1988-1992 Mercury Force 5HP Outboards Service Manual, Page 68Get this manual
3 Install enrichment valve assembly Make sure friction spring and ball (A) are in placeSlide shaft (8) into housingPosition shaft so flat surface faces out, as picturedSecure shutter (C) to shaft with screwDo not tighten screw
NOTE: Be sure valve is positioned as shown Open and close valve few times to seat shutter in housingTighten screw