Can anyone help me out??<br /><br />I have a Yamaha 75 (1992 approx) with a cracked gearcase. I also have a slightly older Yamaha 85 gearcase. Are they interchangeable??<br /><br />The only difference I can see is that the 85 drive shaft has a spring loaded pin at the splined end that locates in the power unit. What does this pin do?? <br /><br />Any help is very much appreciated. Thanx.