G424 Service Manual Adjustment and Troubleshooting181
Problem Probable Cause Probable Solution
Difficult to Start 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 Test pressure regulator operation
malfunction • Use test kit
• Install primary pressure gauge
• Install secondary pressure gauge
• Crank engine and observe readings
on pressure gauges
• Compare readings to specifications
• If readings are out of specrepair/replace
pressure regulator
Air filter clogged Check air filter
• Clean/replace as required
Engine Mechanical See Troubleshooting section
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