I think I am making headway...
New Gaped Plugs, Adjusted valve lash, replaced Carburetor, messed with throttle, and governor adjustments. Checked mechanical advance, to be sure it wasn't frozen, very little change...
tweeked the timing counter clockwise, made it a little worse, tweeked the timing clockwise, a little better, five more tweeks, the engine is really starting to sound about right. I used the machine yesterday to do repairs to my roof, tweeked it one more time when it stalled trying to swing the basket. I was actually able to use it, and move it almost like it was meant to be used, big sigh of relief! I still have a few more things to fix on it, but it is looking positive
Thank you OFF for your advise and support. I really appreciate your assistance, and this forum for being here, and giving lots of ideas and advice.