I NEED HELP, I JUST BOUGHT A BOAT WITH A VOLVO PENTA IN-BOARD. I NEED SOME HELP UNDERSTANDING WHAT MAKES THE TRANSMISSION WORK, WHAT TYPE MAINT. NEEDS TO BE DONE TO IT AND THE STUFFING BOX AREA. ALSO I HAVE A WHINE AT LOW SPEED FROM THE STUFFING BOX. IS THAT NORMAL? ALSO IS THERE ANTY BUSHINGS /...