Replacing my fuel tank this Spring, and need your sage advice.

[Rockter]

Someone advised cutting a big hole in the hull to get the tank out?

A joke in the pub', when everyone is drunk?

Insanity.

[Rockter]

It is EXTREMELY difficult to rid a tank of gasoline, even if you flood it with water in the hope of it floating to the top. It will not rid the tank of all of it. I really don't have an answer and it will just kill you if the conditions are right for combustion. Perhaps you can flood it with CO2, maybe by dropping big lumps of dry ice in there, and plenty of it? Is CO2 denser than gasoline vapour? I know not. It would need to be for that idea to work.
Pls be careful, in Egypt a while back, three men were killed instantly welding an oil rig mud pit with diesel fumes in there. Yes, my friend diesel can turn nasty too, it seems.

[Capnblu]

Look up KBS coatings. I have used their system before, and am in the process of repairing my own fuel tanks now. As for the removal of your tank, drain it out as best you can, and lift it out, they are not that heavy, or that big. I picked up an in-line fuel pump at the wrecker, and used it with a long hose into a 55 gal. barrel. Both my tanks filled 2 barrels.