Someone had to drain this fuel tank once before. They put an oil drain plug in the hole to seal it. It didn't seal so they used what I can only guess was silicone caulk to try to hold in the fuel.

Emergency Spare Plug. Garboard drain plugs are small and easy to misplace, so have a spare or two is good idea. The Emergency Garboard Drain Plug from SeaSense is designed for just this reason. The ...

This is a drain plug. When removed from the bottom of your boat's transom, water drains out. When inserted in the transom, it prevents water from coming back in. Sounds pretty simple, and maybe ...