STX 1100 DI Problems
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  1. #1
    PWCToday Newbie
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    STX 1100 DI Problems

    Hello, about two months ago I purchased a used 1100 DI. The ski ran great the first time I took it out. Drove about 30 miles straight. I took it out again and the ski won’t get above 6000 rpms and after about 2/3 throttle it seems to loose power. But the ski ran fine besides that so I was just running it and wouldn’t go above 2/3 throttle. Then this past weekend I had it up north and ran it basically all day. The ski ran great but I was getting weird electrical issues. The dash was going crazy and would freeze the speedometer. I made sure the battery connections where fine and kept running the ski. Then the next day I was getting a battery error light on the dash and I would get a check engine warning when the ski was off but it would go away once the ski was running. Later on after running the ski I turned it off and went to turn it back on but the battery was dead. The battery looked old and had some damage to the terminal so I bought a new one and installed it. The battery warning light is gone but the engine warning light is still there as well the Speedometer goes crazy. Anyone have any ideas what my problem could be. I can take videos of the problems if that helps.
    Thanks!

  2. #2
    PWCToday Newbie
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    Re: STX 1100 DI Problems

    do you have enough water coming out the pisser....overheat?....fry computer?

  3. #3
    PWCToday Regular guy48065's Avatar
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    Re: STX 1100 DI Problems

    The computer isn't water cooled.
    96 & 97 1100Zxi

  4. #4
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: STX 1100 DI Problems

    Quote Originally Posted by PBS View Post
    do you have enough water coming out the pisser....overheat?....fry computer?
    The computer is water cooled, and if I recall properly the small water
    hose that feeds the computer can get clogged at the brass fitting on the
    exhaust manifold and front cover (flywheel).

    Quote Originally Posted by ParkerD View Post
    I took it out again and the ski won’t get above 6000 rpms and after about 2/3 throttle it seems to loose power.
    But the ski ran fine besides that so I was just running it and wouldn’t go above 2/3 throttle.
    I am curious about this ride. Would you post the date and location?
    I would like to know if the weather was responsible for the low power.


    Bill M.
    Last edited by wmazz; 08-05-2021 at 01:21 AM.
    Horsepower == Speed, RPM != Speed



  5. #5
    PWCToday Regular guy48065's Avatar
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    Re: STX 1100 DI Problems

    Quote Originally Posted by wmazz View Post
    The computer is water cooled...
    My bad. I looked at several STX1100 diagrams while trying to figure out my own overheat issue and I missed the unique difference to the DI version.
    96 & 97 1100Zxi

  6. #6
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: STX 1100 DI Problems

    Quote Originally Posted by guy48065 View Post
    My bad. I looked at several STX1100 diagrams while trying to figure out my own overheat issue
    Did you fix your STX?


    Bill M.
    Horsepower == Speed, RPM != Speed



  7. #7
    PWCToday Regular guy48065's Avatar
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    Re: STX 1100 DI Problems

    My overheating Zxi? Yes. The problem was a restriction in a little brass elbow that feeds water from the stator loop down into the expansion chamber where it goes on to fill & cool the water box.
    Everything else (hoses, fittings, gaskets, water jackets) was clean & clear.

    I was exceeding the 120*C max of a little temperature readout I had added. Now the highest it hits is 60*C on the surface of the water box.
    Last edited by guy48065; 08-13-2021 at 08:58 AM.
    96 & 97 1100Zxi

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