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  1. #1

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    1997 GP1200 started leaning to the right when going over 30mph

    I have this same thread on another website but I'm posting it here as well since I really need some help trying to solve this problem.

    I got the ski from the original owner (my brother) about 5 yrs ago. He was absolutely meticulous about it. Ski has been trouble free with the exception of having to replace the fuel sender.

    The first time out this summer in June, we noticed the ski was listing to the right when underway. I thought that maybe it was just strong winds but we've had the ski out a couple of times since and it most certainly is leaning to the right when exceeding about 30mph. It has never done this in previous years.


    I spent some time yesterday under the ski looking to see if I could find a "smoking gun." Nothing loose, abnormal looking or missing. Both tabs were in place and all grate and ride plate bolts were tight. The hull bottom was scratched but otherwise appeared normal. The sponsons are set where they've always been.


    I took it out for a ride today and it is most certainly listing to the right when I go faster than 30 mph. Slower than that and it rides normally. Go faster and the ski leans to the right. It gets pretty bad the faster that I go and it feels very unstable leaning like that. Pretty much can't really go WOT.


    I punched it from a standing start and the ski would jump up on plane just like normal but after about one second, it would lean over to the right. I tried this 3 times and it did the same thing every time.


    When I got the ski home, I checked to see if maybe there was a bunch of water in the hull. Maybe a cup but not any more.


    Guys, I really need some help on this one. Right now, the engine runs like brand new but the ski is not ride worthy. I suspect something might be wrong with the hull. Maybe it's flexing due to water pressure or force as I go faster. Does anyone have any ideas on what I should check?


  2. #2
    CJ's gpr's Avatar
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    never heard of leaning to the right but if it turns to the right then the nozzle/steering cable needs to be aligned.

  3. #3

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    No, it's not turning to the right, it's leaning to the right. Like its torquing over. This problem just started this year and it had never done it before.

  4. #4

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    Look under the hull again there are two small trim tabs made out of plastic near the back of the hull be sure both are still there and they are both tight! If one is loose or missing this will cause this problem. Also check the sponson hights by measuring then. If I rember correctly this ski has adjustable sponsons and somthing could of slipped on the adjustment. Tommy Jordan

  5. #5

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    Quote Originally Posted by 2fast4u View Post
    Look under the hull again there are two small trim tabs made out of plastic near the back of the hull be sure both are still there and they are both tight! If one is loose or missing this will cause this problem. Tommy Jordan
    They are both there. Tomorrow I'll confirm that they're tight. Thanks, Tommy and CJ for your replies. I really want to get this ski rideable again.

  6. #6

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    I edited my post to check the sponson hight also, Tommy Jordan

  7. #7
    Echo's Avatar
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    Quote Originally Posted by 2fast4u View Post
    I edited my post to check the sponson hight also, Tommy Jordan
    I agree double check the sponsons. Try to move the right one with pressure to make sure it is good and tight. My 99 leaned right a little not a lot with both factory sponsons in the lowest position. Moved the left one up about two turns proble solved.

  8. #8
    mudslanger's Avatar
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    Something else to check is the trim make sure the nozzle is not pointing down. if it is try riding it with the trim straight out level or pointing up. if you have a problem with the cables sticking or out of adjustment this may causing the nozzle to be stuck down. this will cause the jet stream to push up on the rear of the ski at faster speeds causing the ski to be unstable and cause it to lean from one side or another. it may not be the problem but worth checking.

  9. #9
    I had this issue with my GP1200 (1997 model) quite a few years ago. It was my plastic tabs causing the issue. If your sponsons are on tight,,,and you are SURE there is no water in the bottom of your ski...double check for this....then replace those plastic tabs with a set of steel ones. I did that and my problem disappeared. The plastic tab on my right side was flexing under a load and it caused it to lean my ski as soon as it picked up some speed. It may look okay but I will bet it is your issue...assuming you have no broken grate, loose sponson or water sitting in your hull. If they are plastic tabs REPLACE them with the metal ones. This was a big problem on the early GP1200s and mine was one of the first ones manufactured in 97. Still have it today and it still hits just over 60 with only a few mods.

  10. #10
    By the way, the early 97s had a hull issue....hull was thin and flexed under the bow and it eventually cracks where the top indented V was. There was an EC released to strengthen the hull (The bastards never contacted me about it!!) and it was applied to many of them. By the time I found out about it they said the program had ended and there were no more fixes being applied. So I was never given the modifications. My hull did crack and I have epoxied it several times and poured fiberglass inside on the hull too. It has been holding okay for the last five years. See if you have this problem or if the EC was applied. I think the EC was reinforcements on the bars where the front of the engine sat and something else up near the front bow under the foam. The early 97s also needed a 5 degree up nozzle change to get some extra speed out of them. I think that nozzle change became standard on the later Gp1200s.

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