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  plastic or metal???

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Author Topic:   plastic or metal???
thunderbay posted 09-21-2001 01:12 AM ET (US)   Profile for thunderbay   Send Email to thunderbay  
I have the original style steel gas tank. Saw a nice 6gal plastic one today. Should I switch and save a few pounds? Any problems with friction or what not, static electricity, if it slides on the floor?
AZdave posted 09-21-2001 02:08 AM ET (US)     Profile for AZdave  Send Email to AZdave     
Plastic does not rust or corrode, which should be a good thing for your fuel filters. If left in the sun with the sealing screw tightened down, all the plastic tanks I have used swelled a bit. Some of the cheap ones swell to look like sausages due to the internal vapor pressure of the fuel. This should be less of a problem in Florida as opposed to Arizona. It's not the humidity, but the temperature that causes internal pressure. From what I have read, static electricity is more of a problem here in the land of no humidity than it would be with more water vapor to allow static to dissipate. I always set the tank on the ground while filling at the gas station. I have not heard that static is a problem while using the tank in the boat. Plastic is very slippery when compared to the rubber strip around the bottom of a metal tank. This might be a problem in rough water. Dave
Samars posted 09-21-2001 07:20 AM ET (US)     Profile for Samars  Send Email to Samars     

Thunderbay...I know you have a classic 13...I as well was questioning metal or plastic gas tanks...I have two original 6 gal gas tanks for my 1967, 13. Finding out that a replacment metal tank was around 80 dollars and then seeing platics much less...I figured that the metal were a better tank. In addition the look of a metal tank in a classic bost is a better fit and simply looks sharper(my opinion). I sanded and restored the "guts" of my two tanks and now you can't tell them from new. Weight does not seem to be a problem, nor does the swelling that others have spoke of.
JFM posted 09-21-2001 08:47 AM ET (US)     Profile for JFM  Send Email to JFM     
I have a Pate 12 gal. tank that fits perfectly under the helm seat of my 13' sport. To secure the tank I made 4 teak corner pieces and scewed them to the deck anchored with 5200. The tank sticks out about 4" from the rear of the seat for easy fill-up. Regards, Jay
bdb posted 09-21-2001 12:02 PM ET (US)     Profile for bdb  Send Email to bdb     
I would stay with metal. I've tried 3 different brands of plastic 6 gal. tanks and they've all been lousy. Any amount of temperature rise will cause them to swell, and they leak through every fitting. Some folks say the secret is to not fill them completely. Perhaps...then you've got 4 gal. tanks.
lhg posted 09-21-2001 01:02 PM ET (US)     Profile for lhg    
I've always thought the long, low Tempo tanks were perfect for the Classic boats. They fit under the thwart seat, and come in 12, 15 & 18 gallon capacities, height being the variable. If the cap vent is left open, they should not swell or leak. They were specifically designed for Boston Whalers.

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