1988-1992 Mercury Force 5HP Outboards Service Manual, Page 72Get this manual
RADJUSTING PICK-UP POINT (1990 and Newer) 1Turn adjusting screw (A) counterclockwise until fully backed out
2Advance throttle control lever until roller is centered with short mark on throttle camNOTE: The throttle must be fully closed for this procedureThe idle stop screw (AJ may have to be backed off to make this possible