makita EW2050H 4 Stroke Self Priming Centrifugal Water Pump Instruction Manual

makita EW2050H 4 Stroke Self Priming Centrifugal Water Pump

Product Information

The product is a MAKITA PUMP available in four different models: EW2050H, EW2051H, EW3050H, and EW3051H. The product manual is available in multiple languages including English, German, French, Italian, Dutch, Spanish, Danish, Greek, Turkish, Polish, Hungarian, Slovak, Czech, Slovenian, Albanian, Bulgarian, Croatian, Macedonian, Romanian, Serbian, Russian, and Ukrainian. The manual provides information on the product’s specifications, safety precautions, and maintenance procedures.

Product Usage Instructions

1. Read the manual carefully before operating the pump.
2. Familiarize yourself with the proper operation and maintenance procedures to ensure safe and efficient use of the product.
3. Keep the owner’s manual at hand for future reference.
4. Do not inhale exhaust gases. They contain carbon monoxide which can cause unconsciousness or death.
5. Do not operate the pump indoors or in a poorly ventilated area.
6. Exercise extreme care when operating the pump near people or animals.
7. Keep the exhaust pipe free of foreign objects.
8. Be cautious while refueling as fuel is extremely flammable and its vapors can explode if ignited.
9. Do not refuel indoors or in a poorly ventilated area.
10. Stop the pump prior to refueling.
11. Do not remove fuel tank cap nor fill fuel tank while engine is hot or running. Allow engine to cool at least 2 minutes before refueling.
12. Do not overfill the fuel tank.
13. If fuel is spilt, wipe it away carefully and wait until the fuel has dried before starting the engine.
14. After refueling, make sure that the fuel cap is secured to prevent spillage.

FOREWORD

• Thank you very much for purchasing a MAKITA PUMP.
• This manual covers operation and maintenance of MAKITA PUMP.
• All information in this publication is based on the latest product information available at the time of approval for printing. Please read this manual carefully before operating.
• Please take a moment to familiarize yourself with the proper operation and maintenance procedures in order to maximize the safe and efficient use of this product.
• Keep this owner’s manual at hand, so that you can refer to it at any time.
• Due to constant efforts to improve our products, certain procedures and specifications are subjected to change without notice.
• When ordering spare parts, always give us the MODEL, PRODUCTION NUMBER and SERIAL NUMBER of your pump.
• Please fill in the following blanks after checking the production number on your pump. (Location of label is different depending on the product specification.)

NOTE
Please refer to the illustrations on the back page of the front cover for Fig.1 to 8 indicated in the sentence.

SAFETY PRECAUTIONS

Please make sure you review each precaution carefully.
Pay special attention to statement preceded by the following words.

“WARNING” indicates a strong possibility of severe personal injury or loss of life if instructions are not followed.
“CAUTION” indicates a possibility of personal injury or equipment damage if instructions are not followed.

WARNING: EXHAUST PRECAUTIONS

• Never inhale exhaust gasses.
• They contain carbon monoxide, a colorless, odorless and extremely dangerous gas which can cause unconsciousness or death.
• Never operate the pump indoors or in a poorly ventilated area, such as tunnel, cave, etc.
• Exercise extreme care when operating the pump near people or animals.
• Keep the exhaust pipe free of foreign objects.

WARNING: REFUELING PRECAUTIONS

• Fuel is extremely flammable and its vapors can explode if ignited.
• Do not refuel indoors or in a poorly ventilated area.
• Be sure to stop the pump prior to refueling.
• Do not remove fuel tank cap nor fill fuel tank while engine is hot or running. Allow engine to cool at least 2 minutes before refueling.
• Do not overfill the fuel tank.
• If fuel is spilt, wipe it away carefully and wait until the fuel has dried before starting the engine.
• After refueling, make sure that the fuel cap is secured to prevent spillage. WARNING : FIRE PREVENTION
• Do not operate the pump while smoking or near an open flame.
• Do not use around dry bush, twigs, cloth rags, or other flammable materials.
• Keep cooling air intake (recoil starter area) and muffler side of the engine at least 1 meter (3 feet) away from buildings, obstructions and other burnable objects.
• Keep the pump away from flammables and other hazardous materials (trash, rags, lubricants, explosives).

