Spark Plug - Centro 125ie Manual De Uso

5.8 SPARK PLUG

1
Replace every 7,440 mi (12,000 km)
2
• Proper care of the plug is important for maintaining
the engine in perfect working order.
3
• For maintenance, remove the centre partition under
the seat (P-Fig.30
screws (V-Fig.30
4
the aid of a screwdriver) sealed onto the two teeth of
the footboard. Carefully remove the cap by turning it
clockwise and anticlockwise alternatively (C-Fig.31);
5
Now, unscrew the spark plug using the special
wrench supplied with the vehicle (all operations on
the spark plug must be performed when the engine
6
is cold).
• Examine the
reasonably long drive (10-15 km) and after letting
the engine cool down (at least 10-15 minutes), since
the sediments and the colour of the insulator can
provide useful information about the heat rating of
the spark plug, carburetion, lubrication and general
conditions of the engine. A light brown colour of the
insulator, around the central electrode, indicates
ENG
good working order.
• After disassembling the spark plug, suitably clean
the electrodes and the insulator using a metal brush.
gap should range from 0,6 ÷ 0,7 mm.
34
NGK DPR7EA9.
spark plug conditions
• Blow onto it so as to prevent possible residues from
wrench, wrench it to the recommended torque
Spark plugs with a heat rating differing from the
recommended one may seriously damage the
engine.
It is imperative that any spark plug exhibiting
cracks on the insulator or corroded electrodes
be replaced.
after a
P
Fig.30
17.5 Nm / 1.75 kgm.
C
V
Fig.31