3-18
INSP
ADJ
E
PERIODIC SERVICE
D35000-0*
SPARK PLUG
1. Check the electrode
1
condition and
state of wear, note the insulator
2
color
and the electrode gap.
Normal condition is a medium to light
tan color.
Distinctly different color
→
Check the
engine condition.
Whitish color
: Lean fuel mixture
●
Plugged filter, jet
●
Air leak
●
Wrong settings
Blackish color : Electrical malfunction
●
Defective spark plug
●
Defective ignition system
●
Rich mixture
●
Excessive idling
2. Clean the spark plug with spark-plug
cleaner or wire brush. Use a wire gauge
to adjust the plug gap
a
to specifica-
tion.
Spark plug gap:
0.9 ~ 1.0 mm (0.035 ~ 0.039 in)
3. If the electrode becomes too worn,
replace the spark plug.
4. When installing the spark plug, clean
the gasket surface, wipe off any grime
there may be on the surface of the spark
plug, and screw in the spark plug to the
correct torque.
NOTE:
Screw spark plug in finger-tight
a
, then
torque spark plug to specification
b
.
Standard spark plug:
NGK B7HS-10
NGK BR7HS-10
(Noise suppressor type)
T
R
.
.
Tightening torque:
20 Nm (2.0 m • kgf, 14 ft • lb)
