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  #1  
Old 09-18-2010
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Stainless fuel tank

Anyone have a ballpark idea of what it costs to have a 100gal diesel tank made for a Tayana 37. My boat has the tank below the floor midship.

Thanks

Gary
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Old 09-19-2010
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I bet you're over $1000. luthers welding bristol, RI will give you an estimate if you fill out the online request form. Marine Tanks, Fuel, Water, Storage Tanks, Luthers Welding

Have you considered plastic? Inca Molded Products | Custom Rotational Plastic Molding
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Old 09-19-2010
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We found a pre-fab stainless tank and then had it slightly modified to fit. It was cheaper than going with a purely custom fit. Don't recall the cost right now, but it was not a lot more than pre-fab plastic.
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Old 09-19-2010
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The normal 'bilge' tank found in Ty37s is usually aluminum, easily removed and easily 'rebuilt' for little cost.
The aluminum 'water' tank can easily have a new bottom applied, have large access (studded) flanges added, .... to which you can easily apply a 'lining epoxy' and fiberglass cloth (building a FRG tank inside the OEM tank). Significantly cheaper than a new tank .... and the FRG lining makes the aluminum compatible with diesel fuel ... or with chlorinated water.
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Old 09-19-2010
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Thanks RichH. I appreciate that good info. Mine is aluminum and your right, they are obviously very easily removed. I think I'll try that route. Yank it and fix it. Have an inspection port put in as well. Many thanks

Gary
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Old 09-19-2010
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Good decision. I would have advised going with plastic if you were going to replace it. Stainless Steel is not a good option unless you can guarantee that it will stay dry all the time and have air circulating on all sides, top and bottom. SS is very prone to crevice corrosion. But repairing your aluminum tank is a good option. It should last a long time.
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Old 09-19-2010
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Plastic - NOsiree. They cant put baffles in a large rotomolded poly tank. The impact inside a 100 gallon 'plastic' tank without baffles will be tremendous. Forget a 'plastic' tank of that size .... unless you dont mind the ends becoming ruptured, etc.
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Old 09-21-2010
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I know of one boat builder that uses polyethylene 100+ gal tanks with baffles for fuel. So it can be done. The marketing blurb:

"The tanks are fitted with baffles and inspection covers. We have fitted these because we believe them to be far superior to stainless steel or aluminium tanks, as they minimise condensation and are much less likely to suffer from stress cracks."
Don't how much of that is true.

-- Mike
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Old 09-21-2010
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Originally Posted by mboninco View Post
I know of one boat builder that uses polyethylene 100+ gal tanks with baffles for fuel. So it can be done. The marketing blurb:

"The tanks are fitted with baffles and inspection covers. We have fitted these because we believe them to be far superior to stainless steel or aluminium tanks, as they minimise condensation and are much less likely to suffer from stress cracks."
Don't how much of that is true.

-- Mike

Biggest problem I have come across with rotomolded tanks is odor permeation. Once the diesel smell has permeated it, the tank it is toast..
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Old 09-21-2010
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Tank should be aluminum or black iron not stainless.
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