1991 Johnson/Evinrude EI Outboards 2.3 thru 8 Service Manual, Page 44Get this manual
Synchronization and Linkage Adjustments -
It is important that this step-by-step procedure be followed in sequence and be performed exactly as written to ensure consistent engine idling and smooth operation throughout the RPM rangeCam Follower Pickup Point
", 1Connect the throttle shaft amplifier, such as the one shown, to the carburetor throttle shaftf21 2Advance the throttle until the tip of amplifier begins to moveAt this point, the roller should align between the two notches in the camr:;J 3Back out cam follower adjustment screw with OMC Ballhex Driver PIN 327622 until the throttle valve is closed completelyThen advance the screw until the throttle shaft just begins to rotate4Repeat Step to verify adjustment