[quote:d96d2cf650]I have professionally rebuilt many of those carburetors. I can tell you that for certain, if you install the new needle valve just as it comes out of the box, it WILL STICK. The solution is to thoroughly CLEAN the new needle valve and seat with aerosol carb cleaner BEFORE you install it. I never had a come-back after I learned the cleaning trick.
It seems there is a residue of some sort, left over from the manufacturing process, and gasoline does make it sticky. Get rid of the residue first, and no problems.[/quote:d96d2cf650]
Can a needle valve still be cleaned of this residue after already being exposed to gas? I guess this residue is some sort of mold release agent for the viton tip. Just spray the tip with carb cleaner and maybe brush it with a tooth brush? thanks. [/quote]
This post was edited by Mr. Farmall A at 22:09:53 05/18/14.
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