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I am working on my 1961 Whaler and want to weld up a gas tank to go above deck, (under the seat). I am new to this so here is my question:

Would the tank just need a fuel neck, a vent, and an outlet? I'm thinking of welding the outlet under the tank and drilling a hole so the outlet can enter the tunnel that runs to the back of the boat, that way gravity primes the line and it runs under the deck back to the Yamaha outboard.

Does this sound logical?

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It's not a good idea to have the outlet at the bottom of the tank. Best practice is to have it at the top with an internal standpipe to the bottom of the tank. This is much safer in the event a leak develops at the outlet fitting or hose.

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Thank you, that makes sense. I appreciate the advice!

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What material do you plan to use and what capacity will it have? Will the tank be portable?

I would use bends where possible to avoid seams.

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Typically the fuel bulb that is installed inline on the fuel supply hose makes and keeps the line primed.

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http://www.babylonboatworks.com/bbw-t...abrication

Here is a video of the fabrication of a tank for an Outrage. Of course the capacity and location of the tank are different, but the fabrication should be similar to yours.

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lgdpt,
To each their own, however what would seem most logical to me is not to spend a lot of time and or money constructing something that might leak or not be safe in the event of a mishap or collision when marine approved fuel tanks that will fit under the seat of a 13 foot sport go for $25-$75 depending on size. I would believe what you will spend on materials will exceed that and I know for sure that the aggravation quotient will. From the looks of the sport on your personal page, I think your time and money will be better spent on restoring other parts of the boat. After all, after reinventing the wheel in the form of a custom fuel tank, that is what you will have. Just another wheel.

Jim G.

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I agree with Jim this is not a 20ft or larger boat and therefore your removable carry on tanks would be good. I also agree that it might look great to have a custom tank under the seat but your pickup and fill are still on the top (sticking out.

Mike thank you for the great aluminum tank manufacturing clip.

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You are probably right. Im rethinking this. I have seen some nice aluminum tanks that would work well for me

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Was there something wrong with the post I made about having a custom made tank for my 15' center console?

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Duane,
You posted it on another discussion about a Whaler For Sale.
Wasn't sure where it was intended so it was deleted.

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I could've sworn I posted it here on this thread and then clicked back to make sure the photobucket link worked since they are now holding everyone's photos for ransom.

I'll try again.

The the original poster.
I had a tank made by a marine fuel tank fabricator for my 1983 15' Center Console. Custom to my specs to have it as big as possible and still fit under the seat. It held 28 gallons which was good for a season's use with a Honda 50 4 stroke.

Here is a link to the pb album with some pictures of the tank.

http://s96.photobucket.com/user/porth...amp;page=1

On one of the pictures you can see I took the top port for the fuel line and ran it down into the tunnel to keep it off the deck.

Fuel tanks should be USCG certified, I would suggest you not build your own tank.

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I like the look of a custom tank under the seat. In my Montauk (1989), I had 2 red metal tanks under the seat. My brother, who still owns the boat, just had it re-powered and had a new single plastic tank installed. I think it looks terrible.

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Mirax still makes metal fuel tanks for under the RPS. They are Whaler quality.

They can do twin 12 gallon or single 24.

Most owners paint theirs in red.

http://www.miraxfuelproducts.com/new_...te_003.htm

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Thank you, I agree. I am going to buy a tank. Not worth the time or (potential) trouble to make one.