61
use and maintenance
Atlantic 125/250/500 Sprint
To remove and clean the spark plug:
WARNING
Before carrying out the fo llowing
operations, let the engine and the
s i l e n c e r c o o l d o w n t o a m b i e n t
temperature, in order to avoid burns.
u
Disconnect spark plug high tension
cable cap (1).
u
Remove all the dirt from the base of the
spark plug, then unscrew it with the
spanner you will find in the tool kit and
extract it from its seat, taking care that
neither dust nor other substances enter
the cylinder.
u
Make sure that there are neither carbon
deposits, nor corrosion marks on the
electrode and on the central part; if
necessary, clean them with the special
cleaners for spark plugs, with an iron
wire and/or a metal brush.
u
Energetically blow some air, in order to
prevent the removed residues from
getting into the engine. Change the
spark plug if it shows cracks on the
insulating material, corroded electrodes
or excessive deposits.
u
Check the electrode gap with a feeler
gauge. The gap must be
0.7 – 0.8 mm
; if
necessary, adjust it, carefully bending
the earth electrode.
u
Make sure that the washer is in good
condition. Fit the washer and screw the
spark plug finger-tight to avoid damaging
the thread.
u
Tighten using the spanner supplied with
the tool kit. Screw in each spark plug by
one half turn to compress the washer.
Spark plug tightening torque:
12 -14 Nm (1.2 -1.4 kgm).
CAUTION
The spark plug must be tightened
f i r m l y , o t h e r w i s e t h e e n g i n e m a y
overheat and severe damage may
occur.
Use recommended spark plugs only,
see page 75 (TECHNICAL DATA). A
spark plug of the wrong rating may
shorten engine life and cause loss of
performance.
u
Fit the spark plug cap properly, to
prevent it coming off due to engine
vibration.
u
Refit the right inspection
cover, see page 57 (REMOVING THE
R I G H T A N D L E F T I N S P E C T I O N
COVERS).
u
Refit the left inspection cover, see
page 57 (REMOVING THE RIGHT AND
LEFT INSPECTION COVERS).
500
125
250
500
APRum_ATLANT125#02_##uk.book Page 61 Tuesday, March 14, 2006 5:15 PM
