Checking The Spark Plug Caps; Checking The Ignition Coil - Yamaha F50A Service Manual

Checking the spark plug caps

1. Remove the spark plug caps from the
high-tension cords by turning the caps
counterclockwise.
2. Measure the spark plug cap resistance.
Replace if out of specification.
Spark plug cap resistance: 3.75–6.25 kΩ

Checking the ignition coil

1. Remove the spark plug caps from the
high-tension cords by turning the caps
counterclockwise.
2. Measure the ignition coil resistance.
Replace if out of specification.
62Y3A11
Ignition system and Ignition control system
Ignition coil resistance:
Primary coil:
Orange (O) – Black (B)
0.08–0.11 Ω at 20 °C (68 °F)
Secondary coil:
High-tension cord – High-tension cord
3.5–4.7 kΩ at 20 °C (68 °F)
1
2
3
4
5
6
7
8
I
8-14