I own a 1993 Four Winns Sundowner 215 with Power Steering and my issue is that when I turn the boat (in either direction) more than a certain angle I get a knocking sound. Once it starts knocking and I turn it more it just gets louder. My mechanic replaced my Gimble bearing and Universals this spring and once I heard this noise he checked again and can't pinpoint the problem. The knocking has the same pace no matter what RPM I am running so I do not think it is the drive shaft angles. Any comments, advice? Much appreciated.