1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 246Get this manual
High Voltage
In some conditions, the key switch may be shorting (allowing some leakage) to the other terminals in the key switch, but will not show up with test light or an ohmmeterThis condition may be found by using condenser tester (leakage test) where voltage of approximately 500 volts is applied to the key switch terminals