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  1. #1

    Water in the hull...where is it coming from?

    I am having a problem that I cannot figure out what the cause is. I left my 94 SL750 in the water this past weekend over night and it was really really full of water when I checked on it in the morning. I put it up on the trailer and did a thorough check and am 100% sure that there is no leak in the hull. I suspect that the only area that could be leaking is right near the driveshaft?!?!? Is this common?

    After pulling the drain plug and getting all the water out, I decided that it would not be a good idea to leave it in the water for an extended period of time until i get this issue resolved. I put it in the water again though and ran it for a short amount of time and did some tuning on it while in the water and it continued to get a decent amount of water in the hull.

    Is my presumed leak location a common problem or are there other areas on the boat that I should be checking as well? And what can i do about leaks in these areas?


  2. #2

    seal leak

    the seal maybe leaking i just fixed mine

  3. #3
    Moderator beerdart's Avatar
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    Driveshaft seal is the most common. Tilt it up on the trailer and fill the back of the hull with water and see where its coming from.

  4. #4
    So most likely it should leak back out of the drive shaft seal when tipped up on the trailer?

    How do I fix the drive shaft seal? Do I use sealant or is there a part I need?

  5. #5
    Goliath's Avatar
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    On my 2003 Virage some water comes out of the flushing hose when ever it is ran. Not sure if your model has one of those though.

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by kepneriphone View Post
    ...How do I fix the drive shaft seal?
    ...is there a part I need?
    Do a search for through-hull bearing or seal.

    The entire through-hull bearing assembly can be purchased whole and replaced entirely, or if it is not the very old crimped metal type, the shaft seals and internal bearings can be removed and replaced.

    The seals and bearings are standard sizes, and the specs were posted somewhere on here a while back. Can be purchased from most machine or automotive bearing suppliers. Any machine shop can replace the bearings and seals, or you can do it yourself with a few tools and some care.

    Note that sometimes the leak is not through the actual bearing assembly, but behind it, where it is attached to the hull itself. There is a plastic threaded sleeve that goes through the hull to the jet pump area, and if the retaining nut comes loose, water will leak in there.
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    Last edited by K447; 07-07-2008 at 03:41 PM.

  7. #7

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    I had to replace my hull bearing not too long ago. But I also found a small leak in one of the lines that bring water in for cooling the engine

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Goliath View Post
    On my 2003 Virage some water comes out of the flushing hose when ever it is ran...
    Then the flush connection is leaking, and should be fixed.

  9. #9
    Goliath's Avatar
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    Quote Originally Posted by K447 View Post
    Then the flush connection is leaking, and should be fixed.
    I mean when I am riding. Not when I am flushing it out. Only a little bit comes out because the ball that has the hole in it does not block all water from leaving the hose.

  10. #10
    Quote Originally Posted by paramuir View Post
    I had to replace my hull bearing not too long ago. But I also found a small leak in one of the lines that bring water in for cooling the engine
    How big of a job is replacing the hull bearing?

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