Operation Section
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Problem Probable Cause Corrective Action
Fuel container almost empty LPG Vapor from liquid outlet
z Fill fuel container
z Do not exceed 80% of liquid capacity
Excess flow valve closed Reset excess flow valve
z Close liquid valve
z Wait for a “click” sound
z Slowly open liquid valve
Clogged fuel filter Repair/replace as required
z See Maintenance Section, LP Fuel
Filter replacement
Plugged fuel line Remove obstruction from the fuel line
z Close liquid fuel valve
z Using caution, disconnect the fuel line
(some propane may escape)
z Clear obstruction with compressed air
z Re-connect fuel line
z Slowly open liquid fuel valve & Leak
test
Pressure regulator freezes Check level in cooling system
z Must be full, check coolant strength
z -35F minimum
Check coolant hoses
z Watch for kinks and/or pinched hoses
z Verify one pressure hose and one
return hose
Fuel Lock-off malfunction Repair/replace Fuel Lock-off
z See G643E Engine Service Manual
Incorrect idle speed or ignition
problem
See Advanced Diagnostics
Will Not Run
Continuously
Engine Mechanical See Engine Service Manual
Fuel container almost empty LPG Vapor from liquid outlet
z Fill fuel container
z Do not exceed 80% of liquid capacity
Will Not
Accelerate/Hesitatio
n During
Acceleration
Excess flow valve closed Reset excess flow valve
z Close liquid valve
z Wait for a “click” sound
z Slowly open liquid valve
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