I had the same problem last year when I was in the water. The starboard engine blew the main fuse while it was just sitting at the dock. I had NO power to that engine. Pulled the cowl off and the fuse is right there in the harness . I have Evinrude Ocean Pros . I replaced the fuse to see if it would blow again and I haven't had a problem since. I guess the fuse was just at it's end of service. I hope this helps you out
joe.