PER SCAG: They change the TT's speed through implementation of different size pulleys and belt lengths. They do this for the reason of not taking power that needs to be utilized for cutting purposes away from what they consider a marginal engine. They do not want to rob power from the cutting side enabling the mower to achieve another 1.5 mph on the ground speed side. I asked the question about why Kohler had not followed Kawasaki in labeling actual hp, he told me this fall Kohler would begin following the same labeling standard as Kawasaki. He also stated Vanguard had been using actual hp in their labeling for many years, what "many years" meant, I don't know.