G424 Service Manual Adjustment and Troubleshooting182
Problem Probable Cause Probable Solution
Won’t Run Continuously Fuel container almost empty LPG vapor from liquid outlet
• Fill fuel container
• Do not exceed 80% of liquid capacity
Excess flow valve closed Reset excess flow valve
• Close liquid valve
• Wait for click sound
• Open valve slowly
Clogged fuel filter Repair/replace as required
• Close liquid fuel valve
• Using caution, disconnect fuel line
• Remove/replace filter element
• Clean fuel filter housing
• Open liquid fuel valve
• Leak test
Plugged fuel line Remove obstruction from fuel line
• Close liquid fuel valve
• Using caution, disconnect fuel line
• Clear obstruction with compressed air
• Re-connect fuel line
• Leak test
Faulty vapor connection Check connection
between pressure regulator • No holes in hose
and carburetor • Clamps must be tight
• Watch for kinked and/or pinched
and/or collapsed hose
Pressure regulator freezes Check level in cooling system
• Must be full
Check coolant strength
• -35F minimum
Check coolant hoses
• Watch for kinks and/or pinched hoses
• Verify one pressure hose and one return
hose
Incorrect idle speed Check idle speed
• Adjust idle speed to specification
Engine Mechanical See Troubleshooting section
Won’t Fuel container almost empty LPG vapor from liquid outlet
Accelerate/Hesitation • Fill fuel container
During Acceleration • Do not exceed 80% of liquid capacity
Excess flow valve closed Reset excess flow valve
• Close liquid valve
• Wait for click sound
• Open valve slowly
Clogged fuel filter Repair/replace as required
• Close liquid fuel valve
• Using caution, disconnect fuel line
• Remove/replace filter element
• Clean fuel filter housing
• Open liquid fuel valve
• Leak test
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