1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Manual, P/N 507263, Page 44Get this manual
Cam Follower Pickup Point
Connect throttle shaft amplifiersuch as the one shown, to the carburetor throttle shaft
[] 2Advance the throttle until the tip of amplifier begins to moveAt this point, the center of the roller should align with single mark on cam
3To adjust, use OMC Ballhex Screwdriver, PIN 327622Back out cam follower adjusting screw until the cam and cam follower do not touchTurn in screw until amplifier begins to move and check to verify the mark on the cam aligns with the center of the cam followerRepeat procedure if necessaryIf air silencer is on, remove plug to adjust screwReinstall plug after procedure
Wide-Open-Throttle Adjustment
1Adjust throttle stop screw until the tip protrudes in(8 mm) through the throttle lever
2Open throttle to wide-open position and verify that the throttle shaft pin is verticalIf adjustment is required, turn the cam screw in to open the throttle valve and out to close it using OMC Ballhex Screwdriver, PIN 327622Maximum Spark Advance