KARCHER Surface Cleaner • 9.802-898.0 • Rev. 09/19
25
PRESSURE WASHER
OPERATOR’S MANUAL
PROBLEM
POSSIBLE CAUSE
SOLUTION
FLUCTUATING
PRESSURE
Worn or dirty pump valves
Call local distributor.
Nozzle is obstructed
Blow out or remove debris with fine needle.
Pump sucking air, inlet hose
leaking
Check that all hoses and fittings are airtight.
Turn off machine and trigger spray gun until
a steady flow of water emerges through the
nozzle.
Insufficient water supply
Turn water on full force. Check garden hose
for kinks, leaks or blockage.
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
Nozzle worn
Replace nozzle.
Unloader valve worn
Replace unloader valve.
ENGINE WILL NOT
START OR STOPS
WHILE OPERATING
Low oil shutdown
Fill engine with oil.
Out of gas
Fill fuel tank.
Water in gasoline
Drain gas tank; fill with clean fuel.
ENGINE IS
OVERLOADED
Nozzle partially blocked
Clean nozzle.
Excessive pressure from high
engine RPM
Adjust engine throttle to lower RPM.
WATER OR OIL
LEAKING FROM
BOTTOM OF PUMP
A small amount of leaking is
normal
If excessive leaking occurs, call local
distributor.
PRESENCE OF
WATER IN PUMP OIL
Water sprayed at machine
Change oil. Direct spray away from machine.
High humidity in air
Check and change oil twice as often.
Piston packing worn. Oil seal worn.
Call local distributor.
ENGINE OPERATES
FOR 15 MINUTES
THEN STOPS
Not enough gas or engine oil
Fill tank with gas. Check oil level.
Vapor lock developed by heat of
day
Keep gas tank full to avoid vapor locking.
Obstruction in fuel filter
Clean or replace fuel filter.
ENGINE LACKS
POWER
Dirty air filter
Replace air filter.
ENGINE FALTERS
Choke is opened too soon
Move choke to halfway position until engine
runs smoothly.
WATER DRIPPING
FROM UNDER PUMP
Piston packing worn
Call local distributor.
O-Ring plunger retainer worn
Call local distributor.
Cracked piston
Call local distributor.
OIL DRIPPING FROM
UNDER PUMP
Oil seal worn or damaged
Call local distributor.
WATER LEAKING
FROM PUMP
PROTECTOR
Spray gun closed with machine
running 5 minutes or longer
Open spray gun or turn off machine.
Excess water supply pressure
Place a pressure regulator at end of 50'
garden hose.
TROUBLESHOOTING
