Troubleshooting - Graco G-Max 7900 Instructions Manual

Troubleshooting

Problem
Engine won't start
Engine operates, but displacement
pump does not operate
308870G
Cause
Engine switch is OFF
Engine is out of gas
Engine oil level is low
Spark plug cable is disconnected or
damaged
Cold engine
Fuel shutoff lever is OFF
Oil is seeping into combustion
chamber
Pressure control switch is OFF
Pressure setting is too low
Fluid filter (318) is dirty
Tip or tip filter is clogged
Displacement pump piston rod is
stuck due to dried paint
Roller bearings are worn or dam-
aged
Drive housing is worn or damaged
Troubleshooting
Solution
Turn engine switch ON
Refill gas tank. Honda Engines
Owner's Manual.
Try to start engine. Replenish oil, if
necessary. Honda Engines Owner's
Manual.
Connect spark plug cable or replace
spark plug
Use choke
Move lever to ON position
Remove spark plug. Pull starter
rope 3 or 4 times. Clean or replace
spark plug. Try to start engine.
Keep sprayer upright to avoid oil
seepage.
Turn pressure control switch ON.
Turn pressure adjusting knob clock-
wise to increase pressure
Clean filter. Page 31.
Clean tip or tip filter. Manual
309091.
Repair pump. Manual 308798.
Replace connecting rod. Page 10.
Replace drive housing. Page 10.
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