Posted by rustyfarmall on January 03, 2012 at 12:20:46 from (216.248.71.224):
In Reply to: 140 carb problem posted by nnaatz on January 02, 2012 at 20:41:50:
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Bob, I have never done such a thing as "coining" or tapping on a needle to seat it. The only thing I do that is not suggested in any repair manual is to spray both the needle and seat liberally with aerosol carb cleaner, blow them dry, and then MAYBE a quick shot of silicon lube on both just to prevent sticking on the initial start up.
The Viton tipped needles were developed to get a longer life from the needle and seat. The old, all steel needles would wear a groove where they contacted the seat, and naturally then they would leak. Tapping on the needle to seat it CREATES a wear groove, which is exactly what you do NOT want.
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