Home › Forum › Ask A Member › Johnson CD-11 throttle/mag linkage question › Re: Johnson CD-11 throttle/mag linkage question
Those throttle position indicators on the twist grip are not accurate, so please don’t judge the idle performance based on the twist grip saying it is in the "start" position. But, you seem to indicate that the engine craps out just as the throttle cam pulls off the cam follower, do you have the cam and follower synchronized correctly? There is a line on top of the cam, the cam should just start to open the throttle cam follower (throttle arm) when the line and follower meet. The throttle cam has two screws that can be loosened, so its positioning can be adjusted.
The engine won’t idle correctly if the throttle plate does not close completely at idle speeds. The engine will run rough/rich off idle if the cam starts to open the follower/carb butterfly too late.