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Transom outer shell horizontal crack repair - I need advice

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  • Transom outer shell horizontal crack repair - I need advice

    Okay the transom rot is partially removed and I discovered the transom outer glass has a horizontal crack in it from the outboard putting stress on it. The crack goes all the way through.

    Before I move to replacing the transom wood, what do I search on for making a repair to the skin?

    From reading some posts on hull repair it looks like it needs to be reglassed on the inside first. Anything I should be worried about as far as it re-cracking due to its location? The crack is at least 12" long.

    Thanks,
    Jason
    Jason, 1966 Larson All American Lapline 16' in Dry dock

  • #2
    Re: Transom outer shell horizontal crack repair - I need advice

    the only way the repair will crack ! is if you do a bad prep job.....

    if the crack is a rip....."v" the edges in the inside..and scuff around the area
    clean with aceitone...
    .add oops super dooper peanut butter...(with chopped strand filler... see posts 1990 ish of the hull extension thread)

    scuff the inside area...clean with acietone .and add a layer of matt then a veil cloth...then matt then a finishing veil......or a full transom peice of 1708 is best.

    if it is not a rip....you can for go the peanut butter.....

    do the same from the out side.....if you are picky about having a "bump" there....you will need to fair it with a fairing compound....then paint....the whole repair....might take you 4 hours.....out side and in....(with out fairing)

    on the inside...make sure it is as smooth as you can get it or when you install the transom there will be a high spot where the repair is.....

    if a high spot on the inside is unavoidable....use another layer of 1708 over the whole thransom but cutting a hole where the high spot is.
    kinda like a doughnut, with the high spot in the middle.

    hope that helps
    cheers
    oops
    The Hull Extension Thread
    great info on all aspects on boat building with detailed information.

    https://forums.iboats.com/showthread.php?t=234392

    IN MEMORY OF Our friend SpinnerBait_Nut LESTER WRIGHT July 31, 1953 - Nov 26, 2008 RIP

    IN MEMORY OF Our friend Tashasdaddy Robert (bob) Griffis. October 27, 1948
    November 29 2010 RIP

    Comment


    • #3
      Re: Transom outer shell horizontal crack repair - I need advice

      btw....welcome to i boats
      The Hull Extension Thread
      great info on all aspects on boat building with detailed information.

      https://forums.iboats.com/showthread.php?t=234392

      IN MEMORY OF Our friend SpinnerBait_Nut LESTER WRIGHT July 31, 1953 - Nov 26, 2008 RIP

      IN MEMORY OF Our friend Tashasdaddy Robert (bob) Griffis. October 27, 1948
      November 29 2010 RIP

      Comment


      • #4
        Re: Transom outer shell horizontal crack repair - I need advice

        Thanks for the welcome Oops, you need an index for your thread


        I'll try to post some pictures tonight, I am going to repaint the entire boat anyway and I will be pretty particular on the cosmetic repair on the outside. Will probably be using seacast for the transom.

        Here is a link to the thread I started for the complete project: http://forums.iboats.com/showthread.php?t=278526
        Jason, 1966 Larson All American Lapline 16' in Dry dock

        Comment


        • #5
          Re: Transom outer shell horizontal crack repair - I need advice

          if you go seacast....forget about the big 1708 layups.....the seacast is structural....and will hold it just fine....but you still need to do the basic glass repair.

          and yeah....the extension thread is turning out to be monster big....an index is a good idea
          The Hull Extension Thread
          great info on all aspects on boat building with detailed information.

          https://forums.iboats.com/showthread.php?t=234392

          IN MEMORY OF Our friend SpinnerBait_Nut LESTER WRIGHT July 31, 1953 - Nov 26, 2008 RIP

          IN MEMORY OF Our friend Tashasdaddy Robert (bob) Griffis. October 27, 1948
          November 29 2010 RIP

          Comment


          • #6
            Re: Transom outer shell horizontal crack repair - I need advice

            Here is an overall view of the transom:


            And zoomed in on the crack:
            Jason, 1966 Larson All American Lapline 16' in Dry dock

            Comment


            • #7
              Re: Transom outer shell horizontal crack repair - I need advice

              yeah....someone tried to repair a rotten transom by bolting a peice of wood on the outside........your lucky you didnt loose your motoe and sink.

              there is also serious cracks in the gellcoat due to pressure on the transom....seacast or not.....id fix it the way i mentioned as well as a full peice of 1708 across the inner side of the transom
              The Hull Extension Thread
              great info on all aspects on boat building with detailed information.

              https://forums.iboats.com/showthread.php?t=234392

              IN MEMORY OF Our friend SpinnerBait_Nut LESTER WRIGHT July 31, 1953 - Nov 26, 2008 RIP

              IN MEMORY OF Our friend Tashasdaddy Robert (bob) Griffis. October 27, 1948
              November 29 2010 RIP

              Comment


              • #8
                Re: Transom outer shell horizontal crack repair - I need advice

                It was actually 1/4 plate aluminum. Ha ha yeah I just bought it and it has never been on the water with me in it luckily

                Thanks for the help, I wanna do it right!
                Jason, 1966 Larson All American Lapline 16' in Dry dock

                Comment


                • #9
                  Sign up today
                  Re: Transom outer shell horizontal crack repair - I need advice

                  its a common problem.
                  I found this when searching.
                  http://www.boatdesign.net/forums/mat...res-18939.html
                  sigpic
                  See FAQ Files.
                  https://forums.iboats.com/showthread.php?t=299680

                  Get the genuine factory service manual.
                  www.outboardbooks.com

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