1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 115Get this manual
Stop Circuit
r.J r:;"] The stop buttonkey switchand emergency stop
switch are connected to the ignition module through the engine wiring harnessWhen activated, these switches direct the ignition module output to ground, stopping the ignition systemsteering contains combination stop switch emergency stop device When the clip and lanyard assembly is removed, the emergency stop device is in the STOP position When the clip and lanyard assembly is installed, the emergency stop device is in the RUN position To stop the engine when the clip and lanyard assembly is in place, press the stop button until the engine stops