I put the boat in Saturday for the first time this year, ran 3 hours and shut it down for the night. Sunday when I turned the key it made a very brief click and then nothing with subsequent turns of the key. Wiggled key, rattled shifter, wiggled battery cables, wiggled coupler where engine harness is joined. Started fine, ran 150 yards at idle and cut off. Did the same series of wiggles etc, it stated and I ran 2 hours back to the trailer. Went to start to flush...same thing. Did sveral restarts to check and it started well. I am guessing a bad ignition switch, kill switch, neutral safety switch or harness connection. Any suggestions or diagnostic tips would be greatly appreciated. 1992 454 King....stock aprox 350-400 hours. Thanks