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

Loosen the muffler's 2 screws and remove the muffler.
Pull out the spark arrestor screen and clean using a wire
brush. Replace the spark arrestor screen if it is defective.
CAUTION! Never use a machine with a defective muffler.
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!
MAINTENANCE

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 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
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 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
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