Honda WL20XH Owner's Manual
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Honda WL20XH Owner's Manual

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42YG7X010.book Page 0 Thursday, September 28, 2017 6:19 PM
Keep this owner's manual handy so you can refer to it at any time.
This owner's manual is considered a permanent part of the water pump
and should remain with the water pump if resold.
The information and specifications included in this publication were in
effect at the time of approval for printing. Honda Motor Co., Ltd.
reserves the right, however, to discontinue or change specifications or
design at any time without notice and without incurring any obligation
whatever.

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  • Page 1 The information and specifications included in this publication were in effect at the time of approval for printing. Honda Motor Co., Ltd. reserves the right, however, to discontinue or change specifications or design at any time without notice and without incurring any obligation whatever.
  • Page 2 42YG7X010.book Page 1 Thursday, September 28, 2017 6:19 PM INTRODUCTION Congratulations on your selection of a Honda water pump. We are certain you will be pleased with your purchase of one of the finest water pumps on the market. We want to help you get the best results from your new water pump and to operate it safely.
  • Page 3 42YG7X010.book Page 2 Thursday, September 28, 2017 6:19 PM INTRODUCTION A FEW WORDS ABOUT SAFETY Your safety and the safety of others are very important. And using this water pump safely is an important responsibility. To help you make informed decisions about safety, we have provided operating procedures and other information on labels and in this manual.

  • Page 4: Table Of Contents

    42YG7X010.book Page 3 Thursday, September 28, 2017 6:19 PM CONTENTS PUMP SAFETY................5 IMPORTANT SAFETY INFORMATION ......... 5 SAFETY LABEL LOCATION............7 CONTROLS & FEATURES ............. 8 COMPONENT & CONTROL LOCATIONS........8 CONTROLS ................10 Fuel Valve Lever ..............10 Engine Switch..............
  • Page 5 42YG7X010.book Page 4 Thursday, September 28, 2017 6:19 PM CONTENTS AIR CLEANER CLEANING ............34 SPARK PLUG SERVICE............36 STORAGE................. 38 STORAGE PREPARATION............38 Cleaning................38 Fuel................... 40 Engine Oil................42 STORAGE PRECAUTIONS ............42 REMOVAL FROM STORAGE ............ 43 TRANSPORTING ...............

  • Page 6: Pump Safety

    PUMP SAFETY IMPORTANT SAFETY INFORMATION Honda WL20XH and WL30XH pumps are designed to pump only fresh water that is not intended for human consumption, and other uses can result in injury to the operator or damage to the pump and other property.
  • Page 7 42YG7X010.book Page 6 Thursday, September 28, 2017 6:19 PM PUMP SAFETY Hot Exhaust The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Be careful not to touch the muffler while it is hot. Let the engine cool before transporting the pump or storing it indoors.

  • Page 8: Safety Label Location

    This label is considered a permanent part of your pump. If the label comes off or becomes hard to read, contact an authorized Honda servicing dealer for a replacement. Component with high temperature. Please do not touch it.

  • Page 9: Controls & Features

    42YG7X010.book Page 8 Thursday, September 28, 2017 6:19 PM CONTROLS & FEATURES COMPONENT & CONTROL LOCATIONS <WL20XH> THROTTLE LEVER DISCHARGE PORT FUEL FILLER CAP CHOKE LEVER HOSE CLAMP FUEL VALVE LEVER OIL FILLER CAP/ DIPSTICK STARTER GRIP ENGINE SWITCH STRAINER...
  • Page 10 42YG7X010.book Page 9 Thursday, September 28, 2017 6:19 PM CONTROLS & FEATURES <WL30XH> THROTTLE LEVER DISCHARGE PORT FUEL FILLER CAP CHOKE LEVER HOSE CLAMP FUEL VALVE LEVER OIL FILLER CAP/ DIPSTICK STARTER GRIP ENGINE SWITCH STRAINER PRIMING WATER FRAME FILLER CAP MUFFLER AIR CLEANER HOSE CLAMP...

  • Page 11: Controls

    42YG7X010.book Page 10 Thursday, September 28, 2017 6:19 PM CONTROLS & FEATURES CONTROLS Fuel Valve Lever The fuel valve opens and closes FUEL VALVE LEVER the passage between the fuel tank and the carburetor. The fuel valve lever must be in the ON position for the engine to run.

  • Page 12: Choke Lever

    42YG7X010.book Page 11 Thursday, September 28, 2017 6:19 PM CONTROLS & FEATURES Choke Lever The choke lever opens and closes CHOKE LEVER the choke valve in the carburetor. The CLOSED position enriches the fuel mixture for starting a cold engine. The OPEN position provides the OPEN correct fuel mixture for operation...

