1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 114Get this manual
Power Test
Do not exceed the coil's maximum specified amperage hen testmg the COl'1
L!J Connect tester red lead to the primary terminal of the coil
The ignition coil is tested with "normal" polarity connections
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 Spe'tificationsSurface Leakage Test