1993 Johnson Evinrude "ET" 60 thru 70 Service Manual, P/N 508284, Page 102Get this manual
Power Test Do not exceed the coil's maximum specified amperage when testing it f4l The ignition coil is tested with "normal" polarity connectionsConnect 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
A steady spark in the tester, at or before maximum specified amperage, indicates good coilRefer to Ignition Coil SpecificationsSurface Leakage Test Do not exceed the coil's maximum specified amperage when testing itThe ignition coil and spark plug lead should be tested for leakage and insulation failures using the ignition testerLeakage is caused by moisture, cracks, or holes in the coil housing or spark plug leads