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  1. #1

    2008 rxt x 255 shuts off after going full throttle and letting off fast.

    this jet ski (2008 rxt x 255)is still under warranty.dealer changed everything possible.fuel pump,water box even the head it self.machine was down from last year my warranty expires in 4 days.i had it in water and it still has same problem if you go full speed and let off the gas fast it will shut off, it will not shut of if you let go of the gas easy.i would really want to sell it in good running condition since i bought a new 2012 rxp x .what do you think is the problem?


  2. #2
    mac_man_luke's Avatar
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    id be looking at the supercharger or pump bearings, maybe one is seized causing a stall from WOT

  3. #3
    GAV's Avatar
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    put a new idle bypass valve on it ( p/n 420963051 )
    see if that will fix it
    Probley just slow

  4. #4

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    Quote Originally Posted by GAV View Post
    put a new idle bypass valve on it ( p/n 420963051 )
    see if that will fix it
    Probley just slow
    +1. Sounds like there is an issue with the idle valve causing stalling when returning to idle

  5. #5
    idle valve thank you very much will try tomorrow.

  6. #6
    GAV's Avatar
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    let us no how you go

  7. #7

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    Was the idle bypass valve the fix?

  8. #8
    wotxxxsd's Avatar
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    Amazing that the stealership has replaced so many things and never fixed it.

    This is a great example of how the techs at a stealership don't know there ASS from a hole in the ground.
    Sounds like you have some good advise from the guys above.

    I'd have them extend the warranty since they haven't fixed the issue in all the time they had it.

    Good luck!!
    Rip on....

  9. #9

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    FYI, I had the same exact problem and the idle bypass valve was the fix.

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