1988-1992 Mercury Force 5HP Outboards Service Manual, Page 81Get this manual
3 Carefully locate reed over openings in reed plateA minimum of 0.030 inches (0.76 mm) overlap is required -
0.030" MINIMUM
OVERLAP
4Install reed stop Secure with two screws with lockwashers (A)0.250" 0.010"
NOTE: Reed stop opening must be 0.250 0.010 inchest