Easy Troubleshooting - Makita EW2050H Manuel D'instructions

8. 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.)
10
6. 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.
(1) 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.
(2) 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.
(3) 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.