So the last time I was getting ready to clean my boat for whatever reason I thought it would be a good ideal to flush my engine using the water hose port located next to the pee hole on my 2009 Mercury Optimax 150. I hooked it up turned on the water hose and water was mostly coming out the pee hole. I continued to let the water run while i was doing something else and I heard a different noise, looked over and water had started squirting out the exhaust port. I thought well maybe that is normal. However, upon taking it to the lake this weekend I noticed my water PSI on plane was at around 5-8psi where it is usually 10-15 on plane, idling psi was still about the same 3-5 PSI. Still had good pee stream, did not get no alarms. I also noticed at idle there seemed to be a lot of turbulence in the water around the lower part of the engine. Any ideals on what I might have done ? Any help will be appreciated, thanks.