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NOTICE
Use of improper spark plugs or improp-
erly tightening spark plugs can cause
severe engine damage.
• Do not experiment with other spark
plug brands unless you can determine
that they are directly equivalent to the
specified brand, or you may experience
engine damage which will not be cov-
ered under warranty. Note that after-
market cross-reference charts may not
be accurate.
• To install a spark plug; seat it as far as
possible by hand, then use a wrench to
tighten it to either the recommended
torque setting or the specified rotation
angle.
Tightening torque
15 – 19 N·m
(1.5 – 1.9 kgf-m, 11 – 14 lbf-ft)
Rotation angle
New plug 1/2 – 3/4 of a turn
Re-use plug 1/12 – 1/8 of a turn
• Do not overtighten or cross-thread a
spark plug, as this will damage the alu-
minum threads of the cylinder head.
To maintain a strong spark, you should clean
and adjust the plug at the interval shown in the
maintenance schedule.
Remove carbon deposits from the spark plug
using a small wire brush or spark plug cleaner,
and adjust the gap as follows:
If the electrode or insulator is damaged, or if
either shows excessive wear, then the spark
plug should be replaced.
Spark plug gap
0.8 – 0.9 mm
(0.031 – 0.035 in.)
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