2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 20Get this manual
IIGeneral information Ignition system
In order to determine the optimal ignition timing that is necessary for the proper operation of the engine, the built-in microcomputer in the COl unit detects the signals from various types of sensors and controls the ignition timing in accordance with control map that is based on those signalsThe microcomputer also effects controls to protect the engine against overheating, over-revolution, and oil pressure drops, as well as to control warning devicesS62Y1310