I am looking to but a bigger motor for my lawnmower and I had this thread before but I cannot find it now. I talked to someone from exmark and he gave me the specs that I needed to get what I wanted. I am trying to get him back. I have a kohler 22 hp horizontal shaft and want a 25 horsepower. Does anyone out there know if that will make a very big difference? I am curious to know if anyone else has went up like that.