Gas Tank Problem, Advice Needed

[wncrjb]

Hello,
In my 1988 bowrider, I have a 23 gallon aluminum gas tank mounted above deck,next to the engine on port side.

I took it out when I replaced the floor and carpet and figured I'd flush it out before I put it back in. ( the boat has sat for over 10 years )

After a good cleaning, I filled it up half way with water, sealed the ends and pressurized it with a few pounds of air ( 2-3 PSI ).

I now have about 10-12 spots on the BOTTOM of the tank that's seeping water. Nothing that has even made a droplet yet. The tank actually looks like it's quite good shape too so this surprised me.

With NO pressure, it won't seep.

What I'm in need of now is options......

I know there many good sealers out there but in a boat application, I'm a little concerned that it might not last for the long haul.

With the shape of my tank, A new one would have to be CUSTOM made to fit.

Could I have a welding shop cut out my tank bottom and weld in a new one?

I am going to sell the boat but I do want it 100% right before I do. I want a lasting fix, not just something to cover up the leaks for the short ride.

What do you guys suggest?

Thanks in advance,
wncrjb

 

[Windykid]

Re: Gas Tank Problem, Advice Needed

I would have a welding shop put a new bottom on and pressure test before instalation. Also use a grease pencil and mark where it is leaking so the shop can see.

 

[tashasdaddy]

Re: Gas Tank Problem, Advice Needed

google marine fuel tanks, there are a lot out there, replace it with a new poly tank.

 

[wncrjb]

Re: Gas Tank Problem, Advice Needed

Thanks for the replies....

While going to town this afternoon, I stopped by a local welding & fabrication shop that is very reputable.......
They said they can cut out and replace the bottom for about $130.00.
I know they do quality work but I can get a new one that almost fits the hole for a little more than that..... decisions .......decisions......

 

[Chris1956]

Re: Gas Tank Problem, Advice Needed

Spend the extra to get a new poly tank. The aluminum tank will eventually leak from somewhere else. Actually I am surprized it leaked. I had one in my '88 bowrider, under the floor and I kep the boat in salt water, and it never leaked. I would have thought that yours would have had better care being above the floor.

 

[sdunt]

Re: Gas Tank Problem, Advice Needed

There are LOTS of gas tank sealers on the market, even POR - 15, whom I trust because I used their products on my Car and the boat. http://www.por15.com/bSPECIAL-Quart-of-Fuel-Tank-Sealer-Quart-of-Metal-Ready-b?sc=2&category=180

But I don't get great feelings about how these products work with Ethanol in the gas. So far i have not had a need to use these, I just keep using Poly tanks instead.