Checking The Ignition Coil; Checking The Cdi Unit - Yamaha F100C Service Manual

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ELEC

Checking the ignition coil

1. Remove the high-tension cords from the
ignition coil.
2. Measure the ignition coil resistance.
Replace if out of specification.
Ignition coil resistance:
Primary coil:
Black/white (B/W) – Black (B)
0.08–0.11 Ω at 20 °C (68 °F)
Secondary coil:
3.5–4.7 kΩ at 20 °C (68 °F)
8-9
Electrical systems
B/W
B
B/W
B
S60C8110

Checking the CDI unit

1. Measure the CDI unit output peak volt-
age. If below specification, measure the
Rectifier Regulator output peak voltage
and pulser coil output peak voltage.
Replace the CDI unit if the output peak
voltage of the Rectifier Regulator and
pulser coil is above specification.
Digital circuit tester: 90890-03174
Peak voltage adaptor: 90890-03172
Test harness (6 pins): 90890-06772
CDI unit output peak voltage:
Black/orange (B/O) – Black (B)
Black/white (B/W) – Black (B)
r/min
Cranking
DC V 124
S60C8120
Loaded
1,500 3,500
125 126
60C5D11