I was pouring ammonia into this gas tank to clean it out and the ammonia began leaking out of the rear bottom seam of the tank. it’s leaking about 2 1/2 -3 inches along the seam in both directions from the rear most point of the tank. the dried gas/crud was covering the entire bottom (inside) of the tank to the point I thought maybe it was an old dried up sealer. it was thick, 1/16 -1/8 inch or so. broke some of it up physically and shook lots of it out.

it’s the tank from a 1947 firestone single 3.5 hp. it’s shaped a lot like a Johnson TD-20 tank.

here’s the question. can it be sealed from the outside along the seam? I’d say it’s worth a try at least. if so, what would be appropriate? a 2 part epoxy? gotta find something that’s fuel proof obviously. any suggestions?

another approach would be from the inside. it might be tough to get an epoxy into the affected area. anybody else done it with success?

lastly, I could simply post an ad for another tank. the motor was given to my sons by another member at tomahawk last summer (thanks tom!) so I want them to be responsible for it. they thought cleaning the mag plate was nasty but were amazed to see how clean it got.

let me know what you think.

scott