Plastic gas tank repair?

Old 12-03-19, 06:37 AM
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Plastic gas tank repair?

I started a new thread since my situation took a left turn...

Previously, I replaced a carburetor on an old Ariens snow blower. 'Runs fine, now. But the gas tank has a leak.

The snow blower is a semi-dinosaur, and I can't find part numbers for a new tank. (partly because the Tecumseh 5HP engine has no serial #'s or markings) Are there any proven methods for repairing a leak on a plastic gas tank?

If I have to, I know I can fabricate a mount for a generic gas tank and move on. But I'd like to explore a repair on the existing tank first.

Old 12-03-19, 06:44 AM
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JB Weld.....

I dropped off a curb one time back in the 70's & the gas tank on the car hit the curb & put a tiny hole in the tank. I jacked up the car so the gas would be away from the hole. I cleaned it well & put JB Weld on it for about 24 hrs & never had an issue. We had the car for about 4 or 5 years.
I was concerned about whether it would hold up by being in constant contact with gasoline but, again, we never had an issue.

So, I'd try JB Weld.
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Old 12-03-19, 08:28 AM
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Used to do similar for pinholes but I would use a screw, a metal washer and a gas resistant washer/o-ring.
The metal washer is there so that the screw does not deform/grab the rubber washer when tightening it.
Or you could start the screw and then goop it up with JB Weld then tighten it.

Do not over tighten the screw no matter which way you go.
Snug is what you need, too tight and you risk causing more damage to the tank.
Old 12-03-19, 09:12 AM
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Just make sure you get the J-B Weld that is gas resistant.
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Old 12-03-19, 09:52 AM
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Excellent advice, y'all. Thanks.
Old 12-09-19, 01:17 PM
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I have an old plastic tank on a line trimmer that I could not replace. I used JB Welds PLASTIC weld epoxy and It is still holding.

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