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IOUBLESHOOTING
PROBLEM
Engine Will Not Start
3r Hard To Start.
ingine Misses
Or
Lacks
’ower
-ow Pressure
’ump runs extremely rough,
~ressure low.
Nater leakage from under
he manifold.
Nater
in
pump crankcase.
CAUSE
carburetor.
No gasoline in fuel tank
or
Water in gasoline or old fuel.
Choked improperly. Flooded
engine.
Dirty carburetor air filter
Spark plug dirty or improper
gap.
Spray gun closed.
Partially plugged air filter.
Spark plug dirty, wrong gap,
or wrong type.
Incorrect ignition timing.
Worn nozzle.
Belt slippage.
Air leak
in
inlet plumbing.
Relief valve stuck, partially plug-
ged
or
improperly adjusted;
valve seat worn.
Inlet suction strainer clogged or
improper size.
Worn packing. Abrasives in
pumped fluid or severe cavita-
tion.
Inadequate water supply.
Fouled or dirty inlet or discharge
galves.
Worn inlet or discharge valves.
Leaky discharge hose
Restricted inlet or air entering
the
inlet
plumbing.
Inlet restrictions and/or air
leaks. Stuck inlet or discharge
valve.
Leaking H.P. seals.
Worn packing.
May be caused by humid air
zondensing into water inside
the
crankcase.
SOLUTION
Fill the tank with gasoline, open fuel shut-off
valve.
Check fuel line and carburetor.
and dry spark plug.
Drain fuel tank and carburetor. Use new fuel
Open choke and crank engine several times to
clear out the gas.
Remove and clean.
Clean, adjust the gap or replace.
Trigger spray gun.
Remove and clean.
Clean, adjust the gap, or replace.
Time engine.
Replace with nozzle
of
proper size.
Tighten or replace; use correct belts and replace
both
at
same time.
Disassemble, reseal, and reassemble.
Clean, and adjust relief valve: check for worn
and dirty valve seats.
Kit
available.
Clean. Use adequate size. Check more
frequently.
Install proper filter. Check flow available to
pump.
Clean inlet and discharge valve assemblies.
Replace worn va1ves;valve seats and/or
discharge hose.
Proper size inlet plumbing; check for air tight
seal.
Clean out foreign material, replace worn valves.
Replace seals.
lnsrall new packing.
Change oil at
3
month or
500
Hour intervals
us-
ing
Graco Crankcase Oil (other approved oil
every month or
200
hours) P.N.
801-144.
801-191
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