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Old 10-12-2020, 12:35 PM   #18
Brentwood Bob
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Join Date: May 2010
Location: brentwood, ca
Posts: 3,173
Default Re: Zenith Carb Leak Puzzle

Seems like you have zeroed in on the gaskets for the needle valve.
Multiple gaskets are problematic, also the mating surface in the casting.
Rust from the tank also was mentioned, probably even the Viton valve would have trouble with rust.
Try one thing at a time to get to the cause.
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