I am having trouble with the blade quitting after running the mower for a time. It will start up and the blade engages as normal, then the blade shuts off after some mowing. I let it sit for 20=30 minutes and it will engage again. It the electric clutch bad? How do you tell? Any suggestions on how to repair would be appreciated. I can turn a wrench, but diagnosing electrical gremlins is not my strong suit. By the way, I bought the mower used and the wiring is a mess under the seat. Really cobbled together. It will occasionally burn the blade fuse as well.