Okay, so the problem is that it isn't idling? I had a similar problem with a Tillotson on a snowmobile of mine. These carbs, like the tillys have a rocker that works in conjunction with the float to push that little needle open/closed. Make sure that rocker isn't bent out of shape for starters. Also, additional adjustment can be made by bending that rocker one way or the other depending on how it is running.
I can snap some pictures tonight if you would like.
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