Mercury Force 9.9, 15HP Outboards Service Manual, Page 69Get this manual
GTESTING COIL PRIMARY CONTINUITY 1Plug black test lead into -COM (A) and red test lead into(8) of mu lti meter (Special Tool NoFTA-11259)Set meter to x1 ohm scale (e)
3Zero out by touching test leads together and turning zero adjusting knob (0) until meter reads zero (0) on ohms scale (E) NOTE: Coif and condenser testing can be accomplished using coil tester such as those manufactured by Merc-D- Tronic or Grahm-LeeConsull the operator's guide for the equipment being used for specifications and proceduresRefer to troubleshooting procedures at the end of this section for test ing the later style ignition systems