1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 56Get this manual
Cam Pickup Point f51 1Before proceeding, ensure that the throttle cam follower screw is still loosef51 2While holding the cam follower against throttle cambegin to adjust the throttle arm stop screw until the cam and the cam follower are touching at bisect point Cd) on the throttle camf51 3When the throttle arm stop screw is properly adjusted and the cam and the cam follower are touching at the bisect point, tighten the cam follower screw Do not readjust the throttle arm stop screw after this stepNote There must be 0.005 in(0,13 mm) clearance between the throttle cam and cam follower to ensure that all throttle plates are closed at idleWide Open Throttle Stop f51 1With the engine not running, move the throttle arm and linkage toward wide open throttle positionLoosen the locknut CDAdjust the wide open throttle stop screw so that the carburetor throttle plates approach wide open positionf51 2Adjust the screw until the W.O.Tmark in the cam follower bracket is facing directly forward and perpendicular with the air silencer baseTighten the locknut CD while holding screw Throttle Cable Installation-