Checking The Ignition Coil; Checking The Pulser Coil - Yamaha F15B Service Manual

Checking the ignition coil

1. Remove the spark plug cap from the
spark plug.
2. Disconnect the ignition coil lead.
3. Measure the ignition coil resistance.
Replace if out of specification.
å
B
O
∫
Ignition coil resistance:
å Primary coil:
Orange (O) – Black (B)
0.16 – 0.24Ω at 20°C (68°F)
∫ Secondary coil:
Spark plug wire – Spark plug
wire
3.92 – 5.88 kΩ at 20°C (68°F)
6D45F11
Ignition and ignition control system

Checking the pulser coil

1. Connect the digital circuit tester with
peak voltage adaptor B to the connector.
2. Measure the pulser coil output peak volt-
age. If the measurement is below specifi-
cation, check the leads and measure the
pulser coil resistance. Replace the pulser
coil if necessary.
6D480110
6D480120
r/min
DC V
W/G
W/G
Digital circuit tester: 90890-3174
Peak voltage adaptor B:
90890-03172
Pulser coil peak voltage:
White/green (W/G) – Black (B)
Unloaded Loaded
Cranking 1,500
4.0 4.0
1
2
3
4
B
5
B
6D480130
6
7
3,500
9 17
8
9
8-8