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!
Buzzing with key off? Undo do the battery!
Or it it a rapid clicking at solenoid when key is turned to start? If that is it, then battery is dead or cables are dirty, not enough voltage to the solenoid.
I see nothing there on the model I picked. See link below. Is it a plug in relay, and it is with key OFF>