My Belly Tank

[ftltony]

Today, I finally pulled the belly tank from my boat. On the tank, there is writing in a sharpie with the numbers;

42
31
11

So I am thinking (and I measured it as well)

42 inches
31 inches
11 inches

Figuring this as the size, and figuring things out, I am THINKING the math equation below is how many gallons of fuel my tank is.... Is my 7.418 factoring number correct for figuring out how many gallons the tank is?

(42 divided by 12 = 3.5) ~ 3.5
(31 dividied bt 12 = 2.583) ~ 2.58
(11 divided by 12 = .916) ~ .92

3.5 * 2.58 * .92 / = 8.3076 * 7.418 = 61.6257768 (62 gallons)

By the way, I have been to Tempo, Moeler and other sites and cannot find the exact size of the tank in my boat or any real large tanks for that matter ... In addition, I have approximately 12 to 14 inches of additional space forward of the existing fuel tank in the floor that is just dead space and I was also looking to get a larger tank so I can have more fuel for offshore trips ..... any help..???

 

[jevery]

Re: My Belly Tank

7.4805 according to
http://www.rampump.com/handbook/cfactors.html

Not that it makes any appreciable difference.
Probably need to factor 5-7% loss for wall thickness, air space, etc. to obtain "working" capacity.

 

[ftltony]

Re: My Belly Tank

Thank you and thats quite an awesome web page by the way!

And by the way, those are the "interior" dimensions of the tank as there is also the numbers on the OTHER side of the tank that read;

42 1/4
31
12 7/8

.... which I have measured as the exterior sizes.

So using that figure in my equation, I get 62.1450 gallons...

 

[fdmsiv]

Re: My Belly Tank

Was this a plastic or metal tank? I only ask because if there was writing with a sharpie I would assume it is probably a custom tank. Check the boating sites, iboats, hamilton marine, etc and see what they have.