Spark Plug Inspection - Yamaha YB50 Service Manual

SPARK PLUG INSPECTION

SPARK PLUG INSPECTION
1. Inspect:
• Incorrect type of spark plug
Standard spark plug (5AD y SA15)
for SA19
2. Inspect:
• Electrode
Worn/Damaged
• Insulator
Abnormal colour
The normal colour is a light to medium
coffee colour.
3. Clean the spark plug with a spark plug cle-
aner or wire brush.
4. Measure:
• Distance between electrodes
Use a thickness gauge.
Outside the specified value
5. Tighten:
• Spark plug
3-8
BR8HS/N.G.K.
BRP4HS/N.G.K.
Replace
Replace
Gap between electrodes
0.6 ~ 0.7 mm
Spark plug
2.0 m • kg
INSP
ADJ
Replace
Correct