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INSP
ADJ
POWER UNIT
3. Inspect:
• Electrodes 1
Damage/wear → Replace.
• Insulator color 2
Distinctly different color → Check the
engine condition.
Color guide:
Medium to light tan color:
Normal
Whitish color:
Lean fuel mixture
Air leak
Incorrect settings
Blackish color:
Overly rich mixture
Electrical malfunction
Defective spark plug
4. Clean:
• Spark plug
(with a spark plug cleaner or wire brush)
5. Measure:
• Spark plug gap a
Out of specification → Regap.
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
3-22
E
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