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  1. #1
    PWCToday Newbie
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    Issues after sitting in the water

    Hey guys, my 99' GP1200 sat in the fresh water for about a month which was not intended.


    I went to get it last week and it started and rode fine for a few minutes but then it was almost like it slipped and the engine revs but the craft barely moves. It would go about 10 mph but if you increased throttle the engine revved but it was if the impeller was slipping.


    Ran perfect before sitting in the water and was very responsive at first the other day. I assume that it ingested something or perhaps it has something to do with the lake slime but since I am a PWC newb I thought I would ask to get some likely causes to help troubleshoot. I am assuming it ingested something.

    Thanks
    Alan

  2. #2
    PWCToday.com Is My Home Away From Home don37725's Avatar
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    Re: Issues after sitting in the water

    If it was lake slime or caused by sitting it would have slipped right away - If on trailer crawl under and look backwards through intake grate for weeds or rope or the like - also use strong flashlight and look into pump outlet - clear the pump and go ride

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  3. #3
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: Issues after sitting in the water

    Could have stripped drive shaft splines.....

  4. #4
    PWCToday Newbie
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    Re: Issues after sitting in the water

    Grumpy I sure hope not but I just went out and did a visual inspection of the intake and impeller from both ends and I do not see any obstructions. Any other obvious things to check other than stripped drive shaft splines? Any way to confirm or rule out this diagnoses without tearing it apart?

    Thanks
    Alan

  5. #5
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: Issues after sitting in the water

    You would have to pull the pump...if you are lucky the splines havent locked up & it will come apart but worst come to worse the ds can be cut.

  6. #6
    PWCToday Newbie Cyberduk's Avatar
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    Re: Issues after sitting in the water

    One other thing, although unlikely, is the PTO coupler threads have spun. I've had it happen on a VX before. The shaft was still good but the coupler on the shaft side had spun the threads off.

  7. #7
    PWCToday Newbie
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    Re: Issues after sitting in the water

    Quote Originally Posted by Cyberduk View Post
    One other thing, although unlikely, is the PTO coupler threads have spun. I've had it happen on a VX before. The shaft was still good but the coupler on the shaft side had spun the threads off.
    I'm back. Ski sat all last summer but I am going to fix it this year. To that end I could see no obstruction on shaft or impeller so I pulled the nozzle, impeller and shaft. The splines are sharp and the impeller looks new. Wear ring looks good too other than small burr downstream of the closest tolerance to the impeller.

    Now I'm worried CyberDuke might be right since I can find no obvious problem here. How would one test whether the PTO is at fault? If those splines were stripped wouldn't there be signs of damage on the shaft splines too? Also if the PTO stripped wouldn't you be dead in the water vs able to move fine at slow speed?

    Thanks
    Alan

  8. #8
    PWCToday Newbie Cyberduk's Avatar
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    Re: Issues after sitting in the water

    It has to be the coupler shaft AKA intermediate shaft. 63M-51323-01-00.

  9. #9
    PWCToday.com Is My Home Away From Home Chester's Avatar
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    Re: Issues after sitting in the water

    Try it in the water again. You could have had a small stick stuck in the impeller. Sometimes just the act of pulling it out of the water on the trailer will wash it out. A small 2cm stick stuck on the impeller will make it cavitate and do exactly what you described.

    Chester
    Speed is very expensive. How fast do you want to spend?

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  10. #10
    PWCToday.com Is My Home Away From Home john zigler's Avatar
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    Re: Issues after sitting in the water

    Quote Originally Posted by Chester View Post
    Try it in the water again. You could have had a small stick stuck in the impeller. Sometimes just the act of pulling it out of the water on the trailer will wash it out. A small 2cm stick stuck on the impeller will make it cavitate and do exactly what you described.

    Chester
    Yup. Have had this happen more than once.....

    Have also seen stripped splines, and couplers though.....
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