WARNING: OTHER SAFETY PRECAUTIONS

• Do not allow drunk driving.

• Be careful of hot parts.
  The muffler and other engine parts become very hot while the pump is running or just after it has stopped. Operate the pump in a safe area and keep children away from the running pump.

• Do not touch the ignition cable when starting and operating the engine.

• Operate the pump on a stable, level surface.
  If the engine is tilted, fuel spillage may result.
  NOTE
  Operating the pump at a steep incline may cause seizure due to improper lubrication even with a maximum oil level.

•  Do not transport the pump with fuel in tank or with fuel strainer valve open.

• Keep the unit dry (do not operate it in rainy conditions).

WARNING: PRE-OPERATION CHECKS

• Carefully check fuel hoses and joints for looseness and fuel leakage. Leaked fuel creates a potentially dangerous situation.
• Check bolts and nuts for looseness. A loose bolt or nut may cause serious engine trouble.
• Check the engine oil and refill if necessary.
• Check the fuel level and refill if necessary. Take care not to overfill the tank.
• Keep cylinder fins and recoil starter free of dirt, grass and other debris.
• Wear snug fitting working clothes when operating the engine.
  Loose aprons, towels, belt, etc., may be caught in the engine or drive train, causing a dangerous situation.

CAUTION: BEWARE OF WATER-HAMMERING

Do not allow the delivery hose to be trampled over by a vehicle’ s wheel, or do not close the delivery valve abruptly otherwise a water-hammer occurs which may result heavy damage to the pump.

SYMBOLS

COMPONENTS

(See Fig. 1)

NOTE Please refer to the illustrations on the back page of the front cover or back cover for Fig.1 to 8 indicated in the sentence.

1. Plug (drain)

2. Suction

3. Delivery

4. Frame

5. Plug (priming)

6. Muffler

7. Spark plug

8. Oil filler (with oil guage)

9. Fuel tank

10. Casing cover

11. Drain plug (at two places)

12. Stop Switch

13. Recoil starter

14. Recoil Starter handle

15. Fuel valve

16. Chocke lever

17. Air cleaner

18. Speed control lever

19. Strainer

20. Hose coupling

21. Hose band

22. Tools

23. Instruction for use
    (This publication)

24. Hexagon wrench
    (Semi trash pump only)

PRE-OPERATION FOR STARTING

(See Fig.2 )
CONNECT SUCTION HOSE (See Fig.2 -1 )
Use a reinforced-wall or wire braided hose to prevent suction collapse. Since the pump self-priming time is directly proportional to hose length, a short hose is recommended.

CAUTION
Always use a strainer with the suction hose. Gravel or debris sucked into the pump will cause serious damage to the impeller and the pump casing.

CONNECT DELIVERY HOSE (See Fig.2 -2 )
When using a fabric hose, always use a hose band to prevent the hose from disconnecting under high pressure.

CHECK ENGINE OIL (See Fig.2 -4 )
Before checking or refilling engine oil, be sure the engine is located on stable, level surface and stopped.

• Do not screw the oil gauge into the oil filler neck to check oil level. If the oil level is low, refill to the upper level with the following recommended oil.
• Use 4-stroke automotive detergent oil of API service class SE or higher grade (SG, SH or SJ is recommended).
• Select the viscosity based on the air temperature at the time of operation as shown in the table. (See Fig.2 -3 )

Explanation of Fig.2 -4

1. Oil Gauge
2. Upper Level
3. Lower Level

CHECK FUEL (See Fig. 2- 5)

WARNING

• Do not refuel while smoking, near an open flame or other such potential fire hazards.
  Otherwise fire accident may occur.

