1976 Evinrude 40HP outboards Service Manual, Page 38Get this manual
cLeakage testIgnition coil and high tension leads may be tested for leakage or insulation failures using the ignition testerLeakage is caused by mOisture, cracks in the coil housing or carbon pathsConnect the coil to the ignition tester per manufacturer instructionsProbe entire surface of the coil and high tension leads, flashover (arcing) will be apparent wherever insulation has broken downReplace any coil which shows leakage(High tension lead must be disconnected from ignition tester for this test See Figure 4-24 Figure 4-25Condenser Test BREAKER POINT TESTING
It is possible to check the electrical condition of the