Condition of tank suggestions -
Any fumes present?
Fuel tank sender gasket can leak and screws loosen.
Foam can trap water and gas. Any odors when you pop open the pie plates.
Any sign of gas or sheen in bilge?
Inspect all fuel tank hoses, fittings, vents, connections, external fuel filters, etc
Any odors or leaks when gas tank is completely full after boat ride?
Using Racor fuel and water filter with clear bowl will help show water in gas tank.
Pull the fuel sender and inspect tank very carefully with a sealed flashlight for bad spots or hired a pro with better equipment to scope the tank.
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