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  1. #1
    Join Date
    Jun 2009
    Location
    Shelton CT
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    179

    Default Bobcat 250 - hard starting?

    Anyone else have a problem with a bobcat 250 taking a while to start? seems like i have to do the hokey pokey with the choke to get it to finally turn over. I did notice a valve cover leak on it today, but i'm not entirely sure that would cause a hard starting. the machine is almost new, 280 hours on it.
    F450 crewcab flatbed
    Miller Bobcat 250
    Miller 8VS suitcase
    Millermatic 251
    Millermatic 180
    Miller Spectrum 375
    Miller Econotig & 150 STH
    Enough snap-on tools to prevent my future kids from going to college

  2. #2
    Join Date
    Dec 2007
    Location
    southern California
    Posts
    1,783

    Default

    Could be a clogged slow jet in the carb. Has it sat for awhile without being used?
    Millermatic350P/Python, MillermaticReach/Q300
    Millermatic175
    MillermaticPassport/Q300
    HTP MIG200
    PowCon 300SM, MK Cobramatic
    ThermalArc 185ACDC, Dynaflux Tig'r, CK-20
    DialarcHF, Radiator-1
    Hypertherm PowerMax 380
    Purox oxy/ace
    Jackson EQC
    -F350 CrewCab 4x4
    -LoadNGo utility bed
    -Bobcat 250NT
    -PassportPlus/Q300
    -XMT304/Optima/Spoolmatic15A
    -Suitcase8RC/Q400
    -Suitcase12RC/Q300
    -Smith oxy/propane
    -Jackson EQC

  3. #3
    Join Date
    Dec 2007
    Location
    Oklahoma
    Posts
    711

    Default

    Quote Originally Posted by HawkerMetalworks View Post
    Anyone else have a problem with a bobcat 250 taking a while to start? seems like i have to do the hokey pokey with the choke to get it to finally turn over. I did notice a valve cover leak on it today, but i'm not entirely sure that would cause a hard starting. the machine is almost new, 280 hours on it.
    Make sure the choke flap is actually closing when you pull out the choke knob.


    Griff

  4. #4
    Join Date
    Jun 2009
    Location
    Shelton CT
    Posts
    179

    Default

    yeah, it sat for a while. but i've run it for about 20 hours worth of work, wouldn't that have cleared it out by now?
    F450 crewcab flatbed
    Miller Bobcat 250
    Miller 8VS suitcase
    Millermatic 251
    Millermatic 180
    Miller Spectrum 375
    Miller Econotig & 150 STH
    Enough snap-on tools to prevent my future kids from going to college

  5. #5
    Join Date
    Dec 2007
    Location
    southern California
    Posts
    1,783

    Default

    Once the slow jet gums up, running the machine doesn't normally clear out the jet. The slow jet affects only starting and slow idle. Fast idle it runs on the main jet. You need to physically clean out the slow jet with a tip cleaning wire, or maybe try some Sea Foam in the gas tank for a couple tanks. I have this issue on my dirt bike, atc and portable generator if I don't shut off the tank valve and run them out of gas before storing them. Taking off the float bowl and running a wire up the slow jet usually clears it up. Too bad the welding machines don't have a fuel shut-off so you can run the carb out of gas before storing them.
    Millermatic350P/Python, MillermaticReach/Q300
    Millermatic175
    MillermaticPassport/Q300
    HTP MIG200
    PowCon 300SM, MK Cobramatic
    ThermalArc 185ACDC, Dynaflux Tig'r, CK-20
    DialarcHF, Radiator-1
    Hypertherm PowerMax 380
    Purox oxy/ace
    Jackson EQC
    -F350 CrewCab 4x4
    -LoadNGo utility bed
    -Bobcat 250NT
    -PassportPlus/Q300
    -XMT304/Optima/Spoolmatic15A
    -Suitcase8RC/Q400
    -Suitcase12RC/Q300
    -Smith oxy/propane
    -Jackson EQC

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