I have purchased a 1984 Sportcraft 250 C-Eagle. It has a Mercury inboard drive. The boat had been shrink wrap stored for the past 5 years. I have had the boat gone over, and have only to find out about the gas tank. I believe that it is empty, and probably needs to be replaced. It is behind a plywood cover, and I have been unsure about the repair or replacement. Does anyone have any information on this topic?