Got a 2012 RZT42 Cub. About 2 seasons ago I noticed that when it got hot after being run for a while, the blades would not engage right away after being turned back on. This just kept getting worse, now last week the PTO shut off while engaged and mowing. Now I cannot get the PTO to engage again. Am I looking at a new electric clutch? Thanks for any help, you all can provide.