'72 Super Fish 20' Rebuild

[Thepistonhead]

Looks awesome. What coosa are you using on the deck?

[JBASS02]

I used 1/2" 26lbs. Over the fuel tank where the span is the largest there is a second layer on the underside. If I did it again I would do everything except the transom in Divinycell, would have been cheaper. When I was planning out the project I didn't want to mess with doing Coosa inserts where I would be bolting components so I did everything in coosa.

[Thepistonhead]

Originally Posted by JBASS02

I used 1/2" 26lbs. Over the fuel tank where the span is the largest there is a second layer on the underside. If I did it again I would do everything except the transom in Divinycell, would have been cheaper. When I was planning out the project I didn't want to mess with doing Coosa inserts where I would be bolting components so I did everything in coosa.

I'm planning on the same coosa but in 3/4 for the deck. I've been told by a couple of builders that the 1/2" flexes a bit on the deck. Are you seeing this at all? Impressive build for sure!

[Yardguy]

Originally Posted by JBASS02

I used 1/2" 26lbs. Over the fuel tank where the span is the largest there is a second layer on the underside. If I did it again I would do everything except the transom in Divinycell, would have been cheaper. When I was planning out the project I didn't want to mess with doing Coosa inserts where I would be bolting components so I did everything in coosa.

I was planning on using 14lb airex on my deck.... .Now im second guessing myself.
What weight divinycell would you have gone with?

[JBASS02]

Originally Posted by Thepistonhead

I'm planning on the same coosa but in 3/4 for the deck. I've been told by a couple of builders that the 1/2" flexes a bit on the deck. Are you seeing this at all? Impressive build for sure!

I was worried about flexing so I ran strips on the under side down the center where the span was ~24" so in those areas it is 1" thick. I haven't glass the top side yet and already there is no flex.

[JBASS02]

Originally Posted by Yardguy

I was planning on using 14lb airex on my deck.... .Now im second guessing myself.
What weight divinycell would you have gone with?

I'll be the first to say I only know what I've read on forums, this is my first time doing all of this so take what as say for what it's worth.

Reasons I would do it differently.

Divinycell is significantly cheaper than Coosa.

Since doing the Coosa I've read about using the allen key to remove foam and fill with thickened epoxy for areas that will be bolted.

I would have used 5lbs divinycell which would have saved some weight over the 26lbs of Coosa. (total deck coring weight ~Coosa 68lbs;Divinycell 13lbs)

Divinycell is easier to work with, cut it with a box cutter, light and easy to handle solo.

[Thepistonhead]

Originally Posted by JBASS02

I was worried about flexing so I ran strips on the under side down the center where the span was ~24" so in those areas it is 1" thick. I haven't glass the top side yet and already there is no flex.

Good to know! Thank you!

[JBASS02]

First side of the cap is glassed. Hopefully will get the front and other side Friday evening.

[uncleboo]

How much did you add to the width of the gunwale cap at the stern? I'm going to do the same thing to my new 20.

[JBASS02]

I'd have to measure but it's around 8-9" wide. I split the cap 8' from the transom and it's the same width from that point to transom.