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  • #16
    Cut it all out. Tie it all back together with new Fiberglass. You also have to grind all the gelcoat off anything that is getting new layers of fiberglass. Gel is not structural, so it has to go. Grind and sand down to the 'pink' reaching out as far as you need, up the stringers and bottom so you can lay in fresh fiberglass to tie it all back together.
    17 Foot '90 Bluewater
    Alpha 1 3.0 Merc - repowered in 2016
    now - 4.3L Vortec - Alpha 1 GenII
    Honda BF100L kicker
    Engine custom - Transom 0D65328 - Drive 0D648864
    If you ain't fishin, then yer working too much.

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    • #17
      So I reached a minor milestone today when I got the last of all the old transom removed. Just some tidying to do with the flapper disc, as well as prepping the existing gel/fibreglass to accept the new material. My marine grade fibreglass arrived yesterday, along with an 8' x 4' sheet of hardboard, to use as a template. It's lightweight and easy to cut and handle. My replacement gimble housing also arrived today!! Very happy with it as it's in great shape, having been fresh water used.

      Now a question. I intend to tidy up the worst of any lumps and irregularities around the existing transom, where the new transom boards will sit. But I imagine it's not going to be totally snug all around. So, what's the best material to fill any gaps that will help hold the new transom in situ ( along with fibreglass ). I've read about "peanut butter" and wonder is this what I'm thinking about.

      I'm happy and familiar with woodwork, but want to be sure about my fibreglass work. To that end, I was going to cover my new transom boards in resin, with a layer of chopped mat sandwiched between them. Then a new layer of chopped mat laid on the old transom, with the new transom board laid over that. Then about 4 or 5 layers of chopped mat on top, finished off with a layer of woven mat, all tabbed in as I go along. I also intend to route over the inner top edge of the new transom, to help the chopped mat to follow the shape, possibly running over the top and down onto the outside top edge of the existing transom, all properly keyed of course.

      I'm ok with screwing, clamping everything in place, leaving no holes or cuts unprotected, so my main queries are "peanut butter/filler" and construction method of the new transom. Any thoughts most welcome.
      1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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      • #18
        Here's Frisco boaters recipe video.

        Recommendation is use a LOT of peanut butter as the glue to not only attach the new transom plate but to fill all the voids as well. There are LOADS of forum posts showing how to make full width clamps with 2 x 4s and allthread bolts through the keyhole. Goal is to goop up enough PB, mixed slow, that when you clamp things up the PB oozes out all the way around the new plate.
        17 Foot '90 Bluewater
        Alpha 1 3.0 Merc - repowered in 2016
        now - 4.3L Vortec - Alpha 1 GenII
        Honda BF100L kicker
        Engine custom - Transom 0D65328 - Drive 0D648864
        If you ain't fishin, then yer working too much.

        Comment


        • #19
          Also have to get the surface within parallel specification so the new Gimbal Housing seals. Easiest way to do that is make a u-shaped gauge to slip over and test as you clamp down.
          17 Foot '90 Bluewater
          Alpha 1 3.0 Merc - repowered in 2016
          now - 4.3L Vortec - Alpha 1 GenII
          Honda BF100L kicker
          Engine custom - Transom 0D65328 - Drive 0D648864
          If you ain't fishin, then yer working too much.

          Comment


          • #20
            I feel like I've turned a corner today, when I got to spend a few hours working on the boat. I cut my template for the transom using hardboard, about 2-3 mm and very easy to work with. I hung the sheet on the outside of the transom and marked out the outline. This gave me the approximate shape, but not the dimensions, as the transom is narrower on the inside. But from there it was just a case of taking some relevant measurements and reference points on the inside and transferring them to my template. basically it meant reducing the outline marked on the template by about 1/2" on either side, as well as taking a strip off along the bottom mid point, to facilitate the section that houses the drain plug.

            First dry fit went well, then a little tweaking and all was good. I transferred the shape onto my first 3/4" ply, cut it out and its a very nice fit. I cleaned up the channel that the new transom will sit into and routed /rounded off the inside edge of the transom, to allow for a tighter, closer fit, where the corners can be a bit lumpy. It sits nice and snug all around and now I can cut my second transom board, using the first one as a template.

            I have some cleaning and tidying to do then, as well as taking the flapper disc to the existing glass/ gel to prepare it for tabbing. I intend to get my glass and resin on Monday and hopefully reassembly will start then. I'll look into the stringers beforehand though, and sort them out as and where needed, so I'll have everything nice and solid to work on. Happy days and thanks for the input thus far.

            As an aside, I mentioned that my replacement gimble housing arrived yesterday. It came from the States and arrived here in Ireland having first passed me by on route to Dusseldorf, then to Brussels, then back to the UK, before crossing the Irish sea to Dublin, then across country to Shannon before finally travelling south to me in Kerry. No wonder postage costs so much!!
            Click image for larger version

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            1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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            • #21
              That looks great.

