1991 Johnson/Evinrude EI Outboards 2.3 thru 8 Service Manual, Page 107Get this manual
Stop Circuit
'al The stop buttonemergency stop switch is connected to the
ignition module through the engine wiring harnessWhen activated, the switch directs the ignition module output to ground, stopping the ignition systemsteering handle contains combination stop switch emergency stop switch device When the clip and lanyard is removed, the emergency stop switch device is in the STOP position When the clip and lanyard is installed, the emergency stop switch device is in the RUN position To STOP the engine when the clip and lanyard is in place, press inward on the assembly until the engine stops