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 B C D E
x3
•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.
IMPORTANT! If the temperature rises above
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.
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