• Remove the statistic electricity from your body before refilling the gasoline. Sparking from electrostatic discharge may cause the ignition to the vaporized fuel (gasoline) resulting burns.
  Static electricity can be discharged from the body by touching by hand the metal parts of the unit and the fuel dispensing pump.

NOTE
THIS ENGINE IS CERTIFIED TO OPERATE ON AUTOMOTIVE UNLEADED GASOLINE.

• Stop the engine and open the cap.
• Use automotive unleaded gasoline only.
• Unleaded regular/premium or reformulated gasoline containing no more than 10% Ethanol (E10), or 15% MTBE may also be used.
• Never use gasoline containing ethanol exceeding 10%, or MTBE exceeding 15% because engine or fuel system damage could result.
• Never use stale or contaminated gasoline.
• Use of these non-recommended fuels may result in reduced performance and/or denial of warranty.

Fuel Tank Capacity

• Close the fuel valve before filling the fuel tank.
• Do not fill above the top of the fuel filter screen (marked ), or the fuel may overflow when it heats up later and expands.

Explanation of Fig.2 -5

Maximum Fuel level

• When filling the fuel tank, always use the fuel filter screen.
• Reattach the fuel cap by turning clockwise until reaching the physical stop (about one quarter turn). Do not attempt to turn past the physical stop or the fuel cap may be damaged.
• Wipe off any spilled fuel before starting the engine. (See Fig.2 -8 )

CHECK PRIMING WATER (See Fig. – )
It is recommended that the water chamber of pump casing should be primed with full of water before operating.

WARNING
Never attempt to operate the pump without priming water or the pump will overheat. Extended dry operation will destroy the mechanical seal. If the unit has been operated dry, stop the engine immediately and allow the pump to cool before adding priming water.

OPERATING YOUR PUMP

STARTING (See Fig. 3)

1. Open the fuel valve. (See Fig.3 -1 )

2. Turn the STOP SWITCH to the position “ I ” (ON). (See Fig. 3-2 )

3. Set the speed control lever 1/3 of the way towards the high speed position. (See Fig.3 – 3)

4. Close the choke lever. (See Fig. 3-4 )
   If the engine is cold or the ambient temperature is low, close the choke lever fully.
   If the engine is warm or the ambient temperature is high, open the choke lever half-way, or keep it fully open.

5. Pull the starter handle slowly until resistance is felt.
   This is the “compression” point. Return the handle to its original position and pull swiftly. Do not pull out the rope all the way. After starting the engine, allow the starter handle to return to its original position while still holding the handle. (See Fig.3 -5 )

6. After starting the engine, gradually open choke by turning the choke lever and finally keep it fully opened. Do not fully open the choke lever immediately when the engine is cold or the ambient temperature is low, because the engine may stop. (See Fig. 3-6 )

RUNNING (See Fig. 4)

1. After the engine starts, set the speed control lever at the low speed position (L) and warm it up without load for a few minutes. (See Fig.4 – 1)
2. Gradually move the speed control lever toward the high speed position (H) and set it at the required engine speed. (See Fig.4 -2 )
   Whenever high speed operation is not required, slow the engine down (idle) by moving the speed control lever to save fuel and extend engine life.

STOPPING (See Fig. 5)

1. Set the speed control lever at the low speed position and allow the engine to run at low speed for 1 or 2 minutes before stopping. (See Fig.5 – 1)
2. Turn the STOP SWITCH counterclockwise to the position “ ” (OFF). (See Fig.5 – 2)
3. Close the fuel valve. (See Fig.5 -3 )
4. Pull the starter handle slowly and return the handle to its original position when resistance is felt. This operation is necessary to prevent outside moist air from intruding into the combustion chamber. (See Fig.5 -4 )

STOPPING ENGINE WITH THE FUEL VALVE
Close the fuel valve and wait for a while until the engine stops. Avoid to let the fuel remain in the carburetor over long periods, or the passages of the carburetor may become clogged with impurities, and malfunctions may result.

