Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 323Get this manual
FUEL CONTROL SYSTEM
Measuring steps (1) Connect the test harness (2-pin) as shownTest harness (2-pin) YB-0676890890-06768 (2) Turn the engine start switch to the on position(3) Measure the intake air temperature sensor output voltage
MEASURING THE THROTTLE POSITION SENSOR OUTPUT VOLTAGE