Yamaha F115A - Checking the Ignition Spark Gap

8-12
–+
ELEC
E
IGNITION SYSTEM
CHECKING THE IGNITION SPARK GAP8
WARNING
• Do not touch any of the connections of
the spark gap tester lead wires.
• Do not let sparks leak out of the removed
spark plug cap.
• Keep flammable gas or liquids away,
since this test can produce sparks.
Check:
• Ignition spark gap
Above specification → Replace the
spark plug.
Below specification → Check the ECM
output.
Å For USA and Canada
ı For worldwide
Ignition spark gap
1.0 - 1.1 mm (0.039 - 0.043 in)
8130
8140
Å
8150
ı
Checking steps
(1) Remove the spark plugs from the
engine.
(2) Connect a spark plug cap to the spark
gap tester.
(3) Set the spark gap length on the adjust-
ing knob.
(4) Crank the engine and observe the
spark through the discharge window
of the spark gap tester.
Spark gap tester
YM-34487 / 90890-06754
8160
8170