Troubleshooting
18
3A6588B
Troubleshooting
1. Follow
Pressure Relief Procedure
, page 10,
before checking or repairing gun.
2. Check all possible problems and causes before
disassembling gun.
Problem
Cause
Solution
Engine not starting or hard to start
No gasoline in fuel tank or carburetor Fill the tank with gasoline and open
fuel shut off valve.
Check fuel line to carburetor.
Low oil
Add oil to proper level.
Start/Stop switch in STOP position
Move switch to START position.
Water in fuel, or old fuel
Drain fuel tank and carburetor. Use
new fuel, and make sure spark plug is
dry.
Engine flooded or improperly choked Open choke, and crank engine
several times to clear out gas. Make
sure spark plug is dry.
Dirty air cleaner filter
Remove and clean.
Dirty spark plug, wrong gap, or wrong
type
Clean spark plug, adjust the gap, or
replace.
Gun not triggered
Trigger gun while starting engine.
Engine not operating properly or
lacking power
Partially plugged air cleaner filter
Remove and clean.
Spark plug dirty, wrong gap, or wrong
type
Clean spark plug, adjust the gap, or
replace.
Pressure too low and/or pump
running roughly
Worn or wrong size nozzle
Replace with nozzle of proper size
Inlet filter clogged
Clean filter. Check more frequently.
Worn packings, abrasives in water, or
natural wear
Check filter. Replace packings.
Inadequate water supply
Check water flow rate to pump.
Belts slipping
Tighten or replace belts; use correct
belts, and replace both at same time.
Fouled or dirty inlet or discharge
valves
Clean inlet and discharge valve
assemblies. Check filter.
Restricted inlet
Check if garden hose is collapsed or
kinked.
Worn inlet or discharge valves
Replace worn valves.
Leak in high-pressure hose
Replace high-pressure hose.
Water leaking from under pump
manifold
Worn packings
Install new packings.
