1996 Johnson Evinrude "ED" 90 CV 88 thru 115 Service Manual, P/N 507126, Page 99Get this manual
Power Test
r:::-=J Do not exceed the coil's maximum specified amperage
when testing itConnect 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
r.il The ignition coil is tested with "normal" polarity connectionsA steady spark, in the tester at or before maximum specified amperage, indicates good coilRefer to Ignition Coil SpecificationsSurface Leakage Test
INotel Do not 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 leadsthe tester's small black and red leads still connected, remove the tester's high tension lead from the coilTurn on the tester and probe entire surface of the coil, spark plug lead, and spark plug coverFlashover will be apparent wherever insulation has broken downReplace any coil or spark plug lead that shows leakage