Power Unit; Spark Plug Inspection - Yamaha WaveRunner GP1300R Wartungshandbuch

INSP
ADJ

POWER UNIT

POWER UNIT

Spark plug inspection

1. Check:
• Electrodes 1
Damage/wear → Replace.
• Insulator color 2
Distinctly different color → Check the
condition of the engine.
Color guide:
Medium-to-light tan color:
Normal
Whitish color:
Lean air-fuel mixture
Air leakage
Incorrect settings
Blackish color:
Overly rich air-fuel mixture
Electrical malfunction
Excessive oil use
Defective spark plug
2. Clean:
• Spark plug
(using a spark plug cleaner or wire
brush)
3. Measure:
• Spark plug gap a
Out of specification → Regap.
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
3-9
E