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14 – English
MAINTENANCE
Carburettor
Your Husqvarna product has been designed and
manufactured to specifications that reduce harmful
emissions. After the engine has used 8-10 tanks of fuel the
engine will be run-in. To ensure that it continues to run at peak
performance and to minimise harmful exhaust emissions after
the running-in period, ask your dealer/service workshop (who
will have a rev counter at their disposal) to adjust your
carburettor.
Function
The carburettor governs the engine’s speed via the throttle
control. Air and fuel are mixed in the carburettor. The air/fuel
mixture is adjustable. Correct adjustment is essential to get
the best performance from the machine.
Adjusting the carburettor means that the engine is adapted to
local operating conditions, e.g. climate, altitude, petrol and the
type of 2-stroke oil.
Fine adjustment of the idle speed T
Adjust the idle speed using the idle adjustment screw T, if it is
necessary to readjust.
The T-screw regulates the throttle setting at idle speed. If the
T-screw is turned clockwise this gives a higher idle speed;
turning it anti-clockwise gives a lower idle speed. The idle
speed is correctly adjusted when the engine will run smoothly
in every position.
Rec. idle speed See the Technical data section.
Muffler
The muffler is designed to reduce the noise level and to direct
the exhaust gases away from the operator. The exhaust gases
are hot and can contain sparks, which may cause fire if
directed against dry and combustible material.
Some mufflers are equipped with a special spark arrest
screen. If your machine is fitted with this type of screen it
should be cleaned regularly. This is done using a wire brush.
On mufflers without a catalytic converter the screen should be
cleaned weekly, or replaced if necessary. On mufflers fitted
with a catalytic converter the screen should be checked and
cleaned monthly. If the screen is damaged it should be
replaced. If the screen is frequently blocked, this can be a
sign that the function of the catalytic converter is impaired.
CAUTION! Never use a machine with a defective muffler.
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 starter.
2 Fins on the flywheel.
3 Cooling fins on the cylinder.
4 Cylinder cover (directs cold air over the cylinder).
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.
!
WARNING! The machine may only be started
in its complete design. If the machine is
started without all the guards fitted there is a
risk of personal injuries.