Do you have a carburetor on this unit? If so this is your problem, a sticky or bad needle valve can cause your problem, along with a bad float adjustment. Good Luck Friend.
SOURCE: miller bobcat 225g plus welding problem
If the idle is not working, then it is either you idle solenoid attached to the carberator or your idle board is bad. If you apply 12Vdc to the idle solenoid is should move, if not then the solenoid is shot, no good. If it works then you idle board is bad. Also, check to see if you are 60Hertz by measuring at the outlet with a frequency meter. I recommend a Fluke meter. You should have 120Vac and 60HZ at the outlet. If the frequency is low then your engine speed needs to be increased. The idle solenoid could be causing all these problems.
SOURCE: miller bobcat 250 welder with kohler lp gas engine
Make sure that the idle is set at 40Hz. You do this by placing a frequncy meter on one of the 120Vac outlets. If frequency is low, the engine will run rough at idle. There is a 3/8 nut next to carberator that needs to be turned to the right to increase the idle speed.
SOURCE: I have a Miller bobcat 225 w/kohler engine. It was
Low oil pressure or level switch.The switch keeps you from killing the engine when theres no oil.
SOURCE: Bobcat Miller 225 won't start.
Check the oil safety switch maybe it is bad. It will stop running if low on Oil or wont start.
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