Do you have a fresh water flush fitting where you attach a garden hose for flushing the salt out of the sea water side of the cooling system?

No flush fitting. It's a 2004 Bravo 1 X (0W224912). Could it possibly be the exhaust manifolds restricting the water flow?

Have you checked the water intake tube from the drive to the SWP for corrosion/restriction?

No I have not. I guess that would be next...thanks.

You say it creeps towards 190 at 5000 RPM? That's not that bad. Mine will to and you also need to scan that engine to see what the real temperature is. That dash gauge my not be very accurate.

Ever figure out what was wrong bc my 2003 36 ft baja outlaw with tiwn 496 hos is doing the exact same thing new impeller ... had backplate of pump resurfaced cleaned and check hest exchanger changed coolant .....?

well, im having the same problems. did yall figure it out? i have done everything except changing out sensors