Pressure Washer
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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| 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 100o F. |
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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 | ||
engine and the pump |
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Fluctuating pressure | 1. | Valve worn, dirty or stuck | 1. | Check and replace |
| 2. | Pump drawing in air | 2. | Ensure hoses and fittings are tight. Purge air from gar- |
| 3. | Tip clogged |
| den hose |
| 3. | Check or replace | ||
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Pressure drops after period of | 1. | Worn pump water seals | 1. | Check and replace |
normal use | 2. | Nozzle worn | 2. | Check and replace |
| 3. | Valve worn, dirty or stuck | 3. | Check, clean or replace |
| 4. | Unloader valve seat worn or dirty | 4. | Check, clean or replace |
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Pump noisy / pump runs | 1. | Pump drawing in air/low water supply | 1. | Ensure fittings are tight. Increase water pressure |
rough | 2. | Valves dirty or worn | 2. | Check, clean or replace |
| 3. | Worn bearings | 3. | Check and replace |
| 4. | Water too hot | 4. | Reduce temperature below 100o F |
Pressure washer will not spray | 1. | Nozzle not pushed up far enough |
detergent | 2. | Clog, kink, or hole in detergent suction hose |
| 3. | Hose length too long |
| 4. | Lance not functioning properly |
1.Push nozzle forward as far as it will go.
2.If clean, unkink or replace hose.
3.Use only hose length provided with initial purchase of pressure washer. Detergent suction will not function if more than one section of hose is attached to unit.
4.Remove lance from gun. If detergent is dispensed through gun, the lance must be replaced. If no deter- gent is dispensed through gun, remove 1 inch tapered detergent barb from pump. Clean the barb, and make sure that ball and spring are properly aligned with tapered portion of the spring facing the ball. The ball should be on top of the spring.
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