1978 Proline Flatback Rebuild

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FloridaSean

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Mar 26, 2014
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37
Re: 1978 Proline Flatback Rebuild

Work has been crazy, so have not had much time to spend on the boat. However, I did get all of the transom removed down to the skin and will be installing and glassing it in this weekend! Will be setting it in with PB and then will glass it in with two layers of CSM over fillets (8" and 12" pieces) and then two layers of 1708 over the entire transom? Will this be sufficient? Also, what is the best/proper way to prep everything after grinding?
 
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FloridaSean

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Mar 26, 2014
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37
Re: 1978 Proline Flatback Rebuild

Got everything sanded down and ready for transom install!
 
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FloridaSean

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Mar 26, 2014
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Re: 1978 Proline Flatback Rebuild

Got the transom piece cut to fit and filled holes with a pre-mixed putty. Used two 3/4 inch sheets of Aruaco glued together. Finally layed my first layer of CSM on one side of transom piece....going to lay other side....just wanted to post a quick update. Also, sanded leaning post and had my buddy Kevin LineX it for me the other day! Planning on using LineX on the center console and deck, as well. Will post a pic of leaning post later!
 
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FloridaSean

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Mar 26, 2014
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Re: 1978 Proline Flatback Rebuild


Close up shot to see texture.
 
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FloridaSean

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Mar 26, 2014
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Re: 1978 Proline Flatback Rebuild

First pic of leaning post isn't in direct sunlight and last two pics are in direct sun. The color is sort of a pale/pastel peachy orange or salmon.....kind of hard to explain. Would appreciate opinions on color selection. I personally like it but the wife hates it! She wanted a light/ pastel blue or sea foam green. I wanted to do something different than every other boat you see on the water....but maybe it is ugly...I am a little color blind I have been told! Lol
 
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FloridaSean

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Re: 1978 Proline Flatback Rebuild

Used landscape timbers with through bolts to clamp everything down. Put wax paper on portion of threads that would get putty on them to make removal easier after everything dried.
 
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shaw520

shaw520

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Aug 27, 2009
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634
Re: 1978 Proline Flatback Rebuild

Thread #23 - Looks like there is still some old wood in those stringer channels,.. were you planning on cutting off those caps and removing that so you can replace w new ply? If the CSM to hull is still good you can sometimes leave the bottom couple inches, then place new ply stringers within the channel.
 
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FloridaSean

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Mar 26, 2014
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37
Re: 1978 Proline Flatback Rebuild

Funny that you mention that because that was what I was thinking about doing but didn't know if that would work. I figured it would help hold everything in when I set new stringers in putty. How well does the inside need to be ground down for putty to stick? And what is all this talk about hard spots that I keep reading about? Nobody really explains....just say that its not good/hull failure?
 
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FloridaSean

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Mar 26, 2014
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Re: 1978 Proline Flatback Rebuild

Trying to post rest of transom installation pics but it keeps posting same pic over and over....will try posting them later.
 
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laxray

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Jul 11, 2009
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Re: 1978 Proline Flatback Rebuild

My understanding on hard spots is you really don't want the plywood to actually touch the hull. It should float above the hull (on foam) , then the fiberglass will connect the plywood and the hull together. Since the plywood is actually floating the fiberglass forms the connection between the plywood and the hull. This connection forms flexible support for the hull. While wrapping my mind around this I realized that the fillets on each side of the plywood are just there to make a smooth transition for the glass and to prevent all the resin from running out.
As for putting the plywood into the pre existing fiberglass I was going to do this but realized the new plywood was thicker than the old and ended up grinding mine down to about 1/8th of an inch. I was worried if I tried to force it the wood may act like a wedge and crack something on the outside.
 
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