Gas leaking from middle stern below drain plug

[pshea69]

Well, we replaced the rotted fuel line, then put 24 gallons in it and ran it with the ears. Ran great, no problem. Put it in the bay to run and fish a bit, after about 4 spots, turned the ignition and a small explosion elevated me and my buddy, Smoke came from the forward hatch, with life jackets melting we hit it with the fire extinquisher. After being a bit shocked, got towed back to the dock. Took to our buddy local boat mechanic. Pulled the drain plug and pure gasoline poured out in a 5 gallon bucket then mostly water. Obviously, very lucky. Guessing bad (old tank). 1982 V-20 fisherman with original Sea Horse 200. Hasn't been run much over the last two years with the previous owner. You can also call me a dumba......