teepee

My early 1980's Troybilt Horse just recently gave up it's engine - it was a 5HP Tecumseh hh50 - I don't know if it had been replaced in the past or not since I bought it used. Instead of trying to rebuild it right away I purchased a new Tecumseh HH60 from smallenginewarehouse for $199 with free shipping. Their websight said it would fit excet for the end crankshaft bolt which is 5/16 x 24 on the new engine, the old one was 3/8 x 24 tpi. So far everything is as they said. My only concern is that the reverse pulley that mounts on the very end of the crankshaft has a 3/8 in mounting hole. I have been trying to find a 3/8" to 5/16" sholder bolt to solve this problem to no avail. Everyting seems as though it will go together OK, so for now, I think I will bolt everything together and just try not to use reverse yet. My only option for the 3/8 to 5/16 bolt problem is to have a machinist to make me one since I am sure of what I need. If anyone else has had this problem and found an answer please post.

Thanks...