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.