Re: Synchronizing a 1952 Johnson QD 13 Home › Forum › Ask A Member › Synchronizing a 1952 Johnson QD 13 › Re: Synchronizing a 1952 Johnson QD 13 lloydUS Member - 1 Year (includes $3 online payment fee)Replies: 453Topics: 4 September 20, 2018 at 9:08 pm #83287 If I remember correctly, there should be a scribed line on the cam plate that should line up with the throttle roller just as the throttle starts to open. That’s why the cam plate can be adjusted in or out.