Water in fuel tank.

[pjayswell]

I am new to this site, invited by a deep purple fan. Anyway , I inherited a 1989 v20 with water in the gas tank. My question is what is the best method to completely empty the tank, and how can I tell if the tank is still good. It has 30 gallons of fuel + the water.
This is my 2nd v20, and I got a lot of good service in the Gulf of Mexico & Breton Sound with the 1st one (a 1982).
Thanks for your help.
pjayswell.