Honda BF35A-BF45A Outboard Motors Shop Manual., Page 381Get this manual
16ELECTRICAL EQUIPMENT 1CD1 UNIT 2POWER COIL
3ECT (Engine Coolant Temperature) SENSOR
4INDICATOR
1CDI UNIT
aINSPECTION
Measure the resistance between the terminals and be sure that the measurements conform to the ranges shown in the table belowUse tester that is equivalent to or higher than the performance specified; Internal resistance: 20Be careful not to touch the metallic part of the tester probe with your body, otherwise correct resistance value cannot be obtainedRead the tester manufacturer's operation instructions carefully before operation with testerBe 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 flowing from negative (-) to positive (+)