2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 21Get this manual
Technical tips Pulser coil The pulser coil transmits the pulser signals, which are generated in the pulser coil in accordance with the rotation of the flywheel, to the COl unitAmong the two protrusions that are provided for generating signals, one is used for cylinders #1 and #4, and the other for cylinders #2 and #3, thus enabling the pulser coil to simultaneously ignite two cylindersTo provide ignition signals to the cylinders, the microcomputer determines the ignition cylinder and ignition timingThese are based on the cylinder identification signals generated by the protrusion for identifying cylinders, and on the pulser signals generated by the protrusions for generating ignition signals