1974 Johnson 40 HP Outboard Motors Service manual, Page 37Get this manual
c Leakage testIgnition coil and high ension leads may be tested for leakage or insulation failu es using the ignition testerLeakage is caused by mOisture, cracks in the coil housing carbon paths Con nect the coil to the ignition tester per manufac turer instructionsProbe entire urface of the coil and high tension leads, flashover (arcing) will be apparent wherever ins ulation has broken downReplace any coil which shows leakage(High ension lead must be disconnected from ignition este for this est See Figure 4- 24 Figure 4- 25Condenser Test BREAKER POINT TESTING
It is possible to check the electrical condition of the
HIGH TENSION
points with the Ignition testerConnect one test lead to the breaker arm, nd connect the second test ead to the breaker assembly screw terminalIt Is not necessary to remove the breaker assembly from the armature plate;-however, leads must be disconnected for this est
(SECONDARY )