Yamaha F40BMHD Manuel D'entretien page 122

CHK
GENERAL
ADJ
b
a
a
3-23
3. Measure:
• Spark plug gap
Out of specification → Regap.
Spark plug gap
0.9-1.0 mm (0.035-0.039 in)
4. Tighten:
• Spark plug
Spark plug
17.2 Nm (1.7 m
NOTE:
• Before installing the spark plug, clean
the gasket surface and spark plug sur-
face.
Also, it is suggested to apply a thin film
of anti-seize compound to the spark
plug threads to prevent thread seizure.
• If a torque wrench is not available, a
good estimate of the correct tightening
torque is to finger tighten
plug and then tighten it another 1/4 to
b
1/2 of a turn .
E
a
kgf, 13ft lb)
• •
a
the spark