1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 116Get this manual
Power Pack
m The powervoltagereceived frombasiccharge coilsThe power pack has several functionsIt stores and distributes the the
pack uses electronic switches, activated by the timing sensor, to select the correct ignition coil primary windingThe power pack has an RPM limiting circuit which helps protect against powerhead damage due to overrevingOverreving can result from: Installing the motor too high Carrying less weight than the motor is propped for Using propeller that is too small, has very worn blades, or ventilates excessivelyThe power pack incorporates the S.L.OWwarning system, which gradually limits engine speed to approximately 2500 RPM if the engine temperature switch closesOnce the S.L.oWwarning system has activated, the engine must cool to allow the temperature switch to openThe engine must be shut off before normal operation can be resumedThe power pack incorporates QuikStart electronic starting, which automatically advances the ignition timing when the engine temperature is less than 1050 (41 C), and for approximately 10 seconds each time the engine is started, to ensure reliable startsStop Button[The stop buttonis connected to the power pack through the engine wiring harnessWhen activated, these switches direct the power pack output to ground, stopping the ignition system