Seasport skipper 19 podding project

What do you guys think a new aluminum belly type fuel tank should cost Say 60 gallons.
37”L x 31”W, 11” deep at sides and 15.25” deep at center. This is the configuration of my current tank with an extra 7” in length.
 
Could try Adventure Marine. I haven't used them but got a budget estimate of $1300 each plus tax for a pair of these:


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I got 3 or 4 quotes on a belly tank last year, and these estimates are all in the range. $1500-$2000. That was not surprising to me but I never went ahead because the fibreglass work to make it fit was going to add another $3k plus.
 
My tank quote got readjusted down to $1700 plus tax. Apparently there was an error on the spreadsheet. I’m happy with that. Will be approx 60 gallons, up from the old one at 49 gallons. Will be .125 thickness. Old tank was .090. I believe they are going to build the tank starting tomorrow.
 
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Here are some pics from the fiberglass shop. Back deck stringers and transom will be new.

Lot of holes to fill.
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This is looking towards the cabin. Motor mounts are coming out.
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1st sheet of transom plywood. Will be 2nd one after this.
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id go as big as you can for the fuel tank. like Brando said, sheets are 48". dont have to fill it but you can if you need extra. also 1/8" is thin IMO. great looking project
 
I could use a little education here: why is wall thickness and issue for permanently installed aluminum fuel tanks? Easy to see that plate thickness matters for hulls, but if it's solidly mounted below deck and glassed in, is there really much point in 3/16" over 1/8"? Aren't the welds be the critical part? Molded poly tanks wouldnt even be 1/8" thick from what I've seen.

Not being critical here, just wondering.
 
I could use a little education here: why is wall thickness and issue for permanently installed aluminum fuel tanks? Easy to see that plate thickness matters for hulls, but if it's solidly mounted below deck and glassed in, is there really much point in 3/16" over 1/8"? Aren't the welds be the critical part? Molded poly tanks wouldnt even be 1/8" thick from what I've seen.

Not being critical here, just wondering.
thicker material takes longer for electrolysis to burn through.
 
thicker material takes longer for electrolysis to burn through.
That’s true but my original aluminum tank that I’m changing out is .090” thick and it is now 33 years old and still no leaks. The shop guy was amazed at how well it held up. Called .090 pop can material 😂
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My original aluminum tank started leaking a few years back. When I pulled it out I found pin holes in the bottom. I believe it may have been caused by bits of stainless downrigger wire from many years of cutting getting under the tank. Replaced with a poly tank. I guess the restriction with poly tanks is you can't get custom sizes.
 
Here are some pics from the fiberglass shop. Back deck stringers and transom will be new.

Lot of holes to fill.
View attachment 112977
This is looking towards the cabin. Motor mounts are coming out.

1st sheet of transom plywood. Will be 2nd one after this.
What are the little blocks of wood for in the back? Is that to hold the new plywood in place?
 
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