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MAINTENANCE
Spark plug
The spark plug condition is influenced by:
• Incorrect carburetor adjustment.
• An incorrect fuel mixture (too much or incorrect type of
oil).
• A dirty air filter.
These factors cause deposits on the spark plug electrodes,
which may result in operating problems and starting
difficulties.
If the machine is low on power, difficult to start or runs poorly
at idle speed: always check the spark plug first before taking
any further action. If the spark plug is dirty, clean it and check
that the electrode gap is 0.020 inch (0.5 mm). The spark plug
should be replaced after about a month in operation or earlier
if necessary.
CAUTION! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/cylinder.
Check that the spark plug is fitted with a suppressor.
Winter use
Running problems can occur when using the machine in the
cold and snowy conditions caused by:
• Too low engine temperature.
• Icing of the air filter and carburetor.
Special measures are therefore often required:
• Partly mask the air inlet on the starter to increase the
working temperature of the engine.
• Preheat the intake air to the carburettor by utilising the
heat from the engine.
There is a special winter kit available when using the machine
in cold and/or snowy conditions, this includes the following:
• a special air filter cover without air intake (A)
• a cover for the filter holder (B)
• a cover for the starter housing (C)
• a special wear guard with an air duct (D) that routes the
hot air from the muffler to the carburettor
• a special air filter with a coarser mesh size (E)
Temperature 0°°
°°
C (32°°
°°
F) or colder:
Fit the covers for the starter housing and air filter holder using
the three screws provided as shown in the figure.
Remove the air filter and air filter cover from the machine. Fit
the air filter and air filter cover supplied with the winter kit.
Temperature -5°°
°°
C (23°°
°°
F) or colder:
Dismantle the machine’s wear guard, and fit the wear guard
from the winter kit as shown in the figure. Pay particular
attention that the opening on the air duct is positioned in the
centre of the hole in the air filter holder.
x3
ABC D
E
IMPORTANT! If the temperature rises above -5°C (23°F) or
0
°C (32°F) respectively the machine MUST be restored to
its normal set-up. Otherwise there is a risk of overheating,
which can cause severe engine damage.
IMPORTANT! Any maintenance other than that described
in this manual must be carried out by your servicing dealer
(retailer).
IMPORTANT! Use only HUSQVARNA replacement parts.
Use of other brands of replacement parts can cause
damage to your unit or injury to the operator or others. Your
warranty does not cover damage or liability caused by the
use of accessories and/or attachments not specifically
recommended by HUSQVARNA.