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I have a Miller bobcat 225 w/kohler engine. It was running fine and then it just died, it didn't choke out...it just died. So I checked the fuel..ok, I checked the fuel line..ok, I can tell the engine is not getting any fuel. Any suggestions?
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Symptom indicates fuel starvation but it is best to use something to verify the spark keeps sparking as it dies. If the spark is ok and the spark plug colour is fairly normal and not black and wet, indicating flooding or excess oil, it would be wise to assume fuel starvation and clean out the system thoroughly.
Check fuel pump and check carburetor bowl for stuck needle. If fuel was left in engine stuck needle or plugged jets. Confirm that choke is fully closing when cold.
Possibly the idler control circuit board. I changed out my fair share back when I worked on them. Also, check your idler solenoid. I can't remember if those pulled in to idle, or pulled in for high RPM's. May be something as simple as rust on the solenoid plunger.
The unit may need recalibrating the idle/run setting. Instructions found in manual at 8-6 (subaru engine) and 9-5 (kohler). Idle speed around 2200rpm. Simple screw adjustment. PDF manual here :- http://www.millerwelds.com/om/o4434l_mil.pdf
I had a problem like this a few days ago try taken of the air filter to were u can see the choke it may not be opening rite just cause it opens don't mean itsnot opening rite get a small spray bottle put gas in it and as u start ur welder spray the choke with with the gas a lil if it starts turn ur switch to run for while it workd for me if that don't maybe change the spark plugs
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