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  1. #1
    Dixieboy Dixieboy's Avatar
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    Rattle/knock at idle

    I have a 98 GTX Limited that makes a Rattle/knocking sound in the Water if the idle is below 1400 rpm. Sounds almost like a knock but just a slight rpm increase and it goes away. Ski performs well otherwise and will run 6860 rpm at WOT. I have owned this ski for two summers and it has always done this. I have greased as discribed in the forum. Should I look for something or is it ok. Any advice appreciated. Thanks


  2. #2
    flyin' the friendly skies airbornexp's Avatar
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    Quote Originally Posted by Dixieboy View Post
    I have a 98 GTX Limited that makes a Rattle/knocking sound in the Water if the idle is below 1400 rpm. Sounds almost like a knock but just a slight rpm increase and it goes away. Ski performs well otherwise and will run 6860 rpm at WOT. I have owned this ski for two summers and it has always done this. I have greased as discribed in the forum. Should I look for something or is it ok. Any advice appreciated. Thanks
    turn your idle up a tad...it will go away. mine did the same thing at low idle.

  3. #3
    96XPSS's Avatar
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    Stock idle is 1500 rpm in the water. Just adjust it up.

  4. #4
    Quote Originally Posted by 96XPSS View Post
    Stock idle is 1500 rpm in the water. Just adjust it up.
    Actually, the manual says 1400 for the 951 for some reason.

  5. #5
    96XPSS's Avatar
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    Quote Originally Posted by Piranha Performance View Post
    Actually, the manual says 1400 for the 951 for some reason.
    Really? Hmm...didn't know that. My would be thumping too much if that low...

  6. #6
    Quote Originally Posted by 96XPSS View Post
    Really? Hmm...didn't know that. My would be thumping too much if that low...
    Ya, my 2000xpl does idle lumpy at 1400 too. I keep it at 1500.

  7. #7
    Dixieboy Dixieboy's Avatar
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    thanks for all the advice. I'll idle
    up and let'er rip

  8. #8
    dghal's Avatar
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    it is probably just the pump rattling,, would not hurt to check the oil in the cone,

    since in 2 summers you might not have done that

  9. #9

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    I agree that it is the pump rattling. Turn the idle up a bit and it should go away. If that doesn't work, you might want to check to see that the anti-rattle pusher and spring in the pump cone are installed and working correctly. Here is a link to a video about how the anti-rattle pusher/spring works.

    [/URL]

    Dan (drb)

  10. #10
    "Tearing it up on the water" seadoobutch787's Avatar
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    On my 96xp it will rattle also at low rpms through a no wake. Im thinking it is the pipe rattlling against the underside of my seat. That's where my noise comes from.

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