Have a 1997 Tournament with the 100 gallon main and 50 gallon aux fuel tanks. Have had gas smell and traces of fuel in bilge. Replaced the gaskets on both the fuel sender units(aux one was shot). Everything I can see from access ports looks clean and tanks appear to be clean from the top with zero corrosion(boat has 180 hours on it). Im going to check around the fuel filler cap areas first to see if one of the filler or vent lines has issues. The smell is worse after filling tank. After that pull the floor hatches up and inspect everything. I know the gradys have issues with the tanks but this boat has been babied its whole life. Any other ideas where to look? Where do people get replacement aluminum tanks from and do they sell poly tanks in the same sizes? Thanks for the help!