I have a Cub tank. Its a 2006 that I got on clearance. It has the 25hp Kaw. and a 60" deck. THe machine only has 42 hours on it. The pto takes between 10-30 seconds to engage and when it does its weak. I have the RPM set right. Plus it seems week, even when I'm cutting 1" of blue grass that isn't that heavy... the motor bogs down. I know its not just under powered... its weaker than normal. While I was cutting today the blades just randomly shut off and they wouldn't turn back on. Would you say its time for a trip to the dealer? The machine has alrady been there for a hydrolic leak... I didn't take it in when the front anti-scalp roller fell off, I fixed that on my own. I have less problems with a 9 year old John Deere walkbehind with 1000 hours!