9
308–532
TROUBLESHOOTING CHART
WARNING
To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin or injury from
moving parts, always follow the
Pressure Relief Procedure Warning
before proceeding.
Problem
Cause
Solution
Engine will not start or
is hard to start
No gasoline in fuel tank or carburetor.
Low oil level.
Start/Stop switch in Stop position.
Water in gasoline or old fuel.
Loose or wrong battery connection.
Battery not properly charged.
Choked improperly. Flooded engine.
Dirty air cleaner filter.
Spark plug dirty, wrong gap or wrong type.
Spray gun closed.
Fill the tank with gasoline, open fuel shut off valve.
Check fuel line and carburetor.
Add to proper level.
Move switch to start position.
Drain fuel tank and carburetor. Use new fuel and
dry spark plug.
Check and tighten battery connections.
Check electrolyte level of cells, recharge battery.
Open choke and crank engine several times to
clear out gas.
Remove and clean.
Clean, adjust the gap or replace.
Trigger spray gun.
Engine misses or
lacks power
Partially plugged air cleaner filter.
Spark plug dirty, wrong gap or wrong type.
Incorrect ignition timing.
Remove and clean.
Clean, adjust the gap or replace.
Time engine.
Low pressure and/or
pump runs rough
Worn or wrong size tip.
Inlet filter clogged.
Worn packings, abrasives in water or natural
wear.
Inadequate water supply.
Belt slippage.
Fouled or dirty inlet or discharge valves. Even
a small particle can cause the valve to stick.
Restricted inlet.
Worn inlet or discharge valves.
Leaking high pressure hose.
Replace with tip of proper size.
Clean. Check more frequently.
Check filter. Replace packings. See PUMP
SERVICE.
Check water flow rate to pump.
Tighten or replace; use correct belts and replace
both at same time.
Clean inlet and discharge valve assemblies. Check
filter.
Check garden hose, may be collapsed or kinked.
Replace worn valves.
Replace high pressure hose.
Water leakage from
under pump manifold
Worn packings.
Install new packings. See PUMP SERVICE.
Water in pump
Humid air condensing inside crankcase.
Worn packings.
Oil seals leaking.
Change oil as specified in MAINTENANCE.
Install new packings. See PUMP SERVICE.
Install new oil seals. See PUMP SERVICE.
Frequent or
premature failure of
the packings
Scored, damaged or worn plungers.
Abrasive material in the fluid being pumped.
Inlet water temperature too high.
Overpressurizing pump.
Excessive pressure due to partially plugged or
damaged tip.
Pump running too long without spraying.
Running pump dry.
Install new plungers. See PUMP SERVICE.
Install proper filtration on pump inlet plumbing.
Check water temperature; may not exceed 160
F.
Do not modify any factory–set adjustments. See
EQUIPMENT MISUSE HAZARD.
Clean or replace tip. See Installing and Changing
Spray Tips.
Never run pump more than 10 minutes without
spraying.
Do not run pump without water.
Strong surging at the
inlet and low pressure
on the discharge side
Foreign particles in the inlet or discharge
valve or worn inlet and/or discharge valves.
Clean or replace valves. See PUMP SERVICE.
