Troubleshooting - Yamaha LB50IIAC Service Manual

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EB802010
TROUBLESHOOTING
IF THE IGNITION SYSTEM FAILS TO OPERATE (NO SPARK OR INTERMITTENT SPARK):
Procedure
Check:
1.Spark plug
2.lgnition spark gap
3.Spark plug cap resistance
4.lgnition coil resistance
NOTE:
Use the following special tool(s) for trouble-
shooting.
EB802013
Ignition checker:
90890-06754
Pocket tester:
90890-03112
1.Spark plug
• Check the spark plug condition.
• Check the spark plug type.
• Check the spark plug gap.
Refer to "SPARK PLUG INSPECTION" in
CHAPTER 2.
EBB02014
Spark plug gap:
0.5
N
0.6
mm
~
CORRECT
2.lgnition spark gap
• Disconnect the spark plug cap from the
spark plug.
• Connect the ignition checker G) as
shown.
®
Spark plug cap
• Turn the main switch to "ON".
-135-
5.Main switch
6.Pickup coil resistance
7.Source coil resistance
8.Wiring connection
(the entire ignition system)
Standard spark plug:
B6HS/NGK
INCORRECT
I
Repair or replace the spark plug.
2

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Lb80iiac

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