MAINTENANCE

(See Fig. 6)

1. DAILY INSPECTION

• Before running the engine, check the following service items.
• Loose or broken bolts and nuts
• Clean air cleaner element
• Enough clean engine oil
• Leakage of gasoline and engine oil
• Enough gasoline
• Safe surroundings
• Check the priming water
• Excessive vibration, noise

PERIODIC INSPECTION

• Periodic maintenance is vital to the safe and efficient operation of your pump.
• Check the table below for periodic maintenance intervals.
• The below chart is based on the normal product operation schedule.

CAUTION
Replace rubber pipes for fuel passage every two years. If fuel leakage is found, replace the pipe immediately.

Periodic Maintenance Schedule table

INSPECTING THE SPARK PLUG
(See Fig. 7- 1)

1.  Clean off carbon deposits on the spark plug electrode using a plug cleaner or wire brush.
2.  Check electrode gap. The gap should be 0.6 mm to 0.7 mm (0.02 inch.-0.03 inch.).
   Adjust the gap, if necessary, by carefully bending the side electrode.

Recommended Spark Plug:
E6RC (TORCH) or BR-6HS (NGK)

ENGINE OIL CHANGE (See Fig.7 -2 ,3 )
Initial oil change : After 20 hours of operation
Thereafter : Every 100 hours of operation

When changing oil, stop the engine and loosen the drain plug. Drain the used oil while the engine is warm. Warm oil drains quickly and completely

CAUTION
To prevent injury, pay attention to the hot oil.
Make sure the fuel cap is tightly secured to avoid spillage.
Re-install the drain plug before refilling oil.

Refer to page 5 for the recommended oil.
Always use the best grade and clean oil.
Contaminated oil, poor quality oil and shortage of oil cause damage to engine or shorten the engine life.

CLEANING FUEL CUP (See Fig. 7-4 )

WARNING Flame Prohibited

WARNING
Remove the statistic electricity from your body before refilling the gasoline.
Sparking from electrostatic discharge may cause the ignition to the vaporized fuel (gasoline) resulting burns.
Static electricity can be discharged from the body by touching by hand the metal parts of the unit.

1. Inspect fuel cup for water and dirt. (See Fig. 7-4 – 1)
2. To remove water and dirt, close the fuel valve and remove the fuel cup.
3. After removing dirt and water, wash the fuel cup with kerosene or gasoline. Reinstall securely to prevent leakage.

CLEANING AIR CLEANER

(See Fig.7 -5 )
A dirty air cleaner element will cause starting difficulty, power loss, engine malfunctions, and shorten engine life extremely. Always keep the air cleaner element clean.

WARNING Flame Prohibited

• Urethane Foam cleaning (See Fig.7 -5 -2 )
  Wash and clean the urethane foam with detergent.
  After cleaning, dry it. Clean the urethane foam element every 50 hours.

• Second element (See Fig. 7-5 -1 )
  Clean by tapping gently to remove dirt and blow off dust. Never use oil. Clean the paper element every 50 hours of operation, and replace element set every 200 hours.

NOTE
Clean and replace air cleaner elements more often when operating in dusty environments. Replace the element in case that dirt or dust can not be removed and/or that the element is deformed or deteriorated.

FUEL HOSE REPLACEMENT
(See Fig7. -8 )

WARNING

• Take extreme caution when replacing fuel hose; gasoline is extremely flammable.
• Remove the statistic electricity from your body before refilling the gasoline. Sparking from electrostatic discharge may cause the ignition to the vaporized fuel (gasoline) resulting burns.
  Static electricity can be discharged from the body by touching by hand the metal parts of the unit.

Replace the fuel hose every 1,000 hours or every 2 years.
If fuel leaks from fuel hose, replace the fuel hose immediately.

CHECKING BOLTS, NUTS AND SCREWS

• Retighten loose bolts and nuts.
• Check for fuel and oil leaks.
• Replace damaged parts with new ones.

CLEANING PUMP INSIDE

(See Fig. 7-7 –10 )
(Except EW2050H, EW3050H)

If the inside of the pump is plugged up with small rocks or if the inside of the pump has to be cleaned, you can clean the inside of the pump by removing the casing cover using the Hexagon wrench that comes with the pump.

