poly vs aluminum gas tanks

[Dilligaf]

heard newer boats are goin with poly since ethanol is causeing issues in aluminum tanks. what you guys think if you were going to replace your 30+ year old tanks now?

[FELLOW-SHIP]

I would replace it with another aluminum tank coat it and install it with out foam and if I am still ALIVE 30 YEARS from now and still fishing this boat I would replace it again if it needed it.

..................
FellowShip

Just for the Grins

Official Antique Classic SeaCraft Owner

[Islandtrader]

another aluminum tank coat it

I know this will open a whole bunch of discussion. However if the tank is not sitting in a foam coffin and gets plenty of air circulation and is on runners, why coat it? When I got my tank made from Sunrise Tanks, he said if the above is met he does not recommend coating.

Lets Hear It

[fishing_fanatic]

Curious, why is poly better for E10 than Alum?

[bigeasy1]

Another vote for Aluminum.
It isn't the aluminum that ethanol is causing problems with.It's the build up of crud that was in the tanks when ethanol became prevalent.
The Ethanol, being a stronger solvent than Gasoline,dislodged the years of accumulated build up in the fuel tanks,most which happened to be made of aluminum.
All that crud ended up in your filter,or worse,your carburetor.

If you went new,it wouldn't matter if you went with aluminum or polyethylene.Neither material is supposedly affected by ethanol,although if one turns out to be,I'd bet my last dollar that it will be the poly.

[bitsamonkey]

I would love to get a poly tank for my boat. I've had aluminum tanks in my other boats and they all had to be replaced. It's tough to properly mount aluminum tanks in the bilge of a small boat, as there just isn't enough room to strap them in and allow for air flow. It's also hard to control weld quality and materials coming out of a bunch of small fabrication shops. If anybody's done the research on where to get an appropriately sized poly tank for a 20' please pass on the info and I'll gladly be a guinea pig. I mean, when was the last time your poly jerry can or small outboard tank went bad?

[Islandtrader]

I would love to get a poly tank for my boat.

Check this place out. They have a large supply of stock tanks.

Fuel tanks

[3rdday]

I put two poly tanks in my boat.
Poly is resistant to almost all fuels,chemicals, solvents
Poly will not corode- alluminum can and probably will- the answer is; you never know, so don't take the chance. Are you a gamblin' man?
The challenge will be finding a poly/s that fits perfectly.
For me the decision was easy, as I did not design in easy tank removal.
Good luck

[Dilligaf]

from what i understand ethanol holds water pretty good and water makes condensation in fuel tanks, which creates corrosion. just was reading thru the hull truth and wanted to see what you boys think. i guess some new boats are comeing with the poly tanks.

[3rdday]

Aluminum will further exascerbate the problem with temperature fluctuations, aluminum is more thermally conductive than Poly . I believe the Alum. tank will tend to"sweat" more on the inside