Steve, i enjoyed watching some of your vids. I noticed that you sprayed ether in the intake and then cranked it, many good crankshafts have been broke using this method, you should have it cranking then spray in a little ether. i also noticed that after you used the ether you tried the preheater, that could cause an explosion. did you notice that when you spin it with the starter that it has like different sound as it turns over? to me this means it either has a stuck or burnt valve. sure is nice seeing someone saving that old tractor, chuck