Checking The Stator Coil; Checking The Rectifier Regulator - Yamaha F200C Service Manual

Checking the stator coil

1. Remove the intake silencer and discon-
nect the stator coil coupler.
2. Connect the test harness (3 pins) to the
stator coil.
3. Install the intake silencer.
CAUTION:
Do not start the engine when the intake
silencer is not installed.
4. Measure the stator coil output peak volt-
age. Replace the stator coil if below
specification.
Digital multimeter: YU-34899-A
Peak voltage adaptor: YU-39991
Test harness (3 pins): YB-06770
Stator coil output peak voltage:
Green (G) – Green (G)
Unloaded
r/min
Cranking
DC V 10
Green/white (G/W) – Green/white (G/W)
Unloaded
r/min
Cranking
DC V 9.0
69J1D11
S69J8470
1,500 3,500
42 93
1,500 3,500
34 78
Charging system
Stator coil resistance (use as
reference):
Green (G) – Green (G)
0.28–0.42 Ω at 20 °C (68 °F)
0.24–0.36 Ω at 20 °C (68 °F)
Green/white (G/W) –
Green/white (G/W)
0.24–0.36 Ω at 20 °C (68 °F)
0.20–0.31 Ω at 20 °C (68 °F)

Checking the Rectifier Regulator

1. Remove the intake silencer and discon-
nect the Rectifier Regulator coupler.
2. Connect the test harness (2 pins) to the
Rectifier Regulator.
3. Install the intake silencer.
CAUTION:
Do not start the engine when the intake
silencer is not installed.
4. Measure the Rectifier Regulator output
peak voltage. If below specification, mea-
sure the stator coil output peak voltage.
Replace the Rectifier Regulator if the out-
put peak voltage of the stator coil is
above specification.
B
NOTE:
Disconnect the output lead couplers (blue) of
the Rectifier Regulator when measuring the
output peak voltage.
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9
S69J8480
8-26