Yamaha F6AMH Service Manual page 138

GENERAL
4. Measure:
Spark plug gap


Out of specification
Spark plug gap:
0.9 - 1.0 mm (0.035 - 0.039 in)
5. Tighten:
Spark plug


Spark plug:
25 N m (2.5 kgf


NOTE:
Before installing the spark plug, clean the


gasket surface and spark plug surface.
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
then tighten it another 1/4 to 1/2 of a turn
b
.
3-24
a
Replace.

m, 18.4 ft lb)



a
the spark plug and