Filling 3/4" hole in transom

Old 03-22-2020, 12:52 PM
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Default Filling 3/4" hole in transom

I need to fill a 3/4" below-the-waterline hole in a transom (24' center console). It's an old transducer cable hole that was well-sealed but I've removed all sealant and will sand the interior of the hole to ensure no remnants left in the hole. The transom is thick (maybe 3"), core seems very dense. Options I have available: marine tex or West Six 10 thickened epoxy (I also have some lightweight glass mat that I can use with the Six 10). My current thinking is to use the Six 10 and small pieces of glass mat, maybe starting with a larger piece of mat on the inside as a backstop for the epoxy and mat. Thoughts? I'd rather use something I have on hand than have to buy anything, but if neither of those options are right I'll do what's necessary. At some point I'd like to match, or at least roughly match, the repair to the boat color (white) - if I use the Six 10, can I later gel coat over it? I have a gel coat patch kit that I can use if that's an option.
Old 03-22-2020, 03:28 PM
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3/4" stainless bolt with flat washers and 5200
Old 03-23-2020, 04:24 AM
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I suggest cleaning the hole well, then epoxy a 3/4” dowel, leaving enough room on both ends for some gelcoat.
Old 03-24-2020, 07:27 PM
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The 3/4" dowel epoxied in place is a good suggestion but I would want a fiberglass patch on the ends. After the epoxy has set grind it down about 1/8" or more and about 1.5" radius around the hole. Then patch it with fiberglass and epoxy. After that is cured grind it smooth and just below flush and apply two part epoxy filler. After the filler is cured sand it slighly lower than flush, you want room for primer and paint so the repair is not higher than the rest of the hull. Prime it with epoxy primer and paint with your choice of paint, could be a simple one part enamal or a two part urethane.

I would check US Composites or Jamestown Distributors for materials.

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