To the gentlemen with the 7-50 UMS engines..
Were you able to get your problems worked out.
I picked up a used (very little if any) one and have it setup to test run. Life keeps getting in the way.
It has the stock UMS carb.
I am going to start out with Lawnboy 2c oil, Seafoam, and non-ethanol fuel at 32:1

Question for Tom...do you think the Saito carb like used on the 5-55 would be a good fix if this one has issues?