Pressure Washers
Troubleshooting Chart - Gasoline Powered Pressure Washers Only
| Symptom | Possible Cause(s) | Corrective Action(s) | ||
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| Engine will not start or is hard | 1. | No gasoline in fuel tank or carburetor | 1. | Fill the tank with gasoline,open fuel shut off valve. |
| to start | 2. | Low oil |
| Check fuel line and carburetor |
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| 2. | Check oil level. Fill if necessary | ||
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| 3. | Start/Stop switch in stop position | 3. | Move switch to start position |
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| 4. | Water in gasoline or old fuel | 4. | Drain fuel tank and carburetor. Use new fuel and dry |
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| 5. | Dirty air cleaner filter |
| spark plug |
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| 5. | Remove and clean or replace | ||
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| 6. | Spark plug dirty, wrong gap or wrong type | 6. | Clean, adjust the gap, or replace |
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| 7. | Spray gun closed | 7. | Trigger spray gun |
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| 8. | Other causes | 8. | See engine owner’s manual |
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| Engine misses or lacks power | 1. | Partially plugged air cleaner filter | 1. | Remove and clean or replace |
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| 2. | Spark plug dirty, wrong gap or wrong type | 2. | Clean, adjust the gap, or replace |
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| Low pressure and/or pump | 1. | Worn or wrong size tip | 1. | Replace with tip of proper size |
| runs rough | 2. | Inlet filter on pump clogged | 2. | Clean. Check more frequently |
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| 3. | Worn water seals, abrasives in water, or natural wear | 3. | Check filter. Replace water seals. See service center |
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| 4. | Fouled or dirty inlet or discharge valves | 4. | Clean inlet and discharge valve assemblies. Check filter |
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| 5. | Restricted inlet | 5. | Check garden hose, may be collapsed or kinked. Check |
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| 6. | Worn inlet or discharge valves |
| inlet water flow |
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| 6. | Replace worn valves | ||
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| 7. | Leaking high pressure hose | 7. | Replace high pressure hose |
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| 8. | Pump drawing in air | 8. | Ensure hoses and fittings are tight |
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| 9. | Unloader valve seat faulty or worn | 9. | Check and replace |
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| Water leakage from under | Worn water seals | Install new water seals. See service center | ||
| pump manifold |
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| Water in pump crankcase | 1. | Humid air condensing inside crankcase | 1. | Change oil as specified in maintenance schedule |
| (milky oil) | 2. | Oil seals leaking | 2. | Install new oil seals. See service center |
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| 3. | Water seals leaking | 3. | Install new water seals. See service center |
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| Frequent or premature failure | 1. | Scored damaged or worn plungers | 1. | Install new plungers. See service center |
| of the pump water seals | 2. | Abrasive material in the fluid | 2. | Install proper filtration on pump inlet plumbing |
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| 3. | Inlet water temperature too high | 3. | Check water temperature; may not exceed 100ºF |
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| 4. | Overpressurizing pump | 4. | Do not modify any factory set adjustments |
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| 5. | Excessive pressure due to partially plugged or | 5. | Clean or replace tip |
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| damaged tip |
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| 6. | Pump running too long without spraying | 6. | Never run pump more than 2 minutes without spraying |
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| 7. | Pump running dry | 7. | Do not run pump without water |
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Strong surging at the inlet and low pressure
Foreign particles in the inlet or discharge valve or worn Clean or replace valves. See service center inlet and/or discharge valves
| Oil leakage between the | Worn oil seals and/or | Replace oil seals and/or |
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| Fluctuating pressure | 1. | Low engine oil | 1. | Add oil. |
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| 2. | Valve worn, dirty or stuck | 2. | Check and replace |
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| 3. | Pump drawing in air | 3. | Ensure hoses and fittings are tight. Purge air from gar- |
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| 4. | Tip clogged |
| den hose |
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| 4. | Check or replace |
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| Pressure drops after period of | 1. | Worn pump water seals | 1. | Check and replace |
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| normal use | 2. | Nozzle worn | 2. | Check and replace |
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| 3. | Valve worn, dirty or stuck | 3. | Check, clean or replace |
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| 4. | Unloader valve seat worn or dirty | 4. | Check, clean or replace |
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| 5. | Nozzle in low PSI position | 5. | Pull back nozzle to high pressure position |
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| Pump noisy / pump runs | 1. | Pump drawing in air/low water supply | 1. | Ensure fittings are tight. Increase water pressure |
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| rough | 2. | Valves dirty or worn | 2. | Check, clean or replace |
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| 3. | Worn bearings | 3. | Check and replace |
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| 4. | Water too hot | 4. | Reduce temperature below 100ºF |
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CONTINUED ON NEXT PAGE
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