Cracked fiberglass fuel tank

LobsterMobster

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I have a 50 gallon fiberglass fuel tank under the deck in my boat that has a crack, i currently do not use it, because I have another 50 gallon on the other side. I was wondering if there was an easy fix or if its even possible to fix it after fuel has been in the tank. The crack is fairly low on the tank and the tank has a fill, feed, return, transfer, and vent. I didn't do it but i can only assume it happened due to rockhopping. I am not ready to rip up my deck, but it may eventually come to that...
 

MDI45

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L.M. If you can get to the tank ..you can try draining it and washing (SOAKING)the area with acetone and try to re fiber glass the crack
 
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BillD

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I have a 50 gallon fiberglass fuel tank under the deck in my boat that has a crack, i currently do not use it, because I have another 50 gallon on the other side. I was wondering if there was an easy fix or if its even possible to fix it after fuel has been in the tank. The crack is fairly low on the tank and the tank has a fill, feed, return, transfer, and vent. I didn't do it but i can only assume it happened due to rockhopping. I am not ready to rip up my deck, but it may eventually come to that...

A new term/word here....."rockhopping" ??

What is it ????
 

F/V First Team

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Engaging rocks that are higher than the depth of ones keel?

If you can access the crack, rub ivory soap into the crack, nice and hard. Prep the area, a little grinding should suffice, glass the area.

Easy peasy


That's Ivory soap
Ivory
Remember: Ivory

ivory-soap.jpg


This stuff

I can't stress how important it is to use Ivory
 

LobsterMobster

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Thanks, I do not think i will be tackling this issue anytime soon, but always good to know the best route for when I do!
 

Sailorgp

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I wouldn't use polyester resin for the tank repair...it has poor secondary bonding characteristics. Epoxy would be a better choice...although I'm not sure how compatible cured epoxy and diesel fuel are. Vinylester resin would be another possibility. You might want to search the web for possible solutions Could you repair the tank from the outside?
 

LobsterMobster

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No glassin' from outside, the tank is glassed right to the hull and no space to get at it under the deck, so its sounding like the only option is to cut it up and do a legitimate repair. Thanks.
 
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