2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 286Get this manual
SFBO-SFS.SO bINSPECTION IGNITION COILS
1) Check the high tension cords for cracked or damaged insulation, replace if necessary2) Measure the resistance of the primary coil by touching
ohmmeter leads to the ignition coil's primary terminals Standard resistance 0.350.43 fl
3) Measure the resistance of the secondary side of the coil by touching ohmmeter leads to the spark plug caps Standard resistance 23 .034 .8 kfl
REGULATORRECTIFIER
Measure the resistance between the terminals and be sure that the measurements conform to the ranges shown in the table on the next pageUse tester that is equivalent to or higher than the performance specified; Internal resistance: 20 kflVDC, kflNACBe careful not to touch the metallic part of the tester probe with your body, otherwise correct resistance value cannot be obtained Read the tester manufacturer's operation instructions carefully before operation with testerFollow the instructions of the Service ManualBe sure the tester's battery is fully charged and check the meter before using the testerUse scale of an commercially available multimeter, and meter shows current flow from negative (-) to positive (+) If the meter shows current flowing one way and not the other, the diode is good