I have a pre-alpha, MC-1 I think, 1973 mercruiser 165 sterndrive that is attached to a 70's 18' tri-hull. I finally got it in the water yesterday and had a couple of problems with the sterndrive. When putting the boat in forward, it wouldn't go into gear until I pushed the throttle about 20 per cent forward. It would then kind of click a few times before engaging. it would then not respond at all until I put the throttle about 80 per cent forward; the same problem in reverse. Also, when in forward it will not go back into neutral until I put it in reverse and then back into neutral and the same problem when going from reverse to neutral. Is this a problem with the sterndrive, the throttle, both, or what? Any help or resources for me to learn more about the components in question would be appreciated.