Trouble Shooting - Mitsubishi MBP15G Operator's Manual

Problem
No pump output or low
pump output when water
pump is running.
Engine will not start; lacks
power; starts and runs
rough; or "hunts" or falters.

TROUBLE SHOOTING

Cause
1. Pump not primed.
2. Suction hose restricted, collapsed, damaged,
too long, or diameter too small.
3. Strainer not completely under water.
4. Air leak at suction hose connector.
5. Strainer clogged.
6. Discharge hose restricted, damaged, too long,
or diameter too small.
7. Excessive or marginal head.
8. Engine speed lever is in "Slow " position.
1. Stop switch set to " Off ".
2. Fuel valve is in "Off " position.
3. Dirty air cleaner.
4. Out of fuel.
5. Stale or contaminated fuel or water in fuel.
6. Spark plug wire not connected to spark plug.
7. Bad spark plug.
8. Excessive fuel is present in the air/fuel mixture
causing a "flooded" condition.
9. Excessively rich fuel mixture.
10. Intake valve stuck open or closed.
11. Engine has lost compression.
12. Carburetor is running too rich or too lean.
Correction
1. Fill pump chamber with water and prime
pump.
2. Replace suction hose.
3. Sink the strainer and the end of suction hose
completely under water.
4. Replace sealing washer if missing or
damaged. Tighten hose connector and clamp.
5. Clean debris from strainer.
6. Replace discharge hose.
7. Relocate pump and/or hoses to reduce head.
8. Move engine speed lever to " Fast "
position.
1. Set switch to "On".
2. Turn fuel valve to "On" position.
3. Clean or replace air cleaner.
4. Wait two minutes and fill fuel tank.
5. Drain fuel tank and carburetor; fill
with fresh fuel.
6. Connect wire to spark plug.
7. Replace spark plug.
8. Wait 5 minutes and re-crank engine.
9. Contact service facility.
10. Contact service facility.
11. Contact service facility.
12. Contact service facility.
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