BoomerFL

Hello,
I have a 2008 c180 with 23 hrs. It was working great on memorial weekend, but went out yesterday and WOT is 6400 rpms max 30 mph. I use to average 7900rpm 45 mph at WOT. All that I change since memorial weekend was a blown 10amp rec fuse, when I plugged a airpump into the 12v outlet.

The boat is up to date on its maintenance schedule thru the dealer.
I read in some posts about the SC going out. If this did happen. It would explain the loss of top end speed, but wouldn't I have gotten some engine light error,rough idling, smoke, odd noise or no power at all?

I have none of these signs above, low end power is good just no more top end.