Will not start.. Discussion about troubleshooting Doosan

Doosan G25P-5:
Will not start.

Does any one have any information on the woodward fuel system. Have a unit that will not start unless you remove the orifice mounted on the side of the carb. housing. If you remove the orifice fitting and install a non restricted fitting, unit will run but will backfire through air filter under a load. This has the tier III emission. It has 2 trim valves is there a way to test the trim valves. Regulator was replaced due to the oil build up. I have no information on these units, Thanks. Model#G25P-5 Serial #ML-00805.

Posted 25 Apr 2013 14:34
Discussion started by GregM
Texas, United States

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Thanks for the info. the diaphragm in the carb. looks like new. Found a vaccum leak where the carb. mounts to intake, replaced gasket units been running fine. Thanks Again.

Posted 13 May 2013 10:46
Reply by GregM
Texas, United States

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sounds like a bad carb. the GM 2.4 had an issue with the tips on the spark plugs coming loose and cause a backfire which damaged the diaphragm in the carb. You can not get a diaphragm, only a complete carb. only way i know to test the trim valves is to use a scan tool and run them. should feel them clicking when it is running. any codes?

Posted 12 May 2013 02:16
Reply by dale_mc
Alberta, Canada

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