1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 118Get this manual
Power Test Do not exceed the coil's maximum specified amperage en testing the COl1 ignition coil is tested with normal polarity connectionsConnect the red lead of the tester to the primary terminal ofthe 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 coilC0A4328
f41 The C.D
A steady spark 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 the coliThe ignition coil and spark plug lead should be tested for leakage or insulation failures using the ignition testerLeakage is caused by moisture, cracks or holes in the coil housing or spark plug leadsthe tester' 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