Hello everyone i posted a earlier post on a drive shaft making noise. I have a 2005 bayliner with a 3.0 mercruiser on it. after pulling off the outdrive i inspected the u-joints the look great and are not loose. I also changed the gimbal bearing why i was in there and had it aligned. From there i took it out on the water and when i first put the boat into gear you hear this grinding noise and what sounds like a exhaust leak. I stuck my head over the back and could hear a knocking noise. This sound gets louder at 2700 rpm and goes way while in neutral. I'am pulling out my hair chasing the noise so any suggestions would be helpful. I also checked the gear lube oil it looked fine.
