Ignition System; Checking The Ignition Spark Gap; Checking The Spark Plug Cap - Yamaha F2.5A Service Manual

Ignition system

Checking the ignition spark gap

1. Disconnect the spark plug cap 1 from
the spark plug.
2. Connect the special service tool to the
spark plug cap and to the ground bolt.
1
Ignition tester: 90890-06754
3. Set the spark gap length on the adjusting
knob.
Ignition spark gap: 7 mm (0.28 in)
4. Crank the engine and observe the spark
through the discharge window of the
spark gap tester. Check the TCI unit or
spark plug cap if out of specification.
69M3E11
Electrical components / Ignition system
8
WARNING
• Do not touch any of the connections of
the spark gap tester leads.
• Keep flammable gas or liquids away,
since this test can produce sparks.
S69M8040

Checking the spark plug cap

1. Remove the spark plug cap from the
spark plug wire by turning the cap coun-
terclockwise.
2. Measure the spark plug cap resistance.
Replace if out of specification.
Ω × 1K
Spark plug cap resistance:
4.0–6.0 kΩ
1
OK
2
S69M8060
3
4
5
6
7
8
9
S69M8080
8-4