RE: Leaky Fiberglass Fuel Tank
Locating the leak is*key. it may not be the tank but the vent, fill or return line connecntions to the tank. Eliminate these easier areas first.* FRP tanks 30 years old sound kinda risky though. Lots of ways to install new, it all despends on access. Sometimes the cheapest way is to go through the side of the boat!! Tough choices no matter what.