The accessory Hexagon wrench (8 mm) is attached to the upper part of the casing. (See Fig.7 -7 )

1. Removal of the casing cover (See Fig. 7- 8)
   Remove the 4 socket bolts.

2. Cleaning the inside of the pump (See Fig.7 -9 )
   After removing the pebbles and dirt from the inside of the pump, rinse it out with clean water.

Explanation of Fig. 7-8

Casing cover O-Ring

Make sure not to damage the O-ring as this will cause water leakage.
If the O-ring is deteriorated or damaged, replace it with a new one.
(3) Reattaching the casing cover (See Fig.7 -10 )
Tighten the 4 socket bolts.

PREPARATIONS FOR STORAGE

WATER (See Fig. 8-1 )
Drain all water from the drain plug.

CAUTION
When retightening drain plug, be sure to clean the drain plug and the thread of casing. Otherwise, the thread may be damaged.

DISCONNECT THE DELIVERY HOSE
Tilt the pump and drain all water from delivery hole. Severe damage to pump may result if water freezes in the pumping chamber.

DISCHARGE FUEL
(See Fig.8 -2 )

WARNING Flame Prohibited
If you do not use the engine more than 1 month, discharge fuel to prevent gum in the fuel system and carburetor parts.

WARNING

• Remove the statistic electricity from your body before refilling the gasoline. Sparking from electrostatic discharge may cause the ignition to the vaporized fuel (gasoline) resulting burns.
  Static electricity can be discharged from the body by touching by hand the metal parts of the unit.

• Always store/carry the fuel (gasoline) with metallic portable tank to prevent fire.

• Remove the strainer cup, place the strainer over a container and open the strainer valve to discharge fuel from the fuel tank.

• Remove the drain screw of the carburetor float chamber and discharge fuel.

ENGINE OIL (See Fig.8 -3 )

• Change the engine oil with fresh oil.
• Remove the spark plug, pour about 5 cc of engine oil into the cylinder, slowly pull the starter handle of the recoil starter 2 or 3 times, and reinstall the spark plug.

CLEAN AND STORE

• Slowly pull the recoil starter handle until resistance is felt and leave it in that position.
• Clean the pump thoroughly with an oiled cloth, put the cover on, and store the pump indoors in a well ventilated, low humidity area.

OIL SENSOR INSTRUCTIONS

FUNCTION OF OIL SENSOR
The engine will stop automatically when the oil level falls below the safety limit. The engine cannot be started unless the level is raised above the prescribed limit. (See Fig.2 -4 )

RESTARTING

1. Fill the crankcase with oil up to the proper level.
2. As for restarting and operating the engine, refer to section “4. OPERATING YOUR PUMP” on page 6.
   Check the wire connector from the engine. It must be connected securely to the wire from oil sensor.
   When selecting the engine oil, refer to page 5 for the recommended oil.

EASY TROUBLESHOOTING

1. PUMP DOES NOT RUN.
   Engine dose not start.
   (See “8.-6. WHEN ENGINE DOES NOT START”)
   Sticking of impeller (Disassemble and clean.)

2. PUMPING VOLUME IS SMALL.

   • Sucking air at suction side.
     (Check piping at suction side.)

   • Drop off engine output.
     (Consult your nearest dealer.)

   • Breakage of mechanical seal.
     (Consult your nearest dealer.)

   • High suction lift (Lower.)

   • Suction hose is too long or thin.
     (Use a thick hose in minimum length.)

   • Leak of water from water passage. (Stop leaking.)

   • Clogging of foreign substance in impeller.
     (Disassemble and clean.)

   • Wear of impeller.

   • Strainer is clogged. (Clean.)

   • Engine speed is too low.
     (Consult your nearest dealer.)

3. PUMP DOES NOT SELFPRIME.

   • Suction of air at suction side.
     (Check piping at suction side.)

