Malaguti centro 160 ie, User Manual

Page: 132 / 242

2
3
4
6
1
5
34
C
Fig.30
Fig.31
P
V
ENG
5.8 SPARK PLUG
Replace every 7,440 mi (12,000 km)
5HFRPPHQGHG VSDUN SOXJV NGK DPR7EA9 .
7KH VSDUN SOXJ LV DQ HVVHQWLDO FRPSRQHQW
• Proper care of the plug is important for maintaining
the engine in perfect working order.
• For maintenance, remove the centre partition under
the seat ( P-Fig.30 E\ XQVFUHZLQJ WKH WKUHH À[LQJ
screws ( V-Fig.30 DQG UDLVLQJ WKH ERWWRP SURÀOH ZLWK
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 );
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
is cold).
• Examine the spark plug conditions after a
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
good working order.
• After disassembling the spark plug, suitably clean
the electrodes and the insulator using a metal brush.
$GMXVW WKH HOHFWURGH JDS XVLQJ D ÀOOHU JDXJH WKH
gap should range from 0,6 ÷ 0,7 mm.
• Blow onto it so as to prevent possible residues from
HQWHULQJ WKH HQJLQH WKHQ UHÀW LW E\ ZUHQFKLQJ
XQWLO ÀQJHU WLJKW 7KHQ XVLQJ WKH VSHFLDO VSDUN SOXJ
wrench, wrench it to the recommended torque
ZUHQFK VHWWLQJ 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.