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

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    • #3
      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
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      • #4
        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

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        • #5
          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

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          • #6
            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

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            • #7
              Try bypassing the low oil switch.
              MM250
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              22a feeder
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              • #8
                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, 09:33 PM.

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                • #9
                  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.

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                  • #10
                    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, 08:37 AM. Reason: clarification

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                    • #11
                      Ok I'm waiting on a new solenoid ill update if anything changes. Some dumbasss put the cover back on the welder yesterday so I had to pull it again.
                      Never Satisfied

                      Millermatic 211
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                      Makita Cordless 18v Li-Ion
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                      Timfrank88@live.com

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                      • #12
                        Bobcat 250

                        Sorry for the long delay in response this project got set on the back burner. I took the cover off the back of the welder and pulled the air filter housing tapped on the solenoid with a 8oz dead blow hammer turned the ignition boom fired right up. I didn't replace the solenoid I have a spare and if it acts up again ill replace it. Thank you all for the help easy fix.
                        Never Satisfied

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

                        Timfrank88@live.com

                        Comment

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