Makita EW1050H Manuel D'instructions page 13

Pumping volume is small.
Pump does not self-prime.
Air enters suction side.
Drop of engine output.
Breakage of mechanical seal.
High suction lift.
Thin or long or kink of hose.
Leak of water from water pas-
sage.
Clogging of foreign sub-
stance in impeller.
Wear of impeller.
Suction of air at suction side.
Insufficient priming water
inside pump case.
Imperfect tightening of drain
cock.
Imperfect revolution of
engine.
Entrance of air from mechani-
cal seal.
Check piping at suction side.
Ask your local Makita authorized service center to
repair it.
Replace packing.
Lower the suction lift.
Thicken or shorten or straighten.
Stop leak.
Ask your local Makita authorized service center to
repair it.
Ask your local Makita authorized service center to
repair it.
Check piping at suction side.
Prime fully.
Tighten the 2 plugs completely.
Ask your local Makita authorized service center to
repair it.
Replace packing.
13