  • Page 13: Starter Grip

    42YG7X010.book Page 12 Thursday, September 28, 2017 6:19 PM CONTROLS & FEATURES Starter Grip Pulling the starter grip operates the recoil starter to crank the engine for starting. STARTER GRIP FEATURES Oil Alert System The Oil Alert system is designed to prevent engine damage caused by an insufficient amount of oil in the crankcase.

  • Page 14: Before Operation

    42YG7X010.book Page 13 Thursday, September 28, 2017 6:19 PM BEFORE OPERATION ARE YOU READY TO GET STARTED? Your safety is your responsibility. A little time spent in preparation will significantly reduce your risk of injury. Knowledge Read and understand this manual. Know what the controls do and how to operate them.

  • Page 15: Is Your Pump Ready To Go

    42YG7X010.book Page 14 Thursday, September 28, 2017 6:19 PM BEFORE OPERATION IS YOUR PUMP READY TO GO? For your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate the pump to check its condition.

  • Page 16: Check The Suction And Discharge Hoses

    42YG7X010.book Page 15 Thursday, September 28, 2017 6:19 PM BEFORE OPERATION Check the Suction and Discharge Hoses • Check the general condition of the hoses. Be sure the hoses are in serviceable condition before connecting them to the pump. Remember that the suction hose must be reinforced construction to prevent hose collapse.

  • Page 17: Operation

    42YG7X010.book Page 16 Thursday, September 28, 2017 6:19 PM OPERATION SAFE OPERATING PRECAUTIONS To safely realize the full potential of this pump, you need a complete understanding of its operation and a certain amount of practice with its controls. Before operating the pump for the first time, please review the IMPORTANT SAFETY INFORMATION on page 5 and the chapter titled BEFORE OPERATION (see page 13).

  • Page 18: Pump Placement

    42YG7X010.book Page 17 Thursday, September 28, 2017 6:19 PM OPERATION PUMP PLACEMENT For best pump performance, place the pump near the water level, and use hoses that are no longer than necessary. That will enable the pump to produce the greatest output with the least self priming time. As head (pumping height) increases, pump output decreases.

  • Page 19: Suction Hose Installation

    The suction hose must be reinforced with a noncollapsible wall or braided wire construction. Do not use a hose smaller than the pump’s suction port size. Minimum hose size: WL20XH=50 mm WL30XH=80 mm The suction hose should be no longer than necessary. Pump performance is best when the pump is near the water level and the hoses are short.

  • Page 20: Discharge Hose Installation

    42YG7X010.book Page 19 Thursday, September 28, 2017 6:19 PM OPERATION DISCHARGE HOSE INSTALLATION HOSE CONNECTOR Use a commercially available hose HOSE CLAMP and hose connector, and clamp provided with the pump. It is best to use a short, large-diameter hose, because that will reduce fluid friction and improve pump output.

  • Page 21: Starting The Engine

    42YG7X010.book Page 20 Thursday, September 28, 2017 6:19 PM OPERATION STARTING THE ENGINE 1.Prime the pump (see page 19). 2.Move the fuel valve lever to the ON position. FUEL VALVE LEVER 3.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.
  • Page 22 42YG7X010.book Page 21 Thursday, September 28, 2017 6:19 PM OPERATION 5.Turn the engine switch to the ON position. ENGINE SWITCH 6.Pull the starter grip lightly until you feel resistance, then pull briskly in the direction of the arrow as shown below. Do not allow the starter grip to snap back against the engine.

  • Page 23: Setting Engine Speed

    42YG7X010.book Page 22 Thursday, September 28, 2017 6:19 PM OPERATION 7.If the choke lever was moved to the CLOSED position to start the engine, gradually move it to the OPEN position as the engine warms CHOKE LEVER OPEN SETTING ENGINE SPEED After starting the engine, move the throttle lever to the FAST position for self-priming, and check pump output.

  • Page 24: Stopping The Engine

    42YG7X010.book Page 23 Thursday, September 28, 2017 6:19 PM OPERATION 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.Move the throttle lever to the SLOW position. THROTTLE LEVER SLOW 2.Turn the engine switch to the OFF position.
  • Page 25 42YG7X010.book Page 24 Thursday, September 28, 2017 6:19 PM OPERATION 3.Turn the fuel valve lever to the OFF position. FUEL VALVE LEVER After use, remove the pump drain cap (see page 39), and drain the pump chamber. Remove the priming water filler cap, and flush the pump chamber with clean, fresh water.

