Cooling System; Spark Plug; Air Filter - Husqvarna 356BTX-series Operator's Manual

Cleaning the drain hose
• Remove the drain hose from the muffler and
expansion pipe.
• Clean the drain hose.
• Connect the drain hose between the expansion pipe
and the muffler.
WARNING! The muffler gets very hot
!
during use and remain so for some time
after stopping. This also applies at idle
speed. Contact can result in burns to the
skin. Remember the risk of fire!

Cooling system

To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
1
1 Air intake on the underside of the blower.
2 Nozzle for cooling the cylinder
3 Cooling fins on the cylinder.
4 Cooling air conductor (directs cold air over the
cylinder).
5 Emergency cooling nozzle
MAINTENANCE
4
2
3
5
Clean the cooling system with a brush once a week, more
often in demanding conditions. A dirty or blocked cooling
system results in the machine overheating which causes
damage to the piston and cylinder. Check that the nozzles
are not blocked.

Spark plug

The spark plug condition is influenced by:
• Incorrect carburettor 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 0,5 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.
Air filter
The air filter must be regularly cleaned to remove dust
and dirt in order to avoid:
• Carburettor malfunctions
• Starting problems
• Loss of engine power
• Unnecessary wear to engine parts.
• Excessive fuel consumption.
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English 17