Hi, John
  In Feb I was using my 88 when all of a sudden the engine would try to "run away" and the RPM's would skyrocket. I'd just hit the kill switch and restart it and it would be fine. It did this a couple of times and I dismissed it as having to do with the 10 degree weather we were having and never thought much more about it. 
  The tractor hasn't been started since then and when I had it running today, it did it a couple of times. The throttle lever was less than half way down (above the split in the quadrant casting by a notch or two) at the time. It had just tried to stall and I had used the choke to catch it before the engine died. When the RPM's came back up it really" took off". I assume (yeah, yeah, I know) this has to be a governor problem. Your thoughts as to a cure would be most welcome. 
                                                Jim Thurnau