1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 63Get this manual
ENGINE CONTROL SYSTEM 3-8 CYLINDER TEMPERATURE SENSOR The cylinder temperature sensor is installed on the cylinder (top side) and used to detect the cylinder temperatureThis is thermistor type sensor (resistance of which changes depending on the temperature) and inputs signal to the ECM as voltage valueThis input signal is used to compensate the fuel injection time duration, ignition timing, etcThis sensor is also used to detect engine over-heat as the ECM detects both the temperature and temperature change gradient (temperature rise Vs time)(k)
Resistance
Temperature