I wouldn't call myself an expert - but from my experience I'd say they're just fine.
Looks like some soot buildup from running a little rich - but assuming they're out of an old tractor, probably where you want to be.
Hard to tune for every use, old carbs just aren't fancy enough, settings are a compromise. What's rich while riding it in a parade might be just right for plowing, etc.
No matter what the use, you're almost always better to leave it a little richer than lean.
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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