I am looking at buying a Sea Ray. I have always had outboards, so and I/O is new to me. The price is right, but I have a concern regarding the outdrive. <br /><br />It is a 1979 Mercruiser, but it has an Alpha Drive outdrive. When you go from neutral to reverse, it makes a slight grinding noise. The owner says that it has done it for about two years, and it has never been a problem except that it's a bit annoying at times. What could this possibly be and can anyone give an approximate price on how much money it might cost to fix it? Also, is it something to be very worried about. <br /><br />Thank you in advance for any help that you can give me!