Re: Identifying a ’80’s or newer Johnson 15HP Home › Forum › Ask A Member › Identifying a ’80’s or newer Johnson 15HP › Re: Identifying a ’80’s or newer Johnson 15HP MumblesReplies: 5764Topics: 298 October 28, 2018 at 1:18 am #85085 I’ve seen lots of service motors with one ordinary clamp screw handle and one like the one shown. Maybe an option for locking the motor?