I just changed the lower shift cable. The old one was sticking and causing the interrupt switch to stay on. Got the new one in no problem. I thought the interrupt switch was for going into gear, forward and reverse. But after reading #9 on this forum, (how the interrupt switch works), I am confused. I am not in the water so maybe that will make a difference. Can someone tell me if the grind is normal or not. I honestly don't remember if that was the norm.