1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 79Get this manual
ENGINE CONTROL SYSTEM 3-24
OVERHEAT CAUTION SYSTEM
CONDITION (Maximum temperature) Immediate activation of system whenCylinder temperature reaches 121C Exhaust manifold temperature reaches 121C CONDITION (Temprise Vs Time) Immediate activation of system whenThe average temperature difference during three consecutive 10 second measurement periods of the cylinder temperature sensor at engine speeds of 500 rmin or higher exceeds the limits as shown below
Temperature range 6094 95
Temperature difference 1.6 0.9 C