Ha Mike
There should not be any problem with corrosion from the inside of the tank. Gas and aluminum have been quite friendly for a very long time. The only problems would be decaying rubber from the sending unit, water in the tank, and debris from filling the tank. If you change out the gas water separator that should do it for you. I always pore the contents of the old gas water separator in a glass jar just to see what is in there.
FellowShip
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Just for the Grins
