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Troubleshooting
6 311019L
Troubleshooting
Problem Cause Solution
Engine will not start Engine switch is OFF Turn engine switch ON
Engine is out of gasoline Refill gas tank. Honda Engines
Owner's Manual.
Engine oil level is low Check oil level. Replenish oil, if neces-
sary. Honda Engines Owner's Manual.
Spark plug is disconnected or dam-
aged
Connect spark plug cable or replace
spark plug
Cold engine Use choke
Fuel shutoff lever is OFF Move lever to ON position
Oil is seeping into combustion
chamber
Remove spark plug. Pull starter 3 to 4
times. Clean or replace spark plug.
Start engine. Keep sprayer upright to
avoid oil seepage
Engine operates, but displacement
pump does not operate
Pump switch is OFF Turn pump switch ON
Pressure setting too low Turn pressure adjusting knob clock-
wise to increase pressure.
Fluid filter (104) is dirty Clean filter. Page 22.
Tip or tip filter is clogged
Clean tip or tip filter. Manual 309741.
Displacement pump piston rod is
stuck due to dried paint
Repair pump. Manual 309250.
Connecting rod is worn or damaged
Replace connecting rod. Page 8.
Drive housing is worn or damaged Replace drive housing. Page 8.
Electrical power is not energizing
clutch field
Check wiring connections. Page 11, 12.
Reference pressure control repair. Page 13.
Reference wiring diagram. Page 23.
With pump switch ON and pressure turned to
MAXIMUM, use a test light to check for power
between clutch test points on control board.
Remove clutch wires from control
board and measure resistance across
clutch coil. At 70° F, the resistance
must be between 1.2 +0.2; if not,
replace pinion housing.
Have pressure control checked by authorized
Graco dealer
Clutch is worn, damaged, or incor-
rectly positioned
Adjust or replace clutch. Page 9.
Pinion assembly is worn or damaged Repair or replace pinion assembly. Page 9.