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