1978 OMC 140hp powerhead starter can hardly turns

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  • Beno


    Replies: 68
    Topics: 23
    #208714

    I have a OMC 140hp powerhead (140TL78C) 1978? serial J4989592

    I have a Deep cell fresh battery hooked up to it fully charged. When I engage the solenoid the flywheel does a slow Rrr- R- Rrrrr

    I can take my thumb and turn the flywheel (I can’t whip it around or anything, but I can turn the engine over with just my thumb)

    I Rr-r-rrr’d the flywheel over like 10-15 times, the starter gets so hot you cannot touch it. I removed the starter and cannot hold it, I have to wait for it to cool down.

    Anyone know of any good tests to do? should I test the starter somehow?

    thanks
    Ben


    dave-bernard

    US Member - 2 Years
    Replies: 1412
    Topics: 18
    #208717

    may just need a good cleaning.


    frankr

    US Member - 1 Year
    Replies: 5796
    Topics: 49
    #208731

    Might be burnt up if it got that hot?


    billw

    US Member - 2 Years
    Replies: 1528
    Topics: 45
    #208732

    When cranking there should be a MINIMUM of 9.5 volts between the starter terminal and ground. If there is good enough voltage, and the starter is as hot as you say, the starter is probably trash, like Frank says. And it DOES happen sometimes, with those starters, too. Bad connections and bad brushes are easier to explain how to troubleshoot than a burned up starter but ultimately, if that were the case, you wouldn’t be seeing the starter getting that hot.

    Long live American manufacturing!


    Beno


    Replies: 68
    Topics: 23
    #212046

    I got a new starter in and installed it. Turns over like no tomorrow.

    I would gather that some internal copper windings on the starter went bad over time.

    good learning opportunity.


    billw

    US Member - 2 Years
    Replies: 1528
    Topics: 45
    #212085

    It wouldn’t be the first one, that’s for sure. Glad it’s fixed.

    Long live American manufacturing!


    need2fish

    US Member - 2 Years
    Replies: 200
    Topics: 13
    #212113

    Smells just like burnt windings to me. Last time I took a starter for rewinding, it was just over $100.

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