2-11
INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
3. Gently pull the recoil starter to bring the
piston to top dead center of its compres-
sion stroke (when the screwdriver
inserted into the spark plug hole reaches
the highest position).
NOTE:
If the piston is at top dead center of the
exhaust stroke, turn the crankshaft one full
turn (360
°
) to set the piston at top dead center
of the compression stroke.
SWL2140J
4. Measure:
• Valve clearance
Out of specification
→
Adjust.
NOTE:
Valve clearance must be measured when the
engine is cool to the touch.
Intake valve (cold):
0.18 ~ 0.22 mm (0.007 ~ 0.009 in)
Exhaust valve (cold):
0.18 ~ 0.22 mm (0.007 ~ 0.009 in)
Thickness gauge:
YU-26900-9, 90890-03079
SWL2150J
