Aluminum fuel tank on deck

Can I temporarily place a 53 gallon aluminum belly tank on my deck for a reserve fuel supply?

I would need to modify the fill with clamps and a 90. Then make some kind of vent extension. And, of course, secure it from movement.

The supply appears to have an ASV, so I would need to add a selector valve and probably primer bulbs or at least one downstream from the selector.

and, of course ground the tank

a lightening strike could be bad, but not sure a strike is any less worse for a pillow bladder

If boarded by the CG, are they going to say it is unlawful?

-the tank was f/w boat and looks mint other than dust and some overspray

 

Why would it be unlawful, as far as I know there isn't a prescribed position or enclosure for a fuel tank.
A coat of rattle can white to keep down on the heat, a big Al wire hanging down into the water for grounding.
I would fit a filler cap with an automatic vent valve and plug the existing vent shut.

 

The regulations require a separate vent pipe. There are combination vent/fill deck fittings. There is also a minimum height above deck for the termination.
Google Maps https://www.google.com/maps/@34.9954308,-114.2038144,4z/data=!3m1!4b1!4m2!6m1!1s183B2i0Dhu5jI8UXzWNgG-Jq-VceZUo8?entry=ttu&g_ep=EgoyMDI1MDQwOS4wIKXMDSoASAFQAw%3D%3D

 

I can also run a copper wire into my main ground system. Any advantage one to another?

 

you shared a map..where are we going

 

The only problem that I see is that there is not a vent on the top of the tank on the other end of the fill. I am assuming that I see a vent behind the draw line, If for some reason the tank is full, and the fill/vent is covered by fuel, ie this end down, the vapor pressure could easily push the fuel back through the vent or filler. With the tank in the bilge, there maybe a couple of feet of to mitigate this issue.
Any of the long tanks that we built had a vent by the fill and a vent on the other end. Tee'd together so if the vent/fill points were covered, the vapor pressure of the fuel would transfer the fuel basically back into the other end of the tank. Of course that was before the days of the newer guidelines.

 

Maybe I will tip the fill end up a bit?

 

None, but I still would not put aluminium in contact with copper. In theory with everything nice and dry it will work, but why risk creating a battery.

 

That would help, but with the draw from the front and the front up, you would not
ever get all the fuel out of the tank.

 

You brought up a good point on copper and brass fittings. Use stainless fittings if you need to.

 

I couldn't build the deck mount and hook-ups for the price of a couple 15 gallon plastic marine gas tanks. If 30 - 45 gallons is what you need, just buy them and strap them down. Far less intrusive.

Fill-Rite makes a 12 volt transfer pump. https://www.zoro.com/fill-rite-fuel...OT2NwKw4kj_WInC9qA8aAkVsEALw_wcB&gclsrc=aw.ds