16 309880
Troubleshooting
Relieve the pressure
(see page 5) before you proceed with troubleshooting.
PROBLEM
CAUSE
SOLUTION
Engine not starting or
hard to start
No gasoline in fuel tank or carburetor
Low oil
Start/Stop switch in STOP position
Water in fuel, or old fuel
Engine flooded or improperly choked
Dirty air cleaner filter
Spark plug dirty, wrong gap, or wrong type
Gun not triggered
Fill the tank with gasoline, and open fuel shut off valve.
Check fuel line and carburetor.
Add oil to proper level.
Move switch to START position.
Drain fuel tank and carburetor. Use new fuel, and make
sure dry spark plug is dry.
Open choke, and crank engine several times to clear
out gas. Make sure spark plug is dry.
Remove and clean.
Clean, adjust the gap, or replace.
Trigger gun while starting engine.
Engine missing or
lacking power
Partially plugged air cleaner filter
Spark plug dirty, wrong gap, or wrong type
Remove and clean.
Clean, adjust the gap, or replace.
Pressure too low
and/or pump running
roughly
Worn or wrong size tip
Inlet filter clogged
Worn packings, abrasives in water, or
natural wear
Inadequate water supply
Belts slipping
Fouled or dirty inlet or discharge valves
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
on
page 10.
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 if garden hose is collapsed or kinked.
Replace worn valves. See
Pump Service
on page 10.
Replace high-pressure hose.
Water leaking from un-
der pump manifold
Worn packings
Install new packings. See
Pump Service
on page 10.
Water in pump oil
Humid air condensing inside crankcase
Worn packings
Oil seals leaking
Change oil as specified in
Maintenance
on page 9.
Install new packings. See
Pump Service
on page 10.
Install new oil seals. See
Pump Service
on page 10.
Packings failing fre-
quently or prematurely.
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
on page 10.
Install proper filtration on pump inlet plumbing.
Check water temperature. It should not exceed
160
_
F (70
_
C).
Do not modify any factory-set adjustments. See
EQUIP-
MENT MISUSE HAZARD
on page 3.
Clean or replace tip. See
Installing and Changing
Spray Tips
on page 6.
Never run pump more than 10 minutes without spraying.
Do not run pump without water.
Strong surging at inlet,
and low pressure on
discharge side
Foreign particles in the inlet or discharge
valve, or worn inlet and/or discharge
valves
Clean or replace valves. See
Pump Service
on
page 10.
