Ignition Spark Gap; Ignition Coil - Yamaha RS90K Service Manual

È
É
IGNITION SYSTEM

IGNITION SPARK GAP

1. Remove:

• Ignition coil

2. Measure:
• Ignition spark gap
Out of specification → Replace the ignition
coil.
Measurement steps:
• Disconnect the ignition coil 1 from the spark
plug.
• Connect the dynamic spark tester 2 or ignition
checker 3.
Dynamic spark tester:
YM-34487
Ignition checker:
90890-06754
• Set the main switch to "ON".
• Measure the ignition spark gap a.
• Crank the engine by pushing the start switch
and gradually increase the spark gap until a
misfire occurs.
Ignition spark gap:
6.0 mm (0.24 in)
È For USA/Canada
É For Europe
IGNITION COIL
1. Disconnect:
• Ignition coil lead
2. Connect:
• Pocket tester
3. Measure:
• Primary coil resistance a
• Secondary coil resistance b
Out of specification → Replace.
Primary coil resistance:
1.19 ~ 1.61 Ω at 20 °C (68 °F)
Secondary coil resistance:
8.5 ~ 11.5 kΩ at 20 °C (68 °F)
8-6
– +
ELEC