TROUBLESHOOTING (ENGINE/PUMP)
TABLE 7. ENGINE TROUBLESHOOTING (Continued)
SYMPTOM | POSSIBLE PROBLEM | SOLUTION | |
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Operation not satisfactory |
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| Governor adjustment improper? | Adjust governor to correct lever. | |
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| Governor spring defective? | Clean or replace ignition. | |
Rotational speed fluctuates. |
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Fuel flow erratic? | Check fuel line. | ||
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| Air taken in through suction | Check suction line. | |
| line? |
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Recoil starter not working | Dust in rotating part? | Clean recoil starter assembly. | |
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properly. | Spring spring failure? | Replace sprial 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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| Strainner 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 sealed. |
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| Pump does not take on water. |
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| Pump is located too high above water line? | Move pump closer to water. |
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| Debris collecting in pump housing? | Clean pump housing. |
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| Too much distance between impeller and volute. | Adjust clearance by adding shims or replace impeller. |
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| Min. .006" - Max. .020" |
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| Water leaking out weep hole between pump and | Check condition of mechanical seal and gaskets, |
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| engine? | between pump end and engine housing. |
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| Engine speed too low? | Increase throttle speed. |
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| Pump takes in water, little or no | Suction strainer partially plugged? | Clean strainer. |
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| discharge. |
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| Impeller/Volute worn? | Adjust clearance by adding shims or replace |
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| impeller/volute |
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| Fittings/clamps are not sealed properly? | Tighten, replace or add clamp. (Keep extra seals on |
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| Suction hose leaks at inlet. | pump) |
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| Hose diameter is too large? | Use smaller diameter hose or replace 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 debris from |
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| inside housing. |
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| Impeller does not turn: pump is |
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| Impeller and volute binding? | Adjust clearance by removing shim from behind |
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| hard to start. |
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| impeller. |
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| Defective engine? | See Engine Owner's Manual. |
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PAGE 26 — QP2H CENTRIFUGAL PUMP • OPERATION AND PARTS MANUAL — REV. #0 (08/04/08)