Yamaha PW50W 2007 Service Manual page 52

1
a
CHECKING THE SPARK PLUG
4. Check:
9 Electrode 1
Damage/wear → Replace the spark plug.
9 Insulator 2
Abnormal color → Replace the spark
2
plug.
Normal color is medium-to-light tan.
5. Clean:
9 Spark plug
(with a spark plug cleaner or wire brush)
6. Measure:
9 Spark plug gap a
(with a wire thickness gauge)
Out of specification → Regap.
7. Install:
9 Spark plug
NOTE:
Before installing the spark plug, clean the
spark plug and gasket surface.
8. Connect:
9 Spark plug cap
3-20
CHK
ADJ
Spark plug gap
0.6-0.7 mm (0.024-0.028 in)
20 Nm (2.0 m•kg, 14 ft•lb)