My mower is a 42" Cub Cadet zero turn, a 2017 model with about 110 hours on it. I mowed my lawn and stopped to move some lawn furniture. When I engaged the blades they engaged for maybe 20 seconds and stopped. I thought I had slung the belt but it was intact. Tried it a few times and each time it would engage for a few seconds and then disengage. After a few times of this it will not engage at all. Bad Switch? Thanks in advance.