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Millerbobcat225gplus welding machihe w/onan16hp performer engine

Motor will not fire in start position when switch is released andn goes to the run position it will fire and pops loudly through the exhaust.can you help me?

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  • gj cruz Dec 27, 2008

    my machine has similar problems. i keep it covered but i thought mabe condensation could be a factor. when i release ignition to run or idle, it shuts off. but if i hold switch just past run position it will remain on. however i do notice strong smell of unburned gas fumes.

  • Carl Gehrke
    Carl Gehrke May 11, 2010

    Yep, I probably can help you. From your description of the problem it sounds like you might have a failed ignition system, the loud detonations you hear when the switch snaps back to run would be dieseling of the fuel/air that was last in the cylinders.
    First thing is to see if you're going to have to figure this out or if we can get your local Miller service center to do it on the company dime :-) What please is the serial number of the machine? If I know this I can find out its official birthday and we can see if it's younger than 3 yrs old.
    Carl


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Carb is probly gumed up. I would put in a good dose of fuel injector cleaner in the fuel and start the engine llet it run 5 minites shut idown. What 2 days then restart,it should run fine. PS put sunoco ultra fuel in tank before you put in clean4er.drain tank before you start.

Posted on Aug 11, 2012

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Engine needs tuned up and carburetor cleaned out also you need to check for a spark and have valves adjusted

Posted on Dec 28, 2008

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