I found the problem. After I soaked the carb and blew out all the passages I reassembled the carb
without any improvement in the way the B ran. Last night I was looking for something on the
workbench and there was the AC B,s carb venturi. Another senior moment, I had assembled to carb.
without it. Replaced the venturi this afternoon and the tractor runs fine. Getting a cotter key
in the govenor shaft behind the carb is sure a pain to put in. Sorry for my mistake, its like
walking to the barn to get something and forgeting what I went for.