Coil Removal And Spark Plug Check - Husqvarna TC 449 2011 I.E. Workshop Manual

1
Workshop Manual Ed. 03-2012
GENERAL PROCEDURES
TC 449 2011/2012 I.E.
TE 449 - 511 2011/2012 I.E.
TXC 449 - 511 2011/2012 I.E.
SMR 449 2011 I.E.
SMR 511 2011/2012 I.E.

Coil removal and spark plug check

Spark plug electrodes gap shall be 0.7 - 0.8 mm (0.028
A wider gap may cause difficulties in starting the engine and overload the coil.
A gap that is too narrow may cause difficulties when accelerating, when idling
or poor performance at low speed.
Clean off any dirt around spark plug base before removing the spark plug.
It is very useful to examine the state of the spark plug just after it has been
removed from the engine since the scale deposits on the plug and the colour of
the insulator provide useful indications.
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 deposits.
Low heat rating:
In this case, the spark plug has overheated and insulator tip is vitrified (glazed),
white or grey in colour.
To remove spark plug, proceed as follows:
- remove air filter cover as described in the relevant paragraph;
- disconnect connector (1) on engine left side;
H02463
- on engine right side, undo screw (2) using an 8 mm wrench;
2
H02464
0,7 ÷ 0,8 mm (0,028 ÷ 0,031 in)
E.28
÷ 0.031 in)
.