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Thread: Hull trueing

  1. #1
    Nonstop, all day, everyday. 01xdime's Avatar
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    Hull trueing

    Well since i have the engine out of the GTX i'm thinking about draining the fuel tank and figuring out how to roll it onto it's side so i can try my hand at trueing the hull. From what i've heard and read before, the idea is to straighten and sharpen the strakes. I was gonna get a straight edge, sand paper, and some marine-tex. Anyone know if thats the right idea? I won't have this opportunity again for some time.


  2. #2
    EZ Dock of Long Island Shibby1485's Avatar
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    xdime... our minds are thinking alike... i'm looking around for a local marine performance shop to take on this task before i try my own hands at it.

    i assume most people read about this...?

    http://www.sea-doo.net/board/thread.asp?threadid=80677

  3. #3
    Legend in my own mind Sirhc7897's Avatar
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    The idea is to make the last few feet of the hull as "true" as possible...

    There are all kind of imperfections in the molds and if you take a straight edge you can normally see little dips or valleys in the rear of the hull. I know on the Polaris skis they actually used to mold a little dip into the rear of the hull to keep the nose (and speeds) down. You want to sand it down so that it is perfectly flat (get all those little dips, bumps and hooks out of it...

    You don't have to do it to the entire hull just on the wetted area when you're on plane (normally the back half at the most)...

  4. #4
    Nonstop, all day, everyday. 01xdime's Avatar
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    Yeah Steve you showed me that yesterday. I'm interested yet skeptical. I think truing the hull is something anyone with a lil know how could do. I could also be very wrong. As far as how much it costs to do it yourself or send it out i think those of us with normal money problems would agree that the do it yourself route may be better off. I'm going to do a lil more research and then give it a shot.

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    Site Admin Green Hulk's Avatar
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    You are on the right track. Fasten the sandpaper to a 2x4. You want something long and flat.

  6. #6
    jack's Avatar
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    Quote Originally Posted by Green Hulk
    You want something long and fat.
    That just didn't seem right!

  7. #7

    Re: Hull trueing

    Quote Originally Posted by 01xdime
    Well since i have the engine out of the GTX i'm thinking about draining the fuel tank and figuring out how to roll it onto it's side so i can try my hand at trueing the hull. From what i've heard and read before, the idea is to straighten and sharpen the strakes. I was gonna get a straight edge, sand paper, and some marine-tex. Anyone know if thats the right idea? I won't have this opportunity again for some time.
    I hope you do this. I have been wanting to do it but not sure how to start. From all I read it makes since to work. The Gti/GPR looks to have sharpened strakes....

    You would think building it up with marine-tex then sanding it down would do the job.

  8. #8
    EZ Dock of Long Island Shibby1485's Avatar
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    well for the $$ advertised on the other site, it's steep! i'd pursue it on my own before i paid close to 900 bones.

    ultimately... my hesitancy is that i'm gonna have to pull the motor out of my baby flip it over in some kind of stand and work it and repaint it.... i just hate to pull a motor out of a ski when there is nothing wrong with it.

  9. #9
    Legend in my own mind Sirhc7897's Avatar
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    You know I know the guy at Watercross of Texas used to true the hulls with the motor in...

    I believe he drained all the fluids and then stood them on end...

  10. #10
    EZ Dock of Long Island Shibby1485's Avatar
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    thought this was a article worth posting from a GPR hull truer... good pics and explanations.

    http://extremeteamracing.com/00-02GP1200Rmods.htm

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