Doosan GC25P-3 User Manual

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LP Engine G430(3.0L) Troubleshooting
Problem Probable Cause Probable Solution
Poor High Speed Restricted exhaust system Check exhaust system
Performance/Lean
●
Measure exhaust back-pressure
Condition
●
Compare to specs
Engine mechanical See Troubleshooting section
Excessive Fuel Carburetor malfunction Check carburetor
Consumption/LPG
●
Remove air/gas valve assembly
Exhaust Smell/Closed
●
Clean air/gas valve and carb throat
Loop System Not
●
Check diaphragm for holes/damage
Working
●
Check air/gas valve for wear/damage
●
Repair/replace as required
Incorrect ignition timing Check ignition timing
setting
●
Measure timing @ time position
●
Measure timing advance @ run position
Incorrect full load air/fuel duty Verify full load air/fuel duty cycle
cycle
Engine mechanical See Troubleshooting section
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 spec repair/replace
pressure regulator
Air filter clogged Check air filter
●
Clean/replace as required
Weak ignition miss fire See ignition system
Vacuum Leak Replace fuel system vacuum hoses
Fuel pressure too high Replace/rebuild regulator.
Exhaust system leaks Repair exhaust system
Oxygen sensor failure Replace/reconnect oxygen sensor
FCV failure Replace/reconnect FCV
Commander failure Replace/reconnect commander

Doosan GC25P-3 Specifications

General

Brand	Doosan
Model	GC25P-3
Category	Engine
Language	English