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Maintenance and Troubleshooting
Owner’s Manual for Water Pump 13
Pump not
operating.
1. Air leak in suction hose.
2. Suction and/or discharge hoses
blocked.
3. End of suction hose not submerged.
4. Total head exceeds pump capacity.
1. Check suction hose and connections
for leaks. Tighten or repair.
2. Check hoses and strainer. Clear
obstructions.
3. Increase suction hose length or
move pump closer to water.
4. Reduce total head or choose a
different pump for the task.
Weak
discharge
flow.
1. Air leakage (intake) at suction side.
2. Reduced engine power output.
3. Damaged mechanical seal.
4. Suction lift too high.
5. Suction hose too long, or hose
diameter too small.
6. Leaking discharge hose or
connection.
7. Damaged mechanical seal.*
8. Impeller obstructed.
9. Worn impeller.**
10. Engine throttle in SLOW position
1. Check suction hose and connections
for leaks. Tighten or repair.
2. Contact Independent Authorized
Service Dealer.
3. Replace mechanical seal.
4. Lower suction lift.
5. Shorten suction hose, or increase
hose diameter.
6. Check discharge hose and
connection for leaks. Tighten or
repair.
7. Replace mechanical seal.
8. Clean impeller.
9. Replace impeller.
10. Increase throttle position.
Pump does
not prime
water, or
priming takes
a long time.
1. Air leakage (intake) at suction side.
2. Insufficient priming water inside
pump casing.
3. Water drain plug is loose.
4. Engine malfunction.
5. Damaged mechanical seal.
6. Incorrectly sized suction hose.
7. Suction hose is too long.
8. Excessive suction lift. ***
1. Check suction hose and connections
for leaks. Tighten or repair.
2. Add priming water.
3. Tighten water drain plug.
4. Contact Independent Authorized
Service Dealer.
5. Replace mechanical seal.
6. Use correct suction hose.
7. Move pump closer to water.
8.
Pump loses
prime.
1. Water level drops below the end of
the suction line.
1. Increase length of suction line or
move the pump closer to the water
source.
Pump shuts
down during
operation.
1. No fuel.
2. Low oil sensor shuts down unit.
1. Allow engine to cool for 2 minutes,
then fill fuel tank.
2. Make sure unit is on flat surface.
Check oil level and add more if
necessary.
Oil leakage
at muffler or
air cleaner.
Engine failure. Repair or replace.
Water
leakage
between
engine and
pump.
Damaged mechanical seal. Replace mechanical seal.
* Mechanical seal damage may be caused by normal wear, overheating, or pumping
incompatible fluids.
** Excessive impeller wear is primarily due to cavitation. Causes include restricted suction and
excessive suction lift.
*** Total suction head should not exceed 26 ft (8 m).
PROBLEM CAUSE CORRECTION
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