   • Insufficient priming water inside pump casing.
     (Prime fully.)

   • Imperfect tightening of drain plug.
     (Tighten the plugs completely.)

   • Engine speed is too low.
     (Consult your nearest dealer.)

   • Sucking air from mechanical seal.
     (Consult your nearest dealer.)

4. DELIVERY HOSE DOES NOT STAY ON COUPLING.
   Hose may be kinked or discharge end may be
   blocked or clogged. (Straighten or clean.)

5. PUMP SUDDENLY STOPS.
   Solid object preventing pump-rod from completing stroke. (Disassemble and clean.)

WHEN ENGINE DOES NOT START:

Perform the following checks before you take the pump to your Makita dealer. If you still have trouble after completing the checks, take the pump to your nearest Makita dealer.

Is there a strong spark across the electrode?

• Is the stop switch at position “ I ” (ON)?

• Remove and inspect the spark plug.
  If the electrode is fouled, clean or replace it with new one.
  Remove the spark plug and connect it to the plug cap. Pull the starter handle while grounding spark plug against engine body. Try with a new spark plug if the spark is weak or there is no spark.
  The ignition system is faulty if there is no spark with a new spark plug.
  WARNING

• Wipe out spilled fuel carefully before testing. Place spark plug as far away from spark plug hole as possible.
  Do not hold spark plug by hand while pulling recoil starter.
  NOTE
  The engine with oil sensor will stop automatically when the oil level falls below the prescribed limit. Unless the oil level is raised above the prescribed limit, the engine will stop immediately after starting.

Is there enough compression?

Pull the starter handle slowly and check if resistance is felt.
If little force is required to pull the starter handle, check if the spark plug is tightened firmly. If the spark plug is loose, tighten it.

Is the spark plug wet with gasoline?

• Is the fuel valve opened?
• Choke (close choke lever) and pull the starter handle five or six times. Remove the plug and check if its electrode is wet. If the electrode is wet, fuel is well supplied to your engine.
• When the electrode is dry, check where the fuel stops. (Check the fuel intake of the carburetor.)
• In case the engine does not start with well supplied fuel, try using fresh fuel.

SPECIFICATIONS

pump
Suction × Delivery Diameters mm| 50 × 50| 76 × 76| 50 × 50| 76 × 76
Total Head                                   m| 32| 23
Maximum Delivery Volume

Liter/min

| ****

520

| ****

1000

| ****

700

| ****

1000

Suction Head                              m| 8.0
Axle Seal Material (Mechanical Seal)| ****

Ceramic – carbon

| ****

Silicon – carbide

ENGINE| Model| EX16| EX17| EX16| EX17
Type| Air-Cooled, 4-cycle, OHC, Gasoline Engine
Lubricant| Automotive detergent oil

(API / SE or higher grade, SG, SH or SJ is recommended. SAE / 10W-30 etc.)

Oil Capacity                             Liter| 0.6
Fuel| Automotive unleaded gasoline
Fuel Tank Capacity                  Liter| 3.2
Spark plug| TORCH E6RC or NGK BR-6HS
Starting system| Recoil starter
Dimensioms (L × W × H)| mm|  | 527 × 368 × 417
Net Weight| kg|  | 24.9| 26.1| 24.9| 26.1
Standard accessories| ****

Engine tool kit (1 set), Strainer (1 pc.), Hose coupling (2 set),

Hose band (3 pcs.), Instruction for use (1 pc.)

| Engine tool kit (1 set), Strainer (1 pc.), Hose coupling (2 set),

Hose band (3 pcs.), Instruction for use (1 pc.), Hexagon wrench (1 pc.)

EC-DECLARATION OF CONFORMITY

Noise

Sound pressure level at workstation. (2006/42/EC)

Sound power level (2000/14/EC-2005/88/EC)

These noise levels do not necessarily showed a safe working level. However, the user will enable better evaluation of hazard and risk using this information.
Note: The noise level changes with specifications.
Specifications may be changed without a preliminary announcement

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