i am having problems with my 17hp kohler (kt17s) on my gravely tractor. it is running very strange, it is not running that steady, making alot of noise and lacking power even at higher rpm's. i think it has something to do with the ignition. i took the cover off the breaker points and ran it, the spark was jumping all over. i figured it was mosture so i sparyed and dryed them ran it for a while, no problem and i put the cover back on it. about an hour later i started it back up to use it and the same problem all over. if anyone has any idea of what to do or what it wrong please help me out, i need the tractor for the winter. thanks. it also has 1900 hours on it if that matters, but has had regular maintince.