Yamaha YW50P Service Manual page 49

SPARK PLUG INSPECTION I INSP
SPARK PLUG I N S P E C T I O N
1. Remove:
• Battery box cover
2. Inspect:
• Spark plug type
I nco rrect-->Replace.
I Standard spark plug: I
BPR7HS/NGK
3. Inspect:
• Electrode (~
Wea r/Da m ag e-->Re place.
• Insulator (~)
A b n o r m a l color->Replace.
Normal color is a medium-to-light tan
color.
4. Clean the spark plug w i t h a spark plug
cleaner or wire brush.
5. Measure:
• Plug gap (~
Use a wire gauge or feeler gauge.
Out of specification-->Regap.
I l'0ar'0u00ao I
0.6 ~ 0.7 m m (0.02 ~ 0.03 in)
6. Tighten:
• Spark plug I~4~i 20Nm(2"0m'kg'14ft'lb) I
7. Install:
• Battery box cover.
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