So my dad ran his boat into the shallows and broke the skegg off of his outboard. The internals were undamaged, so I just needed to find a replacement gear case. We pulled the unit and found a casting number, 1647-9147. I did a search but each listing references a C#. We are not finding any other markings on his unit.
It's an 86 mercury xr2 150 black max. Had anyone dealt with this before? I am also unsure of the gear ratio. I do know it is a 20" model.

