Graco 2730B - Page 19

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Troubleshooting
Perform Pressure Relief Procedure (page 7).
Problem Cause Solution
Engine will not start or
is hard to start.
No gasoline in fuel tank or carburetor Fill tank with gasoline, open fuel shutoff valve.
Check fuel line and 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
andmake 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.
Spark plug dirty, wrong gap, or wrong
type
Clean, adjust gap or replace.
Gun not triggered Trigger gun while starting engine.
6.5 hp Briggs & Stratton model may
experience “vapor lock” due to gas type
and temperature
Allow unit to cool approximately 15 minutes
and restart.
Engine misses or
lk
Partially plugged air cleaner filter Remove and clean.
lacks power
Valve adjustment (lash) worn Adjust valve lash to manufacturer’s
specification.
Spark plug dirty, wrong gap, or wrong
type
Clean, adjust gap or replace.
Pressure is too low
d/
Worn or wrong size tip Replace with tip of proper size.
and/or pump runs
roughly
Inlet filter clogged Clean. Check more frequently.
roughly
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.
Worn inlet or discharge valves Replace worn valves.
Leaking high–pressure hose Replace high–pressure hose.
Water leaks from
under pump minifold
Worn packings Install new packings.
Water on oil side of
pump
Humid air condensing inside crankcase Change oil as specified in Maintenance Chart
(page 18).
Worn packings Install new packings.
Oil seals leaking Install new oil seals.