Ignition Spark Gap; Ignition Coil - Yamaha RS90GTZ Service Manual

IGNITION SYSTEM

IGNITION SPARK GAP

The following procedure applies to all of the
ignition coils.
1. Measure:
• Ignition spark gap
Out of specification → Replace the ignition
coil(s).
Measurement steps:
• Disconnect the ignition coil
plug.
• Connect the oppama pet-4000 spark checker
(ignition checker)
Oppama pet-4000 spark checker:
YM-34487
Ignition checker:
90890-06754
• Measure the ignition spark gap
• Crank the engine by setting the engine stop
switch to "RUN" and turning the main switch
to start and gradually increase the spark gap
until a misfire occurs.
Ignition spark gap:
6.0 mm (0.24 in)

IGNITION COIL

The following procedure applies to all of the
ignition coils.
1. Disconnect:
• Ignition coil coupler
2. Connect:
• Analog pocket tester (pocket tester)
(to the ignition coil)
3. Measure:
• Primary coil resistance
• Secondary coil resistance
Out of specification → Replace the ignition
coil(s).
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)
8-8
ELEC
from the spark
.
.