1997 Johnson Evinrude "EU" 125C, 130, 200, 225, 250 90 LV Service Manual, P/N 507269, Page 130Get this manual
Power Test
Note Do not exceed the coil's maximum specified amperage when testing itThe C.Dignition coil is tested with normal polarity connectionsConnect the red lead of the tester to the primary terminal of the coil and the tester's black lead to the ground tab Connect the high tension lead of the tester to the high tension lead of the coilA steady spark, at or before maximum specified amperage, indicates good coilRefer to Ignition Coil SpecificationsSurface Leakage Test
Note 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[] With the 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 which shows leakage