I purchased a Scag Wildcat last year with the new deck. Last year the machine ran great but this season it could not cut grass for a ****. My dealer looked at the machine and just about replaced the entire motor. When I got the machine back the problems were not fixed, so they replaced the motor (27 Kohler) with a new one and the machine still cuts out. I was told that the motor bogging out was due to using Highlift blades . Has anyone ever had this issue?