1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 49Get this manual
2Loosen the upper carburetor lever adjusting screw Igl
3Partially rotate the throttle shaft open and allow it to quickly snap to the closed position to be certain the throttle valve is closed in the throttle borePress lightly on tab of the adjusting link to remove backlashTighten the adjusting screwMove lower throttle shaft and check that both throttle shafts start to rotate at the same time
Cam Follower Pickup Point
1Connect throttle shaft amplifiersuch as the one shown, to the top carburetor throttle plate
f11l f12l
2While advancing the throttle cam, the lower embossed mark on the cam should align with the center of the throttle cam follower as tip of the amplifier begins to move3To adjust, align the lower embossed mark on the throttle cam with center of the cam follower (follower screw should still be loose)Allow the throttle spring to close the throttle valvesWhile pressing on the cam follower lever, hold the cam follower against lower mark on the throttle cam and tighten the screwRecheck that the throttle valves begin to rotate as the embossed mark aligns with center of the cam follower