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Old 11-01-2009, 09:54 AM   #21
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12' Aluminum with twin 3's
The additional weight in the front of the boat probably helped offset that boats sternweight which was causing it to porpoise.
Adding tanks to the very front is one way to resolve that issue although I'm not convinced thats the right way.
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Old 11-01-2009, 10:34 AM   #22
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1984 30' Scarab S-type with twin 502's ------ 1974 21' Tahiti Jet with a 502
Couple things.......

Fuel tanks in a different location will probably affect the CG of the boat and change it's handling characteristics. Replacing the sand bags with fuel will provide similiar function but the fuel will weigh 247lbs and as the fuel burns the boat may handle differently. If at all possible I would place them in the factory location. What if you reinforced the holes with several extra layers of fiberglass mat and resin. Then have extra sturdy tanks built and foam them in. I would then build new floor sections with some cross bracing built into the floor sections and the glass those into place! IMO you would be fine!

I guess my 2 cents worth!

Good luck
Jim
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Old 11-01-2009, 02:14 PM   #23
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the bad thing is the old tank is at an angle and the space probably wouldnt hold but around 12 gallons in the middle section. look at the pics and there is a "stringer" that goes from the back to the front thats about 4" tall.(see pics)
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Old 11-01-2009, 08:30 PM   #24
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Originally Posted by justincasey57 View Post
the bad thing is the old tank is at an angle and the space probably wouldnt hold but around 12 gallons in the middle section. look at the pics and there is a "stringer" that goes from the back to the front thats about 4" tall.(see pics)
I think you may be surprised how much fuel it could hold. Give me the following dimensions and I will calculate the gallons

Height from the hull to the floor on the outside stringer (shallow side)
Height from the hull to the floor on the inside stringer (deep side)
Width from outside to inside stringer
Length of hole
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