1984-1986 Mercury Force 4HP Outboards Service Manual, Page 64Get this manual
5Check shift pin and shift cam for wearShift cam will wear on faceFigure 18 7Inspect gears lor wearMeasure bearing nner diameterFigure 21
.5000 .5007
WEAR AREA
Flgur.1VClutch Shift CamFlgur21 Me.surlng rlng
Excessive wear on crests may allow motor to drop out of gearSInspect propeller shaft bearing cageBearing cage seat is replaceablethe bronze bearing Is notBearing cage must be replaced il excess wear is found in bearingA
8Inspect gear housingAMeasure inner diameter of Iront gear bearing Figure 22