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Troubleshooting
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Troubleshooting
T
Problem Cause Solution
Engine will not start or it is hard to
start
No gasoline in fuel tank or carburetor Fill tank with gasoline, open fuel shut-
off valve. Check fuel line and carbure-
tor.
Low oil Add oil to proper level.
Engine ON/OFF switch in OFF posi-
tion
Turn switch to ON 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. Pull engine starter rope
several times to clear out fuel. Make
sure spark plug is dry.
Dirty air cleaner filter Remove and clean filter.
Spark plug dirty, wrong gap or wrong
type
Clean, adjust gap or replace spark
plug.
Gun not triggered Trigger gun while starting engine.
6.5 hp Briggs and Stratton model
may experience “vapor lock” due to
gas type and temperature
Allow unit to cool approximately 15
minutes and restart.
Engine misses or lacks power Partially plugged air cleaner filter Remove and clean.
Valve adjustment (lash) worn Adjust valve (lash) to manufacturer’s
specifications.
Spark plug dirty, wrong gap or wrong
type
Clean, adjust gap or replace spark
plug.
Pressure is too low and/or pump runs
roughly
Worn or wrong size tip Replace with tip of proper size.
Inlet filter clogged Clean. Check more frequently.
Worn packings, abrasives in water or
natural wear
Check filter. Replace packing.
Inadequate water supply Check water flow rate to pump.
Fouled or dirty inlet or discharge
valves
Clean inlet and discharge valve
assemblies. Check filter.
Restricted inlet Garden hose might be collapsed or
kinked. Check hose and straighten to
remove kinks.
Worn inlet or discharge valves Replace worn valves.
Leaking high-pressure hose Replace high-pressure hose.
Water leaks from under pump mani-
fold
Worn packings Install new packings.
Water on oil side of pump Humid air condensing inside crank-
case
Change oil as specified in Mainte-
nance Chart, page 11.
Worn packings Install new packings.
Oil seals leaking Install new oil seals.