Operating Instructions and Parts Manual
Troubleshooting Chart - Gasoline Powered Pressure Washers Only
Symptom
Engine will not start or is hard to start
Possible Cause(s)
1.No gasoline in fuel tank or carburetor
2.Low oil
3.Start/Stop switch in stop position
4.Water in gasoline or old fuel
5.Dirty air cleaner filter
6.Spark plug dirty, wrong gap or wrong type
7.Spray gun closed
8.Other causes
Corrective Action
1.Fill the tank with gasoline,open fuel shut off valve.. Check fuel line and carburetor
2.Check oil level.. Fill if necessary
3.Move switch to start position
4.Drain fuel tank and carburetor. Use new fuel and dry spark plug
5.Remove and clean or replace
6.Clean, adjust the gap, or replace
7.Trigger spray gun
8.See engine owner’s manual
Engine misses or lacks | 1. | Partially plugged air cleaner filter | 1. | Remove and clean or replace |
power | 2. | Spark plug dirty, wrong gap or | 2. | Clean, adjust the gap, or replace |
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| wrong type |
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Low pressure and/or | 1. | Worn or wrong size tip | 1.. Replace with tip of proper size | |
pump runs rough | 2. | Inlet filter on pump clogged | 2.. Clean.. Check more frequently | |
| 3. | Worn water seals, abrasives in | 3.. Check filter.. Replace water seals.. See service center | |
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| water, or natural wear |
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| 4. | Fouled or dirty inlet or discharge | 4.. Clean inlet and discharge valve assemblies.. Check | |
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| valves |
| filter |
| 5. | Restricted inlet | 5.. Check garden hose, may be collapsed or kinked.. | |
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| Check inlet water flow |
| 6. | Worn inlet or discharge valves | 6.. Replace worn valves | |
| 7. | Leaking high pressure hose | 7.. Replace high pressure hose | |
| 8. | Pump drawing in air | 8.. Ensure hoses and fittings are tight | |
| 9. | Unloader valve seat faulty or worn | 9.. Check and replace | |
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Water leakage from | Worn water seals | Install new water seals.. See service center | ||
under pump manifold |
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Water in pump | 1. | Humid air condensing inside | 1. | Change oil as specified in maintenance schedule |
crankcase (milky oil) |
| crankcase | 2. | Install new oil seals.. See service center |
| 2. | Oil seals leaking |
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Frequent or premature | 1. | Scored damaged or worn plungers | 1. | Install new plungers.. See service center |
failure of the pump | 2. | Abrasive material in the fluid | 2. | Install proper filtration on pump inlet plumbing |
water seals | 3. | Inlet water temperature too high | 3. | Check water temperature; may not exceed 100o F. |
| 4. | Overpressurizing pump | 4. | Do not modify any factory set adjustments.. |
| 5. | Excessive pressure due to partially | 5. | Clean or replace tip.. |
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| plugged or damaged tip |
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| 6. | Pump running too long without | 6. | Never run pump more than 2 minutes without |
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| spraying |
| spraying |
| 7. | Pump running dry | 7. | Do not run pump without water |
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Strong surging at the | Foreign particles in the inlet or | Clean or replace valves.. See service center | ||
inlet and low pressure | discharge valve or worn inlet and/or |
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| discharge valves |
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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 |
| 2. | Pump drawing in air |
| 3. | Tip clogged |
1.Check and replace
2.Ensure hoses and fittings are tight.. Purge air from garden hose
3.Check or replace
Pressure drops after | 1. | Worn pump water seals | 1. | Check and replace |
period of 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 |
| 5. | Nozzle in low psi position | 5. | Pull back nozzle to high pressure position |
www.chpower.com | 14 |
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