1988-1992 Mercury Force 5HP Outboards Service Manual, Page 98Get this manual
LTESTING COIL PRIMARY CONTINUITY 1PI ug black test lead into -COM (A) and red test lead into(8) of multimeter (Special Tool NoTA11259) Set meter to x1 ohm ,scale (C)Zero out by touching test leads together and turning Oadjusting knob (D) until meter reads zero (0) on ohms scale (E)