exhaust problem

I have salt deposits on the exterior of exhaust hoses and engine pulleys, front part of engine and underside of component on top of engine (Port Engine). Engine compartment floor has spray lines from water being deposited by spinning pulleys/serpentine belt. There is a noticeably louder hissing...

Over the last couple of years I have noticed large amounts of exhaust carbon building up on the hull after longer trips and the fiberglass is beginning to yellow and crack. I then questioned whether the exhaust is coming out the bottom like it is supposed to and watch the exhaust port on the...