74
NOTICE
Use of improper spark plugs or improperly
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 dam-
age which will not be covered under war-
ranty. Note that aftermarket cross-reference
charts may not be accurate.
• To install a spark plug; seat it as far as pos-
sible by hand, then use a wrench to tighten
it to either the recommended torque setting
or the specified rotation angle.
Tightening torque
25 – 29 N·m
(2.5 – 3.0 kgf-m, 18 – 21 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 aluminum
threads of the cylinder head.
To maintain a strong spark, you should clean
and adjust the plugs at the intervals shown in
the maintenance chart. Remove carbon depos-
its from the spark plugs using a small wire
brush or spark plug cleaner, and adjust the gap
according to the following chart:
1. Excessive wear 2. Breakage 3. Melting
4. Erosion 5. Yellow deposits 6. Oxidation
NOTE:
If the spark plug condition is found as shown in
the illustration above, ensure it is replaced with
new one. Otherwise, it will cause difficulty in
starting the engine, increase fuel consumption,
and result in engine troubles.
Spark plug gap
0.7 – 0.8 mm
(0.028 – 0.031 in)
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