2V help needed

The carburator on my 273 is a Ball & Ball.
It has been rebuilt by my mechanic but has
not performed. Now it is flowing fuel out the top
like the float wont hold and loading up & flooding
out at idle. Can this be tuned or do I need to replace
it with another 2v carb of another brand, and if so what
should I look for.
Thanks, Rat

Need to check your float first and make sure, it floats. Brass floats can spring a leak and fill with gas and sink. And composites can become saturated. It it checks out good,make sure there is no trash in the needle and seat and reset the float level. Those are pretty simple carbs.