Troubleshooting - Graco 246343 Service Manual

Follow Pressure Relief Procedure,
page 4.
Problem
Engine will not start or is hard to start No gasoline in fuel tank or carburetor. Fill tank with gasoline, open fuel shut
Engine misses or lacks power
Low pressure and/or pump runs
rough
Water leakage from under pump
manifold
6

Troubleshooting

WARNING
Low oil.
Start/Stop Switch in Stop position.
Water in gasoline or old fuel.
Choked improperly. Flooded engine.
Dirty air cleaner filter.
Spark plug dirty, wrong gap or wrong
type.
Carburetor fuel jet plugged
Spray gun closed.
Partially plugged air cleaner filter
Spark plug dirty, wrong gap, wrong
plug type
Worn or wrong size tip
Inlet filter clogged
Worn packings, abrasives in water or
natural wear.
Inadequate water supply
Fouled or dirty inlet or discharge
valves
Restricted inlet
Worn inlet or discharge valves
Leaking high pressure hose
Worn packings
Cause
off valve. Check fuel line and
carburetor.
Add oil to fill to proper level.
Move switch to Start position.
Drain fuel tank and carburetor. Use
new fuel and dry spark plug.
Open choke and pull engine several
times to clear out gas. Use dry spark
plug.
Remove and clean air filter.
Clean spark plug, adjust gap or
replace.
Remove fuel bowl from carburetor.
Clean fuel jet.
Trigger spray gun while starting.
Remove and clean
Clean and adjust spark plug gap or
replace.
Replace with tip of proper size.
Clean. Check more frequently.
Check filter. Replace packings. See
Pump Service, page 8.
Check water flow rate to pump
Clean inlet and discharge valve
assemblies. Check filter.
Check garden hose, may be
collapsed or kinked.
Replace worn valves. See Pump
Service, page 8.
Replace high pressure hose.
Install new packings. See Pump
Service, page 8.
Troubleshooting
Solution
309578B