SoCal Jet Boats
Tech Talk => Gelcoat / Paint / Fireberglass Repair => Topic started by: Brad @ SCJB on February 05, 2007, 12:38:29 PM
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I am going to be replacing the wood in my transom soon. I need some help/suggestions on how I should do it.
I am using 3/4" Marine wood from Ganahl Lumber which was quoted just over $90 a sheet. Shit ain't cheap >:(
What should I use to bond the wood to the transom? Someone suggested using an Epoxy - what kind of epoxy?
Any suggestions on the fiberglass I should use. I will use a resin to coat it entirely, then matt to hold it in place.
Heres a picture of the madness..
(https://www.socaljetboats.com/cpg/albums/userpics/10002/normal_IMG_0818.jpg)
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I am going to be replacing the wood in my transom soon. I need some help/suggestions on how I should do it.
I am using 3/4" Marine wood from Ganahl Lumber which was quoted just over $90 a sheet. Shit ain't cheap >:(
What should I use to bond the wood to the transom? Someone suggested using an Epoxy - what kind of epoxy?
Any suggestions on the fiberglass I should use. I will use a resin to coat it entirely, then matt to hold it in place.
Heres a picture of the madness..
(https://www.socaljetboats.com/cpg/albums/userpics/10002/normal_IMG_0818.jpg)
I am no pro by any means but I passed on the marine grade ply wood . I would used birch cabinet ply wood .
-beerjet-
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I just got off the phone with Jim (Emanon Performance Marine) and he had some helpful suggestions.
So from the notes I have gathered. I should use Epoxy Resin for bonding the wood to the glass. I did some searching and theres several types or epoxy resin. Do you have any specific resin I should use? or any will do?
then for the glass, I can just use Bondo Fiberglass resin.....will this work?
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.bondo-online.com%2Ffileshare%2Fproduct_images%2F401NEW2.JPG&hash=bcebdc47da7ea44eaa878d8c39def3bbe16e9228)
and I assume I can use any old matt from home depot or whereever.
Also, you suggested using Sea Going Epoxy Putty ??? to fill the rotted area of the stringer. I couldnt find anything like that online, can you verify I spelled it correctly?
and one more thing.....he said to not use the marine wood. its pointless since I will be sealing it anyways.
Thanks again!
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Check this link out, you may have to register first;
http://www.badapplesracing.com/phpBB/viewtopic.php?t=589&start=15&postdays=0&postorder=asc&highlight=
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Just something to think about, if you use Epoxy based products, you won't have good luck laminating with polyester/vinylester products over the top of the epoxy stuff.
Anyhow, do do the work, make a good template, after all the bad wood is gone, test fit the template a couple of times to make sure it works. Cut 2 pieces from your plywood using the template. Make sure it matches up well, and test fit each piece against the transom. Then cut 2 pieces of mat with the template to match the wood pieces. When the inside of the transom is prepped (40-80 grit sanded) and cleaned with acetone, wait for the acetone to evaporate completely, then lay up the first layer of mat, the first layer of wood, clamp it all down to get out the air bubbles, and let it kick off. Then the second layer of mat, the second layer of wood, repeat the clamping, and let it kick off. After that, cover the entire thing with 2 layers of mat, a layer of cloth, and a layer of mat again. Something to note, The cloth needs to be laminated in between layers of mat to have any effect. It is kind of like the rebar in your repair and unless there is concrete on both sides of it, you might as well not have it there to begin with. That being said, I would laminate the first layer of mat, make sure it is nice and flat and rolled out good so there aren't any huge resin bumps that will continue to build through your lamination; then let it kick off. Then mix enough resin to do the second layer of mat, the later of cloth and the last layer of mat. After you're done just remember that any holes that are drilled through the wood need to be sealed with resin before anythign is installed, and then also sealed externally with 5200 or the like.
Chris
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Just something to think about, if you use Epoxy based products, you won't have good luck laminating with polyester/vinylester products over the top of the epoxy stuff.
Anyhow, do do the work, make a good template, after all the bad wood is gone, test fit the template a couple of times to make sure it works. Cut 2 pieces from your plywood using the template. Make sure it matches up well, and test fit each piece against the transom. Then cut 2 pieces of mat with the template to match the wood pieces. When the inside of the transom is prepped (40-80 grit sanded) and cleaned with acetone, wait for the acetone to evaporate completely, then lay up the first layer of mat, the first layer of wood, clamp it all down to get out the air bubbles, and let it kick off. Then the second layer of mat, the second layer of wood, repeat the clamping, and let it kick off. After that, cover the entire thing with 2 layers of mat, a layer of cloth, and a layer of mat again. Something to note, The cloth needs to be laminated in between layers of mat to have any effect. It is kind of like the rebar in your repair and unless there is concrete on both sides of it, you might as well not have it there to begin with. That being said, I would laminate the first layer of mat, make sure it is nice and flat and rolled out good so there aren't any huge resin bumps that will continue to build through your lamination; then let it kick off. Then mix enough resin to do the second layer of mat, the later of cloth and the last layer of mat. After you're done just remember that any holes that are drilled through the wood need to be sealed with resin before anythign is installed, and then also sealed externally with 5200 or the like.
Chris
thanks for all this useful information....its much appreciated!
Actually, we just started laying down mat on tuesday. I havent yet posted the pictures, but I will try to get around to it today....
I will definatly take your advice and try to encorporate it into what I have done already.
Heres the project thread with a ton of pictures:
http://www.socaljetboats.com/index.php?topic=11.0
-Brad
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i just finished referbishing my first boat. and boy it was a lot of work. i wish you the best of luck