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Thread: gp800 died

  1. #1

    gp800 died

    my gp 800 died the other day. just cruising along and it shut down. seemed like the starter was having a very hard time turning it over and wouldnt fire. got towed in. i charged the battery the next day and it cranked over but still didnt fire. did a compression test, front cylinder 120 rear 70. cant turn the drive shaft by hand. any help with this would be appriciated. thanks


  2. #2
    I wanna go FAAAAASTer!! CDW78's Avatar
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    Removed the head on the low cylinder and see what obvious damage has been done. Def no more trying to turn it over....posting pics will help people help you!

  3. #3
    just pulled the head. no obvious damage there

  4. #4
    Same ting happend to me was the crank seized how was the spark plug on the low comp side any signs of running lean

  5. #5
    Quote Originally Posted by jaguarr2012 View Post
    Same ting happend to me was the crank seized how was the spark plug on the low comp side any signs of running lean

    the spark plug was black on the low compression side, the other looked fine, are you saying your crank siezd?

  6. #6
    Ski Hacks MG's Avatar
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    You tried to turn the driveshaft with the spark plugs out, correct?

  7. #7
    Quote Originally Posted by CCW View Post
    You tried to turn the driveshaft with the spark plugs out, correct?

    yes, and then with the head off. the starter would crank it but it cant be turned by hand. if the crank seized, or a rod bearing went, would it show low compression on one cylinder?

  8. #8
    so it was a seized rod bearing. whats next fellas?

  9. #9
    fast96HX's Avatar
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    Is anything caught in the pump by chance?

  10. #10

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    New crank would be the best thing to do.

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