1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 113Get this manual
The 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.OWwarning system, which limits engine speed to approximately 2500 RPM if engine temperature exceeds 2400 (1160 C)Once the S.L.OWwarning system has been activated, the engine must cool to 20r (970 C) and the engine must be stopped before normal operation can be resumedStop Button []] The stop button and 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 stopsKey Switch]combination key switch and emergency stop switch is connected to the power pack through the engine wiring harnessWhen activated, these switches direct the power pack output to ground, stopping the ignition systemclip turns the key from ON to OFF as it is removedIt does not electrically disarm the ignition systemThe key switch, ignition system, and starting circuit are all fully functional after the emergency stop switch clip has been removed 42177