HYOSUNG MS3 250 Owner's Manual page 74

ting into the engine. Change the spark
plug if it shows cracks on the insulating
material, corroded electrodes or exces-
sive deposits.
5. Check the electrode gap with a thickness
gauge. The gap must be 0.7 ~ 0.8 mm
(0.028 ~ 0.032 in) if necessary, adjust it.
6. Make sure that the washer is in good
condition. Fit the washer and screw the
spark plug finger-tight to avoid damaging
the thread.
7. Tighten using the spanner supplied with
the tool kit. Screw in each spark plug by
one half turn to compress the washer.
TIGHTENING TORQUE
SPARK PLUG 11 N∙m (1.1 kgf∙m)
PLUG REPLACEMENT GUIDE
Hotter type
Standard type
Colder type
0.7~0.8mm
(0.028�0.032 in)
CR7E
CR8E
CR9E
The spark plug must be tightened
firmly, otherwise the engine may over-
heat and severe damage may occur.
Use recommended spark plugs only.
A spark plug of the wrong rating may
shorten engine life and cause loss of
performance.
8. Fit the spark plug cap properly, to pre-
vent it coming off due to engine vibration.
9 Refit the inspection cover.
73
CAUTION