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TROUBLESHOOTING CHART
Troubleshooting Chart - Gasoline Powered Pressure Washers Only
Symptom Possible Cause(s) Corrective Action(s)
Engine will not start
or is hard to start
Engine misses or
lacks power
Low pressure and/or
pump runs rough
Water leakage from
under pump
manifold
Water in pump
crankcase (milky oil)
Frequent or
premature failure of
the pump water
seals
Strong surging at
the inlet and low
pressure
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
1. Partially plugged air cleaner filter
2. Spark plug dirty, wrong gap or
wrong type
3. Bad Fuel
1. Worn or wrong size tip
2. Inlet filter on pump clogged
3. Worn water seals, abrasives in
water, or natural wear
4. Fouled or dirty inlet or discharge
valves
5. Restricted inlet
6. Worn inlet or discharge valves
7. Leaking high pressure hose
8. Pump drawing in air
9. Unloader valve seat faulty or worn
10. Inlet water temperature too high
Worn water seals
1. Humid air condensing inside
crankcase
2. Oil seals leaking
3. Water seals leaking
1. Scored damaged or worn plungers
2. Abrasive material in the fluid
3. Inlet water temperature too high
4. Overpressurizing pump
5. Excessive pressure due to partially
plugged or damaged tip
6. Pump running too long without
spraying
7. Pump running dry
Foreign particles in the inlet or
discharge valve or worn inlet and/or
discharge valves
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
1. Remove and clean or replace
2. Clean, adjust the gap, or replace
3. Drain fuel and carburetor. Use new
fuel.
1. Replace with tip of proper size
2. Clean. Check more frequently
3. Check filter. Replace water seals. See
service center
4. Clean inlet and discharge valve
assemblies. Check filter
5. Check garden hose, may be collapsed or
kinked. Check inlet water flow
6. Replace worn valves
7. Replace high pressure hose
8. Ensure hoses and fittings are tight
9. Check and replace
10. Check water temperature; may not
exceed 100° F / 38° C
Install new water seals. See service center
1. Change oil as specified in maintenance
schedule
2. Install new oil seals. See service center
3. Install new water seals. See service
center
1. Install new plungers. See service center
2. Install proper filtration on pump inlet
plumbing
3. Check water temperature; may not
exceed 100° F / 38° C
4. DO NOT modify any factory set
adjustments
5. Clean or replace tip
6. NEVER run pump more than 2 minutes
without spraying
7. DO NOT run pump without water
Clean or replace valves. See service center