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Thread: Bobcat 250

  1. #1
    Join Date
    Jan 2012
    Location
    Metro Detroit, MI
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    182

    Default Bobcat 250

    I have a newer Bobcat 250 at work that has everyone stumped. It is the only gas welder we have. I am a diesel mechanic which is good because we have 20 diesel welders but only one gas SN# MA180071h . The motor doesn't run it cranks, sparks, and I have fuel after the fuel pump is there something I am missing? I can get it to fire and run for a moment on starting fluid. if i poor gas in the carburetor it will sputter and run for a minuet then die. The carburetor is clean. The motor is a Kohler SN# 4013403941. Is there some kind of electric shut off or something. Thank you in advance.
    Never Satisfied

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    Timfrank88@live.com

  2. #2
    Join Date
    Aug 2007
    Posts
    721

    Default

    What about the low oil shut off switch, could this be the culprit?
    Nick

  3. #3
    Join Date
    Jan 2012
    Location
    Metro Detroit, MI
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    182

    Default

    I know it has oil but how does the switch work? Stop spark? because I have spark? How would I test it?
    Never Satisfied

    Millermatic 211
    Maxstar 150STL
    Metabos
    Kennedy Maintenance Pro Full
    Makita Cordless 18v Li-Ion
    Stihl TS 420

    Timfrank88@live.com

  4. #4
    Join Date
    Dec 2012
    Posts
    11

    Default

    My honda on my compressor was doing the same thing. I thought my carb was clean. I was wrong. Took carb apart, pulled float needle and ran a piece of wire ( from a twist tie off a loaf of bread ) thru the tube . Put back together and it fired up first pull. All this done after i sprayed a whole can of good carb cleaner thru it and it still wouldn't run. If you are getting gas to the bowl that may be your problem

  5. #5
    Join Date
    Aug 2007
    Posts
    721

    Default

    Tim,
    I remember reading on the forum that if the switch failed it could cause the unit not to start. I could be wrong, but I seem to remember something like that. Maybe we could do a search. I am sure tomorrow when Cruizer or Duane sees this you will get your answer.
    Nick

  6. #6
    Join Date
    Jan 2012
    Location
    Metro Detroit, MI
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    182

    Default

    Thanks Nick yea I'm hoping its something like that. I am not a small engine guy. I don't think it's the carburetor one of my coworkers cleaned it. I didn't take the carb apart myself but he is pretty reliable. I forgot to mention the welder has less than 125 hours on it.
    Never Satisfied

    Millermatic 211
    Maxstar 150STL
    Metabos
    Kennedy Maintenance Pro Full
    Makita Cordless 18v Li-Ion
    Stihl TS 420

    Timfrank88@live.com

  7. #7
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,832

    Default

    Try bypassing the low oil switch.
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  8. #8
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,623

    Default

    Just behind the carb sits the fuel shutdown solenoid, perhaps the wire that runs it came off.

    Nothing to do with oil pressure switch, as you wouln't get any spark
    Last edited by cruizer; 12-12-2012 at 08:33 PM.

  9. #9
    Join Date
    Dec 2004
    Location
    Maryland
    Posts
    134

    Default Engine won't start

    You can go to opeengines.com and download the manual for that engine or look at the parts breakdown for free, they are a online kolher dealer.

  10. #10
    Join Date
    Dec 2007
    Location
    Oklahoma
    Posts
    696

    Default

    Quote Originally Posted by Rezeppa View Post
    Thanks Nick yea I'm hoping its something like that. I am not a small engine guy. I don't think it's the carburetor one of my coworkers cleaned it. I didn't take the carb apart myself but he is pretty reliable. I forgot to mention the welder has less than 125 hours on it.
    The fuel cut-off solenoid ( already mentioned by Cruizer) will sometimes gum up and ethanol will corrode the solenoid stem.

    Easy to clean if gummed up and easy to replace if corroded.

    If gummed up, sometimes you can tap on the solenoid while the engine is being cranked and get it unstuck.

    Griff
    Last edited by griff01; 12-14-2012 at 07:37 AM. Reason: clarification

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