Mercury Force 9.9, 15HP Outboards Service Manual, Page 73Get this manual
KTESTING CONDENSER FOR SHORT 1Plug black test lead into -CO (A) and red test lead into +V (8) of multi meter (Special Tool NoFTA-1 12S9) Set multimeter to the xl ohm scale (C)Zero out by touching test leads together and turning zero adjusting knob (D) until meier reads zero (0) on the ohm scale (E)