the pump is tilted or overturned, fuel may spill from the tank, which can result in a fire hazard. Allow the engine to cool before transporting the pump. 1.
  • Page 43 Storage Before storing your pump for an extended period: 1. Be sure the storage area is free of excessive humidity and dust. 2. Clean the pump interior by removing the pump drain plug PLUG and flushing with fresh water. After flushing, drain the water from the pump housing.
  • Page 44 TRANSPORTING/STORAGE 4. Drain the carburetor bowl. a. With the fuel valve OFF, remove the carburetor drain screw. b. Drain the gasoline from the carburetor into a suitable container. c. If the tank is to be drained, turn the fuel valve ON and drain the fuel in the tank into a suitable container.
  • Page 45 6. Change the engine oil (see page 28). 7. Remove the spark plug, and pour about a tablespoon of clean engine oil into the cylinder. Crank the engine several revolutions to distribute the oil, then reinstall the spark plug. Pull the starter rope slowly until resistance is felt. Continue pulling until the arrow notch on the starter pulley aligns with the hole on the recoil starter (see illustration below).

  • Page 47: Troubleshooting

    TROUBLESHOOTING This section tells you what to look for if you encounter problems. Engine Pump TROUBLESHOOTING...
  • Page 48 TROUBLESHOOTING Engine If the engine will not start: 1. Is the ignition switch ON? 2. Is there enough fuel? 3. Is the fuel valve ON? 4. Is gasoline reaching the carburetor? To check, remove the float bowl drain screw and turn the fuel valve ON.
  • Page 49 Pump If the pump does not pump water: 1. Is the pump fully primed (see p. 19)? 2. Is the strainer clogged? 3. Are the suction hose bands installed securely (see p. 18)? 4. Is the suction hose connector washer installed (see p. 18)? 5.

  • Page 51: Specifications

    SPECIFICATIONS This section provides you with important dimensions and capacities. WMPZOX Engine Pump Pump Performance Curve Wiring Diagram SPECIFICATIONS...
  • Page 52 SPECIFICATIONS WMP20X and Weight Dimension Length x Width x Height Dry Weight Enaine Engine Type Displacement [bore x stroke] Maximum output Cooling system Ignition system PTO shaft direction 520 x 400 x 450 min (20.5 x 15.7 x 17.7 in) 25.5 kg (56.2 Ibs)
  • Page 53 Pump Suction port diameter Discharge port diameter Rated rpm (maximum load) Total head Suction head Max discharge capacity Self-priming time Continuous running time Pump Performance Curve This graph shows the relationship between the pump discharge capacity and the total head. As you increase the total head, DISCHARGE 2 hrs 15 min...
  • Page 54 SPECIFICATIONS Wiring Diagram...

  • Page 55: Additional Information

    Additional Information This section gives you sources for more information about your pump. Honda Publications Customer Service Information Additional Information...
  • Page 56 Additional Information Honda Publications These publications will give you additional information about maintaining your pump. You may order them from your Honda water pump dealer. Shop Manual This manual covers complete maintenance and overhaul procedures, It is intended to be used by a skilled technician. Parts Catalog This provides a complete pictorial parts listing.
  • Page 57 CUSTOMER SERVICE INFORMATION Honda power equipment dealership personnel are trained professionals. They should be able to answer any question you may have. If you encounter a problem that your dealer does not solve to your satisfaction, please discuss it with the dealership’s management.

  • Page 59: Index

    INDEX Air Cleaner Clean Inspect Choke Lever Component Location ... Controls ... Customer Service Discharge Hose Engine Oil Change Check Engine Specifications ... Engine Troubleshooting Fuel Oxygenated Recommendation Refueling Fuel Filter, Cleaning Fuel Sediment Cup, Cleaning Fuel Valve Head (Suction, Discharge, Total) ... High Elevation Operation ...
  • Page 60 INDEX Ignition Switch Liquid Pumping Recommendations Maintenance Precautions Maintenance Schedule ..Oil Alert System Oil, Engine Change ... . . Check ,.., ..Pre-Operation Checks Publications ...
  • Page 61 Safety Operating ....2 Maintenance Spark Arrester ....34 Spark Plug ....31 Specifications .

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