Quote Originally Posted by Eric Brown View Post
Gentlemen, I think this will be my FINAL REPORT.
Took cold compression checks. All 77/80. Confirmed correct crank to cam gear indexing thru the RH mag mount hole. Reinstalled RH Bendix mag. Swapped spark pugs top to bottom. No change. Don't believe it is a vibration. It's scatter miss. Da......... da ......da..da..da...................da .......da.da.......... Shakes the airplane. Put the cowling on it and took to full power. Turns a smooth 2425 RPM with a Sensenich 6948 prop. I'm going to use it this way and see if it may improve (spook theory) over time. Figure to have the airplane back together and flying within 30 days.
Your two symptoms of, it runs worse in cold weather, and it makes no difference where the idle mixture is set. makes me believe the carb idle circuit is not providing enough fuel when you are below the RPM of the cruise circuit.

So my question would be, Is this a newly rebuilt Kelly carb?