  • Page 26: Servicing Your Pump

    Remember that an authorized Honda servicing dealer knows your pump best and is fully equipped to maintain and repair it. To ensure the best quality and reliability, use only new, Honda Genuine parts or their equivalents for repair and replacement.

  • Page 27: Maintenance Safety

    42YG7X010.book Page 26 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP MAINTENANCE SAFETY Some of the most important safety precautions follow. However, we cannot warn you of every conceivable hazard that can arise in performing maintenance. Only you can decide whether or not you should perform a given task.

  • Page 28: Maintenance Schedule

    (2) (1) Service more frequently when used in dusty areas. (2) These items should be serviced by your Honda servicing dealer, unless you have the proper tools and are mechanically proficient. Refer to the Honda shop manual for service procedures.

  • Page 29: Refueling

    42YG7X010.book Page 28 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP REFUELING With the engine stopped and on a level surface, remove the fuel filler cap and check the fuel level. Refill the tank if the fuel level is low. Gasoline is highly flammable and explosive.

  • Page 30: Fuel Recommendation

    42YG7X010.book Page 29 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP Never refuel the engine inside a building where gasoline fumes may reach flames or sparks. Keep gasoline away from appliance pilot lights, barbecues, electric appliances, power tools, etc. Spilled fuel is not only a fire hazard, it causes environmental damage.

  • Page 31: Engine Oil Level Check

    42YG7X010.book Page 30 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP ENGINE OIL LEVEL CHECK Check the engine oil level with the engine stopped and in a level position. 1.Remove the oil filler cap/dipstick and wipe it clean. 2.Insert and remove the dipstick without screwing it into the filler neck.

  • Page 32: Engine Oil Change

    42YG7X010.book Page 31 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP ENGINE OIL CHANGE Drain the used oil while the engine is warm. Warm oil drains quickly and completely. 1.Place a suitable container below the engine to catch the used oil, then remove the oil filler cap/dipstick, drain bolt and sealing washer.

  • Page 33: Engine Oil Recommendation

    AMBIENT TEMPERATURE The SAE oil viscosity and service category are in the API label on the oil container. Honda recommends that you use API service category SE or later (or equivalent) oil.

  • Page 34: Air Cleaner Inspection

    42YG7X010.book Page 33 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP AIR CLEANER INSPECTION Unscrew the wing nut and remove the air cleaner cover. Check the filter elements to be sure they are clean and in good condition. If the filter elements are dirty, clean or replace them as described on page 34.

  • Page 35: Air Cleaner Cleaning

    42YG7X010.book Page 34 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP AIR CLEANER CLEANING Dirty filter elements will restrict air flow to the carburetor, reducing engine performance. If you operate the pump in very dusty areas, clean the filter elements more frequently than specified in the MAINTENANCE SCHEDULE (see page 27).
  • Page 36 42YG7X010.book Page 35 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP 2.Clean the air filter elements if they are to be reused. Paper filter element: Tap the filter element several times on a hard surface to remove dirt, or blow compressed air [not exceeding 207 kPa (2.1 kgf/cm )] through the filter element from the inside.

  • Page 37: Spark Plug Service

    42YG7X010.book Page 36 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP SPARK PLUG SERVICE In order to service the spark plug, you will need a spark plug wrench (commercially available). Recommended spark plug: BPR6ES (NGK) W20EPR-U (DENSO) Incorrect spark plugs can cause engine damage. 1.Disconnect the spark plug cap, and remove any dirt from around the spark plug area.
  • Page 38 42YG7X010.book Page 37 Thursday, September 28, 2017 6:19 PM SERVICING YOUR PUMP 5.Install the spark plug carefully, by hand, to avoid cross threading. 6.After the spark plug seats, tighten with a spark plug wrench to compress the washer. If reinstalling the used spark plug, tighten 1/8–1/4 turn after the spark plug seats.

  • Page 39: Storage

    42YG7X010.book Page 38 Thursday, September 28, 2017 6:19 PM STORAGE STORAGE PREPARATION Proper storage preparation is essential for keeping your pump trouble-free and looking good. The following steps will help to keep rust and corrosion from impairing your pump’s function and appearance, and will make the engine easier to start when you use the pump again.
  • Page 40 42YG7X010.book Page 39 Thursday, September 28, 2017 6:19 PM STORAGE 4.Stop the engine, and allow it to cool. 5.Remove the pump drain cap, and flush the pump with clean, fresh water. Allow the water to drain from the pump chamber, then reinstall the drain cap.

