Checking The Ignition Spark Gap; Checking The High-Tension Cords - Yamaha F100C Service Manual

Checking the ignition spark gap

1. Remove the cover and disconnect the
spark plug caps from the spark plugs.
2. Connect a spark plug cap to the special
service tool.
Ignition tester: 90890-06754
3. Set the spark gap length on the adjusting
knob.
Ignition spark gap: 11 mm (0.4 in)
4. Crank the engine and observe the spark
through the discharge window of the
spark gap tester. Check the ignition coil if
out of specification.
60C5D11
Ignition system and ignition control system
WARNING
• Do not touch any of the connections of
the spark gap tester leads.
• Do not let sparks leak out of the
removed spark plug caps.
• Keep flammable gas or liquids away,
since this test can produce sparks.

Checking the high-tension cords

1. Remove the high-tension cords from the
ignition coil.
2. Measure the high-tension cord resis-
tance. Replace if out of specification.
S60C8070
OK
S60C8090
High-tension cord resistance:
#1: 4.5–10.7 kΩ
#2: 3.3–8.0 kΩ
#3: 3.7–8.9 kΩ
#4: 4.3–10.2 kΩ
1
2
3
4
5
S60C8100
6
7
8
9
8-8