Mercury 18, 25hp lower unit assembly 8157A7,8669T13, 8669A13, 8669A11 short shaft, pressure tested ( it passed) and had a new water pump impellor installed. Shipped with no gear lube.Used unit from a fresh water outboard. Comes with the water tube also. Shafts are good no twisted splines. Skeg is good no bends and no chunks out of it. Security Seal 524005.