2 System Overview Start/Stop Panels Normal Start/Stop - Used to Start and Stop the engine under normal operating conditions. Emergency Stop - Used to stop engine under emergency situations. Subthrottle - Used to operate engine throttle if the control system has failed. BY2 Classic Series Engines CP19400: Key Switch Panel BY2 Unlimited Series Engines CP19500: Key Switch Panel (for 1st Station). Lanyard included. 6LY3, 6CX, SY GEN III Series Engines CE40100: Ignition Panel © 2011 Yanmar Marine International • Rev. 2.0 Yanmar Electronic Control Systems Technical Manual 2:5