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Post Posted: Mon Feb 13, 2017 8:05 pm 
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Well i did some more work on the boat this weekend. I got all of the old transom out finally! I did some grinding, but still have more to do. Hopefully it will be nice tomorrow so i can get it out of my garage and grind some more. I also want to start to fix the bad spots that i mentioned earlier on this post. Hopefully i can start to lay up some new glass on the transom skin this week and then test fit my coosa board! I need some advice on the layup of new glass on the transom skin? And layup for the lamination of the coosa? I have some 1708 and epoxy resin.
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I got my template cut out for the transom
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Post Posted: Mon Feb 13, 2017 9:45 pm 
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you did a good job cleaning up that transom. looks like your figuring it out as you go. as far as layup schedule i like the long piece last and then an extra piece right in the corners. but thats all personal preference

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Post Posted: Mon Feb 13, 2017 10:01 pm 
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Thanks ceejkay. Thats what i was going todo. smaller pieces to build it up and then the final piece to cover it all up. I am going to use epoxy. I have a question. When i do the lower corner piece. Should i tab it out the the bottom and side of the hull?

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Post Posted: Tue Feb 14, 2017 4:59 pm 
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It looks great. I however don't agree with the short one first theory. Remember each has their own way, but here is mine and my theory on it.

When you put the short one one first and build from there, when you go to sand, you sand through the large piece first compromising the strands of glass and have shorter contact patches on the hull. Yes, I understand that if you do it wet on wet, you get a chemical bond on all the pieces and the mechanical as well.

However, when you go to sand the top layer of the large piece, you will separate the glass strands losing the mechanical bonding and leave just the chemical attachment on the top layer. When I glass, I like the first layer of glass to be the large piece. This way you have the most contact on the first piece. You layer on top of that going shorter and shorter. This will help with fairing and having less build up at the ends as well. Should you need to sand/fair, you are going through the short piece first before the larger ones.

Also when you attach the large piece first, you have fresh glass to attach the remaining ones on for better bonding.

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Post Posted: Tue Feb 14, 2017 5:04 pm 
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For doing your transom in Coosa, you do not need to cover it in glass prior to installing as it is composite not wood. All you have to do is mix up some peanut butter, spread it on the contact surfaces of your core and place your core together. Let it kick. Once done, make up more peanut butter and spread on the transom skin and core. Place core in boat and press to skin. Put lots of pressure on it to get a good bond. Once in and settled, mix more peanut butter and fill all around core making good fillets.

When the fillets get a little firm, wet out your glass and go to town. While your at it, you can always make your outer wings of your transom a little taller to help with splash over for when you come off plane and not have to worry about a bracket.

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Post Posted: Tue Feb 14, 2017 5:08 pm 
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I just looked at your photos again. You need to bevel out the corner and fill it in. Looks like 2-3 pieces are gonna be needed. When you are there, do the scupper holes as well. Fill them in so when/if you decide to relocate them you have it filled and will be much easier to fair on the outside as well.

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Post Posted: Tue Feb 14, 2017 5:26 pm 
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Aquasport Commodore wrote:
For doing your transom in Coosa, you do not need to cover it in glass prior to installing as it is composite not wood. All you have to do is mix up some peanut butter, spread it on the contact surfaces of your core and place your core together. Let it kick. Once done, make up more peanut butter and spread on the transom skin and core. Place core in boat and press to skin. Put lots of pressure on it to get a good bond. Once in and settled, mix more peanut butter and fill all around core making good fillets.

When the fillets get a little firm, wet out your glass and go to town. While your at it, you can always make your outer wings of your transom a little taller to help with splash over for when you come off plane and not have to worry about a bracket.


This answers alot of questions i had on Coosa. I wasn't sure if i needed to put any layers of glass between them. So this clarifies it for me. Now do i have to drill any holes in the top piece to let air escape when i press them together? Yes i am planning to make my outerwings a little taller to help with the splash.

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Post Posted: Tue Feb 14, 2017 5:44 pm 
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Aquasport Commodore wrote:
I just looked at your photos again. You need to bevel out the corner and fill it in. Looks like 2-3 pieces are gonna be needed. When you are there, do the scupper holes as well. Fill them in so when/if you decide to relocate them you have it filled and will be much easier to fair on the outside as well.



Can you break this down for me a little more. This is my first time working with glass. s for th holes are you saying i should tape them up on the outside and then fill in the holes with glass?

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Post Posted: Tue Feb 14, 2017 8:02 pm 
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You need to taper that chunk out to make it a smooth transition. Go a little wider as it won't hurt. Should take 2 pieces to fill it back to level with the area. So when you put in the new glass on the inside prior to putting in your core, you won't have any pockets of glass. As for your scupper holes, grind the inside back a few inches to help with the transition. Put a small layer of glass. You can use packing tape on the outside to keep the epoxy from sticking/running out the hole. Once done, glass away.

May I make a recommendation? Put up a piece of melamine board waxed against your transom skin prior to glass. This will give you a nice flat solid brace to glass against. Clip the glass at the top so it says in place when you wet/roll it out.

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1971 22-2 Flatback (Rebuild status)
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Post Posted: Tue Feb 14, 2017 9:40 pm 
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I have a piece of melamine in my garage. What kind of wax should I use?

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Post Posted: Wed Feb 15, 2017 11:42 am 
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Plain carnauba will work (no cleaners) if you do not have release wax.

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Post Posted: Wed Feb 15, 2017 12:27 pm 
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Ok. Thanks for the guidance!!!

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Post Posted: Wed Feb 15, 2017 8:13 pm 
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Well i picked this up today. For the next few steps!
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This is what that corner looked liked before glassing. I did do some more grinding to clean it up better and get the rest of the loose glass out of there after this picture. Hard to take pics with gloves on!
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This is what it looks like as of now. So let me have it...good or bad!!!! i will do some more glassing tomorrow on the other spots of the transom and i will be laying a piece on the side of the hull as well before putting in the coosa board.
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Post Posted: Wed Feb 15, 2017 8:23 pm 
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i think what kevin was saying was to wet out the glass out side the boat and then transfer that over to the boat. i feel you might have some issues up top where its dry. also the idea of the more resin the better isnt always a good thing. resin on its own isnt very strong and a little brittle. but your using epoxy so its a little more forgiving than other resin systems. not so bad for a first time though

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Post Posted: Wed Feb 15, 2017 8:29 pm 
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Ok, i will go a little lighter on the epoxy resin next time. But thanks for the constructive criticism!!! Hopefully i wont have problems up top where it is dry! I did this at around 2 pm. I will go and check on it here shortly after dinner.

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