Congratulations! that was a subtle one. I'll have to remember it,
because I wouldn't have come up with it on my own.
Donald.
> From: "Greg Schluge" <gschluge@cstone.net>
> Date: Fri, 28 Mar 2003 07:10:07 -0500
>
> I just finished troubleshooting my fuel problem and I feel that I have
> uncovered a weak point in the Carb design.
>
[snip]
> I took it apart AGAIN (about 4 times) and this time opened my parts carb and
> soaked both of the floats in a can of gas. Both floated exactly the same so
> they wer not sinking. So I examined both carb floats and noticed a little
> wear indent in the float leaver where it hs been pressing the needle valve
> for 30 years.
>
> I took the float lever to my buffing wheel and turned it into a mirror. The
> dimple turned into a defect in the image returned. I did not want to file
> it because it is a thin part. I also buffed the pin to a mirror finish.
>
> Re-installed the carb, and it ran perfect, default adjustments and corlor
> tune showed blue for the first time ever in 5 years.
>
> My theory is that the float geometry provides marginal force on the valve
> and the dimple provides enough lip to bind the needle with lateral pressure
> and causes the needle to stick. After five years, mine finally got bad
> enough to jam the needle and flood the engine.
[SNIP]
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