              Amazing sometimes that round-about routes in shipping is cheaper than direct.


              As an aside, I always figured my Irish forefathers got transported out to the colonies for multiple legal transgressions. Proud of that, however. What great countries, Ireland, and the US are!

              Rick
              17 Foot '90 Bluewater
              Alpha 1 3.0 Merc - repowered in 2016
              now - 4.3L Vortec - Alpha 1 GenII
              Honda BF100L kicker
              Engine custom - Transom 0D65328 - Drive 0D648864
              If you ain't fishin, then yer working too much.

              Comment


              • #22
                id come to Ireland to help its on my bucket list but sadly the missus says my boat wouldn't make it on a tank o fuel teased me about building a sail boat ... the fire she unknowingly plays with ....
                project:https://forums.iboats.com/forum/boat-...r-2159-hardtop
                Previous project https://forums.iboats.com/forum/boat...rint-bass-boat
                Previous previous project/conversion https://forums.iboats.com/forum/boat...rsion-splashed

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                • #23
                  Yes, an Irishman passing through U.S. security was stopped and questioned. "Do you have a criminal record? " asked the guard. "Why?" answered the Irishman " Do I still need one?"
                  1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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                  • #24
                    Not a whole lot to report, except that I have both transom boards cut along with all my glass. Yesterdays weather wasn't great, so I headed off to my supplier and picked up all my glass fibre and resin. Hopefully it will clear up enough tomorrow to allow me to do any last grinding and prepping on the boat, so I can start rebuilding. I also have to cut out the small end sections of the "stringers" that run from the ends of the motor mounts to the transom and then rebuild them once the transom is sorted. So, getting there. watch this space...…………...
                    1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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                    • #25
                      The weather here is really fighting me. Every time I get togged out in overalls, woolly hat, face mask/respirator, protective goggles, set up the extension lead, gather the appropriate tool together, the rains come! But I've persevered and have almost all the cleaning/grinding done on the boat. Just some bits of the stringers to cut out in readiness for my new transom boards, both of which have been coated in resin to help seal them. Crazy winds blowing today, along with the accompanying rain, so I'm indoors...……..

                      The forecast shows Monday to be a really good day, which is when I have a hospital appointment at 1.30. two hours away! So that's Monday pretty well accounted for. Typical! But hey, it is what it is and things can only get better. I'm happy with the results so far and confident that it will be a better boat for the effort.
                      1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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                      • #26
                        I hear ya! Same kind of problem here, only different project. I'm building a mobile welding truck. Taking my old Chevy flatbed truck and redoing it. Took the bed off and stripped the paint and started building tank racks and in-bed water tank with wash down pump, etc, preparatory to painting the bed. Then had to strip the paint off the cab as well, since it has Chevy paint that is peeling (sorry, but I repeat myself). I'm finding that I prefer temperatures over 20 degrees in the shop. And doing paint work under 50 is impossible. Did you know you have to pull the front fenders all the way off the truck to remove the fender flares on a 2000 year truck?

                        Getting tired of temps in the teens day after day. Been a cold couple months here

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                        Last edited by Rick Stephens; Yesterday, 09:29 AM.
                        17 Foot '90 Bluewater
                        Alpha 1 3.0 Merc - repowered in 2016
                        now - 4.3L Vortec - Alpha 1 GenII
                        Honda BF100L kicker
                        Engine custom - Transom 0D65328 - Drive 0D648864
                        If you ain't fishin, then yer working too much.

                        Comment


                        • #27
                          That looks like an interesting project, and it's nice to have a big enough building to work in. Unfortunately, my
                          "man cave/shed" won't take my boat comfortably and access is a bit of a pain. One thing I don't have to contend with is snow! Our temperatures here have been a little bit unseasonably mild with averages of about 60. It's just that we've hardly had a day free from rain. But the forecast is showing an improvement, so watch this space. Regarding your fender removal, I've been there too often. Some things are just built by sadists!
                          1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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                          • #28
                            Sign up today
                            Todays weather was great, sunny and dry, so I got a good bit done. I'm ready to start fitting my new transom, which I intend to start tomorrow, weather permitting. I also investigated the rot in the old stringers and engine mounts, all of which will have to be replaced. I intend to run the new engine mounts the full length of the bilge, tying into the transom, unlike the current set up, where they reduce in size and separate into two small stringer type set ups. Why it was done like that originally,I don't know. I'm hoping to cut the gel/glass from the top of the mounts, as shown in the picture and install the new wood inside the cavity, properly glassed etc.

                            I'll be replacing the stringers that run parallel to the mounts by approaching them like the transom. Cut away the surface gel/glass and fit new marine ply, glass it all in and run it full length also, tying it into the transom.

                            Any thoughts or opinions appreciated. Click image for larger version

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                            1990 Wellcraft 250 Sportsman. Mercruiser 5.7

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