Yamaha F20A, Service Manual

Page: 84 / 444

3-11
INSP
ADJ
E
GENERAL
3. Measure:
●
Spark plug gap
a
Out of specification
→
Regap.
Spark plug gap:
0.9 ~ 1.0 mm (0.035 ~ 0.039 in)
4. Tighten:
●
Spark plugs
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
a
the spark plug and
then tighten it another 1/4 to 1/2 of a
turn
b
.
●
Always use a new spark plug gasket.
T
R
.
.
Spark plug:
17.2 Nm (1.7 m • kg, 12.6 ft • lb)
Lubrication points
1. Apply:
●
Water resistant grease