Can the fuel tanks on a 1997 Sailfish be replaced via the deck access without having to do any cutting to remove the old and install the new tanks? On the top side of my tanks, I have no visual corrosion, but isn't the bottom side where corrosion first occurs? At 13 years old, am I living on borrowed time? Other than rinsing off the top side of the tanks, is there any other preventive maintenance I should do? Am I taking undue risk by waiting for the leak to first occur? I keep the boat on bunks in a marina yard, with the plug out, so there would not be a large accumulation of fuel in the bilge if a leak developed while it was sitting in the yard. Is there an explosion risk if a leak started while the boat was under power?