Doosan G430 LP Service Manual page 36

Problem
Will Not Start/FCV
Staying On
LP Engine G430 (3.0L)
Probable Cause
Fuel container empty
Liquid valve closed
Excess flow valve closed
Plugged fuel line
Clogged fuel filter
Faulty vapor connection
between pressure regulator
and carburetor
Fuel lock malfunction
Pressure regulator
malfunction
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Probable Solution
Fill fuel container
Do not exceed 80% of liquid capacity.
Open liquid valve slowly
Reset excess flow valve
Close liquid valve
Wait for click sound
Open valve slowly
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
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
Check connection
No holes in hose
Clamps must be tight
Watch for kinked and/or pinched
and/or collapsed hose
Check circuit wiring
Check safety switch
Check fuelock
Repair/replace fuelock as required
Test pressure regulator operation
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 spec
repair/replace pressure regulator
Troubleshooting