G424 Service Manual Adjustment and Troubleshooting183
Problem Probable Cause Probable Solution
Won’t Run Continuously Faulty vapor connection Check connection
Accelerate/Hesitation between pressure regulator • No holes in hose
During Acceleration and carburetor • Clamps must be tight
• Watch for kinked and/or pinched and/or
collapsed hose
Throttle butterfly not opening Verify wide open throttle
Incorrect full load air/fuel duty Verify full load air/fuel duty cycle
cycle
Engine Mechanical See Troubleshooting section
Idle duty cycle too high Correct/adjust hardware failure
(above 50%)
Engine Stalls 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 connectionr 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
Vacuum leak Check for vacuum leaks
• Between carburetor and intake manifold
• Between intake manifold and cylinder head
Fuel lock malfunction • Check circuit wiring
• Check safety switch
• Check fuelock
• Repair/replace fuelock as required
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