Spark Plug - Malaguti centro 125 ie Manuel D'entretien Et D'utilisation

5.8 SPARK PLUG


Replace every 7,440 mi (12,000 km)
Recommended spark plugs: NGK DPR7EA9.
2
The spark plug is an essential component:
• 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), by unscrewing the three fixing
screws (V‑Fig.30) and raising the bottom profile (with
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 (0-5 km) and after letting
the engine cool down (at least 0-5 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.
Adjust the electrode gap using a filler gauge: the
gap should range from 0,6 ÷ 0,7 mm.
34
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spark plug conditions
• Blow onto it so as to prevent possible residues from
entering the engine, then refit it, by wrenching
until finger tight. Then, using the special spark plug
wrench, wrench it to the recommended torque
wrench setting: 17.5 Nm / 1.75 kgm.
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
C
V
Fig.31