Yamaha CE50T Service Manual page 156

LECI ]
I G N I T I O N S Y S T E M
TROUBLESHOOTING CHART
IF IGNITION SYSTEM SHOULD BECOME IN-
OPERATIVE (NO SPARK OR INTERMITTENT
SPARK).
Spark plug inspection:
1. Remove spark plug.
2. Clean spark plug with spark plug cleaner
if necessary.
3. Inspect:
• Electrode
• Insulator
oPlug gap
Refer to "CHAPTER 2 -- SPARK PLUG
INSPECTION" section.
Plug Gap:
0.9-1.0 mm (0:035-0.039 in)
Ignition spark test:
1. Install spark plug to plug cap.
2. Ground spark plug to air shroud.
3. Start starter motor.
No good
~"
j Replace or regap spark plug.
v
Spark
~>1 Ignition circuit is good. I
Ignition spark gap test:
1. Remove spark plug and plug cap.
2. Hold spark plug lead 5 mm (0.20 in) from
air shroud.
3. Start starter motor.
S.ark
I
Replace spark plug and/or plug I
I
cap.
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