Bought some Johnson outboards for parts and need some help to identify one of the motors. Did some research and now confused. One of the motors has QD- 16 or OD-16 on plate. My research showed it was a 10 HP, 1955. All the pics I have seen show the 55 as green. The motor is red. All the pics of red motors have been 15 hp. The motor cover has an emlbem with a 15 on it. Does anyone know if there is another model or serial number anywhere on these motors. It is in rough shape so looking quickly I did not find one. The motor does not appear to have painted and the cover seems original to motor. The bracket and model plate look original also. Confused