Originally Posted by WVDpoker
kohler CV23S 23hp which I can get brand new for $500
You can get a brand new one for $500 where? Seriously, that would be killer info.
When swapping motors, the main thing is the crank length and diameter. Also check the wiring and throttle/choke cables, see if they are the same or seperate etc. I'm pretty sure if the manual calls for the Kohler, it is the same crank and bolt pattern. Good Luck
Edit, if the clutch is the same, they are definitely the same crank size.