2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 103Get this manual
ENGINE CONTROL SYSTEM
START-IN-GEAR PROTECTION SYSTEM
I Control by Neutral switch switch to detect neutral gear position is located on the throttle lever holder and operated by the clutch control leverThis ONOFF type switch is ON in neutral and OFF in forward or reverseOn starting the engine, the ECM detects the shift position using the neutral switchWhen the neutral switch is OFF, the ECM does not provide starter motor relay operating signalI Control by Shift position sensor shift position sensor is installed on the throttle lever holder and detects the shift positionThis sensor is variable resistor that changes resistance in accordance with the shift positionThe resistance changes (increasedecrease) the voltage signal output from the sensor to the ECMBased on the sensor voltage, the ECM calculates and detects shift positionOn starting the engine, the ECM does not provide an injector operating signal when shift lever in-gear position is detectedOperation by Neutral switch on engine starting Shift position Neutral ForwardReverse OPERATION High pressure Ignition Fuel pump YES YES NO (8-1: YES) NO (8-1: YES)