Hello , I have a murray 12 hp 30 riding mower . The first problem was it would start (turn over) . I brought an ignition switch and installed. The engine now turns over but not getting any spark (fire ) to the spark plug. I then jumped out the safety switches at each switch and changed out the 15 amp fuse. I finally disconnected the black magneto wire bypassing the safetys and it started. I mowed for an 1 1/2 hour shut down. Went back after a few minutes and it will not restart . The starter will not engage no clicking sound Nothing. Any ideas?

Thanks, Bohemianjohn

Ignition switches almost never fail. Doesn't stop people from buying them. It is a safety switch causing issues, Jumping one at a time is a good idea.

Don