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These are a pretty basic carb and besides that, just ask the techs here and they will do their very best to help. I am pretty sure you found the problem alright. Start simple and work till you find a solution, good MO. Looking back at Joe's test......had this been effectively performed, you would have found the problem......."but folks, don't try this at home". Kinda spooky sticking your fingers in a running motor. Good job, Dgold.
I don't have a manual for your motor. I did some searching and it sounds like 6 turns out from lightly seated is a typical starting point for low speed screw adjustment.....After a lot of time and money i found that two idle screws were run all the way in.....