Aluminum Marine Fuel Cell
A forty-gallon aluminum tank that lives under a deck, with its sender and fill hose: about 46 lb empty. One person can carry it, two-handed and slowly. Install it at a boat yard (restoration). The yard's hoist lifts it in from your parts bay or your boat. Trade or crafting item.
Crafting
Tools (not used up)
Where to find it
Found in
Scrap heap
What it is for
Salvage
Taking it apart at a recycler gives: It takes 10.9 seconds. You need 
Toolkit to do it.