They look good to me, especially for not getting worked hard. Some of the soot could be oil. The insulator is perfect!
Set the carb to what runs best.
Not having an accelerator pump, it will have to be slightly rich to not stumble. Nature of the design.
Most updrafts, the idle mix screw adjusts air bleed, not fuel, so turning the idle screw in richens the mix, out leans it. But that adjustment will have very little effect on the overall mixture.
If it were mine, I would be very happy with the plug reading!
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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