Spark Plug Inspection - Yamaha YW50AP Service Manual

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SPARK PLUG INSPECTION

SPARK PLUG INSPECTION
1. Remove:
2. Inspect:
3. Inspect:
4. Clean the spark plug with a spark plug
2
5. Measure:
6. Tighten:
7. Install:
3-9
8 Battery box cover
8 Spark plug type
Incorrect→Replace.
Standard spark plug:
BPR7HS/NGK
8 Electrode 1
Wear/Damage→Replace.
8 Insulator 2
Abnormal color→Replace.
Normal color is a medium-to-light tan
color.
cleaner or wire brush.
8 Plug gap a
Use a wire gauge or feeler gauge.
Out of specification→Regap.
Spark plug gap:
0.6 ~ 0.7 mm (0.02 ~ 0.03 in)
8 Spark plug
8 Battery box cover.
INSP
ADJ
20 Nm (2.0 m.kg,14 ft.lb)