Hi i am selling this 20”standard rotation lower unit that was removed from a 2004 Yamaha 50 2 stroke motor its in good shape shifts nice and smooth and oil didn’t show any signs of water intrusion and magnet didn’t show any signs of excessive wear this will fit 2 stroke motors 40-50 Hp I highly recommend changing out the water pump impeller before using this unit please feel free to ask any and all questions thanks