[RobHoman]

Before you go to any other trouble, stop by an autoparts house and get some gas -drier. It is a liquid that you pour into the tank that absorbs the water and it goes through the engine as part of the fuel or is just "dried up". I''ve used this before and it works.

It will keep you from having to pull your tank and empty it out. Beyond the above, you would need someway to ccess the tank to mop the water out. BUT, it has to be done without any spark or static electricity producing components. An empty gas tank full of fumes is little more than a "bomb", and you can never get all of the fumes out.

Good Luck, and "Be very careful".