TROUBLESHOOTING (ENGINE/PUMP)
Table 7. Engine Troubleshooting
Symptom | Possible Problem | Solution | |
Operation not satisfactory |
|
| |
| Governor adjustment improper? | Adjust governor to correct lever. | |
Rotational speed fluctuates. | Governor spring defective? | Clean or replace ignition. | |
Fuel flow erratic? | Check fuel line. | ||
| |||
| Air taken in through suction line? | Check suction line. | |
Recoil starter not working properly. | Dust in rotating part? | Clean recoil starter assembly. | |
Spring failure? | Replace spiral spring. | ||
|
Table 8. Pump Troubleshooting
| Symptom | Possible Problem | Solution |
|
|
| Not enough priming water in the housing? | Add water. |
|
|
| Engine speed too low? | Increase throttle. |
|
|
| Strainer plugged? | Clean strainer. |
|
|
| Suction hose damaged? | Replace or repair hose, and clamps. |
|
|
|
|
|
|
|
| Air leak at suction port? | Check that fittings are tight and properly |
|
|
| sealed. |
| |
| Pump does not take |
|
| |
| Pump is located too high above water line? | Move pump closer to water. |
| |
| on water. |
| ||
|
| Debris collecting in pump housing? | Clean pump housing. |
|
|
| Too much distance between impeller | Adjust clearance by adding shims or |
|
|
| and volute. | replace impeller. Min. .006" - Max. .020". |
|
|
| Water leaking out weep hole between pump | Check condition of mechanical seal and |
|
|
| gaskets, between pump end and engine |
| |
|
| and engine? | housing. |
|
|
|
|
| |
|
| Engine speed too low? | Increase throttle speed. |
|
| Pump takes in water, little or |
|
|
|
| Suction strainer partially plugged? | Clean strainer. |
| |
| no discharge. |
|
|
|
| Impeller/Volute worn? | Adjust clearance by adding shims or |
| |
|
|
| ||
|
| replace impeller/volute. |
| |
|
|
|
| |
|
| Fittings/clamps are not sealed properly? | Tighten, replace or add clamp. (Keep |
|
|
| extra seals on pump). |
| |
| Suction hose leaks at inlet. |
|
| |
| Hose diameter is too large? | Use smaller diameter hose or replace |
| |
|
|
| ||
|
| hose. |
| |
|
|
|
| |
| Discharge does not stay on | Pressure too high? | Check pressure, add additional clamp. |
|
| coupling. | Hose kinked or end blocked? | Check hose. |
|
|
|
|
|
|
|
| Impeller jammed or blocked? | Open pump cover and clean dirt and |
|
|
| debris from inside housing. |
| |
| Impeller does not turn: |
|
| |
| Impeller and volute binding? | Adjust clearance by removing shim from |
| |
| pump is hard to start. |
| ||
| behind impeller. |
| ||
|
|
|
| |
|
| Defective engine? | See Engine Owner's Manual. |
|
|
|
|
|
|
|
|
|
|
|
QP2H CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #1 (01/29/14) — PAGE 27
