When I engage the Blades on my Cub-cadet XT1, The machine will cut for about 10 secs, than the blades will stop, I reengage the PTO again it cuts and stops, and cuts and stops. I trouble shot the PTO witch, it seems to be fine. With the key on and the motor not running. I can hear the clutch engage when I pull the PTO. Anyone know what the problem could be?( its almost like the machine thinks its in reverses at wont cut?)