Re: mystery hole in sterndrive
Okay - I can see the quadrant up in the left side of the photo: it's an OMC Stringer. Dunno' which one for sure, but it looks electric shift. The hole you're looking at is the the lube hole for the swivel - best illustration for it I can find right now is this:
There should be a small plastic screw in piece that is illustrated in that image. It might be a little tough to find one, but I would look for an exhaust housing for the drive and it should come with it.
What year boat and HP engine do you have?