It is interesting that the corrosion was under the foam. In my 1989 23WA, it occurred at the rear of the tank and nothing was even touching the tank and I was getting a gas odor but didn't discover the problem until I had lifted up my hand and it smelled like gas. The gas had saturated the foam near the rear of the tank. I had them re foam the new tank in place, if it lasts 20 years like the old one I will be 87 years old and probably not boating even if I should be lucky enough to live that long.
