Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 60Get this manual
ENGINE CONTROL SYSTEM
IGNITION SYSTEM
The ignition system used by the DF60DF70 is fully transistorized, electronic microcomputer timing advanced typeThis system is totally battery powered, with the ECM controlling all ignition timing functionsThe ignition system is composed of the ignition coil, spark plug and components for system control (ECM, sensor, switch, etcWhen the ignition switch is "ON", battery voltage (12 V) is applied to the circuit as shown in the illustrationAt the calculated time of ignition, the transistor in the ECM turns "OFF", breaking the grounded circuitIn this way, mutual induction high voltage occurs in the ignition coil secondary side and spark is generatedBattery charge coil ECM main relay Spark timing 30 fuse Ignition coil Ignition switch Battry Terminal voltage (Time) (Voltage) ECM CPU Sensorswitch signal input