Yamaha F50F Service Manual page 250

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ELEC
Special service tools .....................................................................................8-1
Checking the electrical components............................................................ 8-2
Measuring the peak voltage ...................................................................... 8-2
Measuring the lower resistance.................................................................8-2
Electrical components................................................................................... 8-3
Port view.................................................................................................... 8-3
Bow view ...................................................................................................8-4
Starboard view........................................................................................... 8-5
Top view .................................................................................................... 8-6
Tiller handle model .................................................................................... 8-7
Ignition and ignition control system ............................................................ 8-8
Checking the ignition spark ....................................................................... 8-8
Checking the spark plug wires...................................................................8-8
Checking the ignition coils ......................................................................... 8-8
Checking the ECM.....................................................................................8-9
Checking the pulser coil ............................................................................8-9
Checking the pulser coil air gap ..............................................................8-10
Checking the sensor assembly................................................................8-10
Checking the oil pressure switch ............................................................. 8-10
Checking the cooling water temperature sensor ..................................... 8-11
Checking the shift position switch............................................................ 8-11
Checking the neutral switch (tiller handle model) .................................... 8-11
Checking the main and fuel pump relay (main control) ........................... 8-11
Checking the engine start switch (tiller handle model) ............................ 8-12
Checking the engine stop lanyard switch (tiller handle model)................ 8-12
Checking the warning indicators (tiller handle model) ............................. 8-13
Fuel control system .....................................................................................8-13
Checking the injectors ............................................................................. 8-13
Checking the electric fuel pump ..............................................................8-13
Checking the main and fuel pump relay (fuel control) ............................. 8-14
Checking the solenoid valve.................................................................... 8-14
Electrical systems
6C13G11