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Leaky fiberglass tanks. Here we go again!!

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Old 07-22-2008, 08:31 PM
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Rob From Raybo In Lindenhurst LI Did A 28 Skater For Me And Did An Outstanding Job Redoing The Glass Tanks ,,
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Old 09-29-2008, 07:57 AM
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bringing this topic back to the top. I cut the top of my motion tanks off this weekend and am in the process of cleaning out the tanks. Now I am wondering what is the best product to use when sealing the tanks.

Thanks!
Don
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Old 09-29-2008, 08:30 AM
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Originally Posted by Maritime_Eng
bringing this topic back to the top. I cut the top of my motion tanks off this weekend and am in the process of cleaning out the tanks. Now I am wondering what is the best product to use when sealing the tanks.

Thanks!
Don
Results of BoatU.S. Sponsored Fuel and Fiberglass Gas Tank Tests

Soon after the Long Island Sound area of New York switched to gas mixed with ethanol, BoatU.S. began receiving calls from boaters who owned older gas-powered boats with fiberglass fuel tanks. The tanks, it seemed, were being slowly dissolved by ethanol; black stuff was building up on valves and intakes, destroying engines and some fuel tanks were becoming soft and even weeping fuel. Since then, BoatU.S. has sponsored several tests to find out exactly what the problem is. Here are the results of what we have learned so far. We’ve highlighted the important aspects in each case.

"The answer is aluminum"

http://www.boatus.com/seaworthy/fueltest.asp

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Old 09-29-2008, 08:55 AM
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Originally Posted by Maritime_Eng
bringing this topic back to the top. I cut the top of my motion tanks off this weekend and am in the process of cleaning out the tanks. Now I am wondering what is the best product to use when sealing the tanks.

Thanks!
Don
http://www.ceram-kote.com/ This is what we used in the tanks on our AMT. It was referred to me by other racers that used it with success as well. You need to besure that you get all the fuel out of any coring first or the gas fumes will create tiny pin holes in the Ceram kote while it drys. You just paint it on with a brush once prepped.
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Old 09-29-2008, 11:37 AM
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wahoo, thats the same stuff dw uses in his tanks. if there old tanks sand the tanks down into virgin glass and possible put down a layer of new glass before using the ceram kote
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Old 09-29-2008, 11:53 AM
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Yes it is. DW made the original AMTs. As I told Maritime, you need to be sure that all the gas is out of the coring. If not the fumes will leave tiny pin holes. I drilled out the bad spot and filled it will epoxy then I sanded the inside of the tanks and layed down a single layer of light mat. I then painted in the ceram kote with a brush the inside of the tanks. I think I put on 3 coats.

Also when I cut the top out of the tanks, I beveled it back about 2 inches all the way around to make a flange to bolt down a 3/16" aluminum inspection plate. That made it easier to recoat in the future.
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Old 09-29-2008, 12:48 PM
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This is great information guys! Thanks! The price of the product is fairly reasonable. I will be making an order to them later this week. I just need to measure the inside of my tanks to see how much of the product I need.
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Old 09-29-2008, 01:35 PM
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I've used thi several times with excellent results. Very easy to use.

http://www.caswellplating.com/aids/epoxygas.htm
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Old 09-29-2008, 07:19 PM
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Originally Posted by Maritime_Eng
This is great information guys! Thanks! The price of the product is fairly reasonable. I will be making an order to them later this week. I just need to measure the inside of my tanks to see how much of the product I need.
maritime, let me know if you need any help. i'm local, in bonita and have used to stuff on a few occasions.
lewis marine supply use to stock it. don't know if they still do, but there over on the east coast of fl
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