3
54
Maintenance
Cleaning and adjusting spark plug
The spark plug is an important engine component.
The condition of the spark plug can indicate
something about the condition of the engine. For
example, if the center electrode porcelain is very
white, this could indicate an intake air leak or
carburetion problem in that cylinder. Do not attempt
to diagnose any problems yourself. Instead,
customer service. You should periodically remove
and inspect the spark plug because heat and
deposits will cause the spark plug to slowly break
down and erode.
1.
Remove the spark plug cap from the spark
plug.
1.
Spark plug cap
2.
Remove the spark plug. If electrode
erosion becomes excessive, or if carbon and other
deposits are excessive, you should replace the
spark plug with another of the correct type.
WARNING! When removing or installing a spark
plug, be careful not to damage the insulator. A
damaged insulator could allow external sparks,
which could lead to explosion or fire.
Standard spark plug: CR6HSB
Be sure to use the specified spark plug,
otherwise the engine may not operate properly.
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
replace it if out of specification.
2
1
1. Spark plug gap
2. Spark plug part number
3. Spark plug l.D
.
mark (NGK)
Spark plug gap:
0.6-0.7
mm
(0.024-0.028
in)
4.
When fitting the plug, wipe off any dirt
from the threads, and then screw it in to the
correct torque.
Spark plug torque:
13.0 Nm (1.33 kgf-m, 9.6 ft-lb)
TIP:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate of the
correct torque is 1/4 to 1/2 a turn past finger-
tight. Have the spark plug adjusted to the correct
torque as soon as possible with a torque- wrench.
Checking fuel filter
The fuel filters are located in the filler hole of
the built-in fuel tank and in the bottom cowling.
Check the fuel filters periodically. If foreign
material is found in the filters, clean or replace
them.
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