Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
By th electrical schematic for the mower, there is nothing in the circuit, but the electric clutch and the pto switch. The clutch may be pulling too many amps. Clutch should pull less than 5 amps, anything more will overheat the switch and wires.
Check to be sure the load on the clutch from the deck belts and spindles is ok, and they turn freely, if they do, the electrci clutch is likely failing.