I jummped in with bolth feet!!! After dealing with the smoking sence I have had the tractor, and just this last week it doing some STRANGE things, and making odd noises, I decided its time. Better to rebuild it now, then to wait till something pops in the summer, when I have les time, and more need for it. Few things I have Q's about though. here is the list....... Rebuild kits. What are my options, and were is the best place to get them? Sleves. I have a lot of cyl wear, so I will be replacing the sleaves. How do I know if I have the cast, or thin tin ones? The searal number is REAL early[ 8N14644] but the motor has been into before, so it may have been updated.[already has the new style adjustable valves in, so someone has been in there before] Any tips, or tricks for me? I have rebuilt many engines, but never one of these. I have many pictures of the tear down, and I will take more of the rebuild, but have not had a chance to upload them yet. but there coming.