1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 120Get this manual
Power Pack rl The power pack has several basic functionsIt stores and received from the charge coil(s)The power pack uses electronic switches (SCR), activated by sensor coil output, to select the correct ignition coil primary winding for firing
liJ distributes the voltage
The power pack has an RPM counting and RPM limiting circuit to protect the engine from damage due to severe overspeeding The power pack incorporates the S.L.OWTM warning system, which limits engine speed to approximately 2500 RPM if engine temperature exceeds 203 (950 C)Once the S.L.DWwarning system has been activated, the engine must cool to 162 (72 C) and the engine must be stopped before normal operation can be resumed('
The power pack incorporates QuikStartTM electronic starting which automatically advances ignition timing when engine temperature is less than 960 (360 C) and for approximately seconds each time the engine is started independent of temperature to ensure reliable startsKey Switch