Dogman:
Glad that you finally got yours running
Finally gave up trying to fix it myself
Took the roto-tiller down to the local shop. They did the usual tune-up stuff (already did that

) and an inspection. Seems like they may have found the problem. There is low compression and the carb is cracked. It might last a year or two but not certain as it is really an ollllddd engine.
The sure cure is to buy a new roto-tiller, but that is really not on my list of I have to do's, nor my want list. I like my very old roto-tiller, it is almost as old as I am and is made very well, unlike the new ones where even the tines are stamped steel and a light guage at that.
Maybe I will have to find another old engine and give that one a rebuild. Then I can take this one down and see what can be done to restore it.