1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Manual, P/N 507124, Page 113Get this manual
The power pack has several basic functionsIt stores and distributes the voltage received from the charge coilThe power pack uses electronic switches (SeRs), activated by sensor coil output, to select the correct ignition coil primary winding for firingThe power pack has an RPM counting and RPM limiting circuit to protect the engine from damage due to severe overspeedingThe power pack incorporates the S.L.OWTAl warning system, which limits engine speed to approximately 2500 RPM if engine temperature exceeds 2400 (116 e)Once the S.L.O.Wwarning system has been activated, the engine must cool to 207 (97 e) and the engine must be stopped before normal operation can be resumedStop Circuit][] The stop buttonkey switchand emergency stop switch are connected to the power pack through the engine wiring harnessWhen activated, these switches direct the power pack output to ground, stopping the ignition system[]] The steering handle 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 inward until the engine stopsIgnition Coil