Home › Forum › Ask A Member › 1963 Johnson QDL-24 10HP › Re: 1963 Johnson QDL-24 10HP
Well, that pic looks to be close to where everything should be with the throttle closed (with pin in the throttle arm horizontal). Now, you must adjust the cam (the thing that the roller rides on). Loosen the two bolts on the underside of the cam and adjust so the throttle just starts to open when the roller hits the mark on the cam. If you can’t pull the cam out far enough to make this happen, then loosen the set screw and adjust the arm slightly to make it so. Then tighten everything up. Put the shift lever in forward and fully advance the throttle. (The throttle will only advance about half way in neutral). The roller should now be at the end of the cam and the pin in the throttle arm should be vertical (butterfly fully open). If the butterfly is not fully open after you’ve made the adjustments, then your roller is probably worn out.