Honda BF20 BF2A Outboard Motors Manual, Page 29Get this manual
bINSPECTION
TRANSISTORIZED IGNITION COIL
Primary side
Measure the resistance of the primary coil by attaching one ohmmeter lead to the ignition coil's primary (black) lead while touching the other test lead to the iron corePrimary side resistance value
ANALOG VOLT-OHMM ETER NOKS-TH-5H-1
DIGITAL VOLT-OHMMETER NOKS-AH-32-003