Don't run out of gas, rowing is no fun.
I have 3 outboard fuel tanks currently with Johnson / Evenrude fittings ( can be changed or hoses adapted for other makes ) .
They are 25 liter size and NO RUST inside. They have been well looked after.
Buy 1 @ $30 , and if you want more than that get the second for 27 and third for 25 .