Voltage Regulator - Husqvarna SMR 450-R 2009 Manual De Uso Y Mantenimiento

SPARK PLUG CHECK
Use NGK CR9EKB spark plug (2); the gap is 0,0315 in.
A wider gap may cause difficulties in starting engine and in
overloading coil.
A gap that is too narrow may cause difficulties when accelerat-
ing, when idling the engine or when performing at low
speeds.
Clean the dirt away from the base of the spark plug before re-
moving it from the cylinder after removing the cap (1).
It is very useful to examine the state of the spark plug just after
it has been removed from the engine since the deposits on the
plug and the colour of the insulator provide useful indications.
1
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Correct heat rating:
The tip of the insulator should be dry and the colour should be
light brown or grey.
High heat rating:
In this case, the insulator tip is dry and covered with dark de-
posits.
Low heat rating:
In this case, the spark plug is overheated and insulator tip is
vitreous, white or grey in colour.
CAUTION*: Select a spark plug with a "col-
der" or "hotter" heat range carefully and
cautiously. A spark plug with too hot a heat
range may lead to preignition and possible
engine damage. A spark plug with too cold
a heat range may foul as the result of too
much carbon buildup.
2
Before refitting the plug, thoroughly clean
the electrodes and the insulator using a
brass-metal brush.
Apply a little graphite grease to the spark
plug thread; fit and screw the spark plug by
hand then tighten to the torque of 10÷12
Nm. Loosen the spark plug then tighten it
again to the torque of 10÷12 Nm.
Spark plugs which have cracked insulators
or corroded electrodes should be replaced.

VOLTAGE REGULATOR

The voltage regulator (3) is fitted to the right side of the chas-
sis, on the front.
3