IGNITION SYSTEM
8-5
E
–
+
ELEC
CHECKING THE SPARK PLUGS
Refer to "CHECKING THE SPARK
PLUGS" on page 3-22.
CHECKING THE IGNITION SPARK GAP
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
Below specification
→
Check the
ignition system.
Checking steps
(1) Remove the spark plugs from the
engine.
(2) Connect a spark plug cap to the ignition
tester.
(3) Adjust the ignition spark gap to 11 mm
(0.43 in) by turning the adjust knob.
NOTE:
Be careful so that the spark gap does not
come excessively off the measuring posi-
tion [11 mm (0.43 in)].
Standard spark plug
25B:
NGK BR7HS-10
30H:
NGK BR8HS-10
Minimum ignition spark gap
8.0 mm (0.31 in)
Ignition tester
90890-06754
Summary of Contents for 25BMH
Page 48: ...FEATURES AND BENEFITS GEN INFO 1 12 E COOLING SYSTEM Fig 7 ...
Page 49: ...1 12 CARACTERISTIQUES ET AVANTAGES GEN INFO F ...
Page 50: ...1 12 MERKMALE UND VORTEILE GEN INFO D ...
Page 51: ...1 12 CARACTERÍSTICAS Y VENTAJAS GEN INFO ES ...
Page 92: ...MAINTENANCE SPECIFICATIONS SPEC 2 8 E DIMENSIONS ...
Page 156: ...GENERAL CHK ADJ 3 26 E NOTE Grease the inner cable and the lock nut 2 Apply Yamaha grease D ...
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Page 446: ...Printed on recycled paper Printed in Japan Oct 2000 1 9 1 25BMH 30HMH YAMAHA MOTOR CO LTD ...