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Antique Gas Engine Discussion

Leak between tank and carb


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  #1  
Old 04-21-2005, 10:26:53 PM
ldj1002 ldj1002 is offline
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Default Leak between tank and carb

This isn't an old engine but it has me stumped and maybe someone has an idea for fix.

This thing is leaking between the carb. and gas tank. I made 2 new gaskets and put permatex on one, both leaked. Never made a gasket that didn't work but I went and bought a new gasket and it also leaked just like the ones I made.

I have put a lots of these tanks and carbs together and never had one leak, not even a little.

Any ideas what to try next?

L.D.
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Old 04-21-2005, 10:39:54 PM
Bill Sherlock Bill Sherlock is offline
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Default Re: Leak between tank and carb

Could it be that it's leaking through the screw threads holding the gas tank to the carb? I'd try using the blue Locktite on the threads and see if that helps. If that doesn't cure it, would look for a hairline crack in the carb body or possibility the carb is getting too much fuel and leaking out the choke or throttle shaft, making it look like it's leaking at the gasket??

Bill
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Old 04-21-2005, 10:56:44 PM
BobRR BobRR is offline
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Default Re: Leak between tank and carb

I agree with Bill is it possisable that the float level is to high, sticking or sank? BobRR
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Old 04-21-2005, 11:43:00 PM
Kevin O. Pulver Kevin O. Pulver is offline
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Default Re: Leak between tank and carb

I'm not sure of your situation, but I think the other guys are onto something. If you have been successful various times until now, there is a variable somewhere that you have not isolated. I think the high float level/thread leak sounds pretty reasonable. Kevin
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Old 04-22-2005, 08:53:34 AM
Partsman Partsman is offline
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Default Re: Leak between tank and carb

If the carb is bolted to the tank I have found a gas cap not venting will cause your problem. The pressure builds up and forces the gas out.
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Old 04-22-2005, 07:55:10 PM
ldj1002 ldj1002 is offline
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Default Re: Leak between tank and carb

Thanks all,
The problem was the diaphragm cover. It was't flat, causing it not to make a good seal on the rubber. I got a file and worked it down flat. It doesn't leak now. Sure thought it was that tank gasket first. The bottom of that rascal is right a the bottom of the carb. right where that tank gasket goes.
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