Lower unit Oil
Typically on the starboard side of the motor at the bottom of the shaft you should find two screws, one above and one below the prop shaft. Removal of these screws will allow the lower unit oil to drain. Putting the oil back in is always fun. Load oil into the lower hole until it comes out of the upper hole, install upper screw, then install lower screw while losing as little of the newly installed oil as possible.