  • Page 41: Fuel

    42YG7X010.book Page 40 Thursday, September 28, 2017 6:19 PM STORAGE Fuel Depending on the region where you operate your equipment, fuel formulations may deteriorate and oxidize rapidly. Fuel deterioration and oxidation can occur in as little as 30 days and may cause damage to the carburetor and/or fuel system.
  • Page 42 42YG7X010.book Page 41 Thursday, September 28, 2017 6:19 PM STORAGE Draining the Fuel Tank and Carburetor Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel. • Keep heat, sparks, and flame away. • Handle fuel only outdoors. •...

  • Page 43: Engine Oil

    42YG7X010.book Page 42 Thursday, September 28, 2017 6:19 PM STORAGE Engine Oil 1.Change the engine oil (see page 31). 2.Remove the spark plug (see page 36). 3.Pour a tablespoon (5–10 cm /5–10 cc) of clean engine oil into the cylinder. 4.Pull the starter grip several times to distribute the oil in the cylinder.

  • Page 44: Removal From Storage

    42YG7X010.book Page 43 Thursday, September 28, 2017 6:19 PM STORAGE Place the pump on a level surface. Tilting can cause fuel or oil leakage. With the engine and exhaust system cool, cover the pump to keep out dust. A hot engine and exhaust system can ignite or melt some materials.

  • Page 45: Transporting

    42YG7X010.book Page 44 Thursday, September 28, 2017 6:19 PM TRANSPORTING If the pump has been running, allow the engine to cool for at least 15 minutes before loading the pump on the transport vehicle. A hot engine and exhaust system can burn you and can ignite some materials. Keep the pump level when transporting to reduce the possibility of fuel leakage.

  • Page 46: Taking Care Of Unexpected Problems

    Spark plug wet with fuel (flooded engine). Dry and install spark plug. Start engine with throttle lever in FAST position. Carburetor malfunction, ignition Take engine to an authorized Honda malfunction, valves stuck, etc. servicing dealer, or refer to shop manual.

  • Page 47: Pump

    42YG7X010.book Page 46 Thursday, September 28, 2017 6:19 PM TAKING CARE OF UNEXPECTED PROBLEMS PUMP No Pump Output Possible Cause Correction Pump not primed. Prime pump (p. 19) Hose collapsed, cut or puctured. Replace suction hose (p. 18). Strainer not completely underwater. Sink the strainer and the end of the suction hose completely underwater.

  • Page 48: Technical Information

    42YG7X010.book Page 47 Thursday, September 28, 2017 6:19 PM TECHNICAL INFORMATION SERIAL NUMBER LOCATION <WL20XH> <WL30XH> ENGINE SERIAL NUMBER <Example: WL20XH> Machine Environmental Identification Number Display method: Marking Sample:*644620160H2000001* FRAME SERIAL NUMBER Record the engine and frame serial numbers and date purchased in the spaces below.

  • Page 49: Carburetor Modification For High Altitude Operation

    42YG7X010.book Page 48 Thursday, September 28, 2017 6:19 PM TECHNICAL INFORMATION CARBURETOR MODIFICATION FOR HIGH ALTITUDE 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 and cause hard starting. Operation at an altitude that differs from that at which this engine was certified, for extended periods of time, may increase emissions.

  • Page 50: Specifications

    42YG7X010.book Page 49 Thursday, September 28, 2017 6:19 PM TECHNICAL INFORMATION SPECIFICATIONS WL20XH Dimensions and weight Length 490 mm Width 385 mm Height 410 mm Dry mass [weight] 24 kg Engine design and performance Model GP160 Engine type 4-stroke, overhead valve, single cylinder...
  • Page 51 42YG7X010.book Page 50 Thursday, September 28, 2017 6:19 PM TECHNICAL INFORMATION WL20XH (continued) Pump Suction port diameter 50 mm Discharge port diameter 50 mm Total head (maximum) 22.8 m Suction head (maximum) Discharge capacity (maximum) 25.2 m per hour Self-priming time...
  • Page 52 42YG7X010.book Page 51 Thursday, September 28, 2017 6:19 PM TECHNICAL INFORMATION WL30XH Dimensions and weight Length 510 mm Width 385 mm Height 435 mm Dry mass [weight] 25 kg Engine design and performance Model GP160 Engine type 4-stroke, overhead valve, single cylinder Displacement 163 cm [Bore×Stroke]...
  • Page 53 42YG7X010.book Page 52 Thursday, September 28, 2017 6:19 PM TECHNICAL INFORMATION WL30XH (continued) Pump Suction port diameter 80 mm Discharge port diameter 80 mm Total head (maximum) 15.8 m Suction head (maximum) Discharge capacity (maximum) 39.6 m per hour Self-priming time 150 seconds (maximum) at 5 m Continuous running time Approximately 1 h 54 min...

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