Motor dropped to about half power and electronics failed
I checked my lights and bilge before taking off and all was fine. I ran my boat, i have a 1987 Mercury 60 HP, about 5 minutes when this happened. There was a quick almost hissing noise, then the power dropped. I checked everything I know, and that's not much. I hard wired the bilge onto another battery and it worked. The middle trim and depth finder still works, but that's all. Any info on a starting point would be great.