Yamaha F150B Service Manual page 125

Checking the Rectifier Regulator ............................................. 5-27
Ignition units and components
Checking the ignition spark ..................................................... 5-28
Checking the spark plug wire .................................................. 5-28
Checking the ignition coil ......................................................... 5-29
Checking the pulser coil .......................................................... 5-30
Checking the air temperature sensor ...................................... 5-31
Checking the air pressure sensor ............................................ 5-32
Checking the engine temperature sensor ............................... 5-33
Checking the thermoswitch ..................................................... 5-34
Checking the shift cut switch ................................................... 5-36
Checking the neutral switch .................................................... 5-37
Checking the engine shut-off switch ........................................ 5-37
Starting units and components
Checking the starter relay ....................................................... 5-38
Checking the engine start switch ............................................. 5-39
Checking the neutral switch (remote control) .......................... 5-39
Starter motor
............................................................................ 5-40
Removing the starter motor ..................................................... 5-42
Checking the starter motor operation ...................................... 5-42
Checking the magnet switch ................................................... 5-42
Checking the starter motor pinion ........................................... 5-42
Disassembling the starter motor .............................................. 5-43
Checking the starter motor ...................................................... 5-44
Checking the brush ................................................................. 5-45
Assembling the starter motor .................................................. 5-45
Installing the starter motor ....................................................... 5-47
PTT system
............................................................................... 5-48
Checking the PTT relay ........................................................... 5-48
Checking the PTT switch (on bottom cowling) ........................ 5-49
Checking the trim sensor ......................................................... 5-50
........................................... 5-28
........................................... 5-38
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