What are your symptoms? I ask because I thought my ignition switch was going bad because sometimes when I turned the key, nothing would happen. I could always release and turn again and it would turn over, but it gradually got worse. After talking with the parts guy at the shop, he convinced me that it wasn’t the ignition switch, but a relay or something that is located under a cover on the top of the motor at the back. I replaced that and my problem went away. This was on an Indmar.