1993 Johnson Evinrude "ET" 40 thru 55 Service Manual, P/N 508283, Page 113Get this manual
Power Test
INoteI when testmg Itthe coil's maximum Do not
specified amperage
Connect tester red lead to the primary terminal of the coil and the tester black lead to the ground tab Connect the high tension lead of the tester to the coil spark plug lead steady spark in the tester, at or before maximum specified amperage, indicates good coilRefer to Ignition Coil SpecificationsSurface Leakage Test
f41 The ignition coil is tested with "normal" polarity connections