i have a 1995 230 dancer with an alpha gen2 5.0 engine . i purchased the boat over the winter and i took it out for the first time over the weekend. i noticed around 3500 rpm it has a high pitch noise from the rear of the boat? it only makes the noise in gear under load? i have checked the lower unit oil for any metal...none. i checked the gimbal bearing...very smooth. it does not mater if you are turning ,trim up ar down the the high pitch noise or whistle is there? i have a 4 blade alum prop not a ss. i have been told by other people that it may be a harmonics? has any one else had this problem
