I have an 60" '03 TT with 1100 hrs on it. The mower runs great, cuts great, does everything great, I bought it used last fall and am very pleased. I then jumped on my friends identical mower, with only 600 hrs on it, and the thing feels 10x faster than mine! Does anyone have any ideas? Do mowers slow down with time? Mine is running fine, rpm's are right, the hydro fluid is clean, everything has been maintained to a T, what gives?