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This is one of the TSC/Tisco carbs that I had here. I noticed some differences between them.
The full kit didn't fit this carb. The gaskets did. As did the needle and seat.
Shaft seals/retainers and float pin did not. One of the shafts wouldn't fit, but I don't recall which one.
The screws holding the two halves together were smaller than M/S and the brass plugs were a different size.
This one was dead new, out of the box due to a plugged passage.
It worked pretty well once all the obstructions were clear.
But they're $200 new from TSC. I'd prefer to rebuild an original.
I also agree with you on the blanket statements. Always/Never etc.