I read with great intrest on how much HP is needed on a ZTR. I was told by a lot of people the 19hp Kaw I purchased on my Toro 52" deck ZTR was too small and needed more power. This past week my grass got away from me with all the rain. It was 12" tall in some spots. I mowed it at a 4" deck hight and not once did I think the motor was having a problem. Did I mow at full speed? Of course not. I am reading where mowers HP is now in the upper 20's to lower 30"s HP rating. I remember at one time when I purchased Riding mower's for a retail store the reps from the company sat around and laughed at how customers were wanting/buying 17HP motors. How unnecessary it was to have a motor that big. Today 17hp is considered small. I have an old riding mower that was purchased in the 70's with only a 5hp Brigg's on it. We mowed for years with that thing. In a day of "bigger is better" and "you get what you pay for" mentality, do you think mower mfg. are just slapping bigger engines on their model ZTR just for the bragging rights and to make a few bucks extra? How long will it be before we see a 6 cylinder car engine?