My mower slowly got worse, It will not cut though thick grass that it use to plow right through. The blade speed will slow, the belt will start to slip and make noise, and it will also slow Rpms. I even tryed side discharging and it will bog down, pretty easy. I dont think there related, but the 17hp Kawisaiki, is having a problem with the govener going up and down, It dont do all the time, but thats how it started a month ago. Last time we changed the spark plugs, air filter, oil, coils, fule pump, carb. and it was fixed a week are so, then it did it again, and freind said the bolt on govener was loose and we adjusted the carb, and some how it was fixed for a few more weeks, and here Iam again. This mower only has 200 hours. Thanks for any help!