Maintenance; Carburettor; Muffler; Cooling System - Husqvarna 143R-II Operator's Manual

Carburettor

Adjusting the idle speed (T)
Check that the air filter is clean. When the idle speed is
correct, the cutting attachment should not rotate. If
adjustment is required, close (turn clockwise) the idle
adjustment screw T, with the engine running, until the
cutting attachment starts to rotate. Open (turn
anticlockwise) the screw until the cutting attachment
stops. The idle speed is correctly set when the engine
runs smoothly in all positions, and there is a clear margin
to the speed at which the cutting attachment starts to
rotate.
Note: The machine should only be run for short periods at
its highest speed.
WARNING! If the idle speed cannot be
!
adjusted so that the cutting attachment
stops, contact your dealer/service
workshop. Do not use the machine until
it has been correctly adjusted or
repaired.
Muffler
CAUTION!
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.

MAINTENANCE

Procedures to be performed after every
100 hours of use
1 Remove the muffler, insert a screwdriver into the vent,
and wipe away any carbon builup. Wipe away any
carbon buildup on the muffler exhaust vent and
cylinder exhaust vent at the same time.
2 Tighten all screws, bolts and fittings.
3 Check to see if any oil or grease has worked its way in
between the clutch lining and drum, and if it has, wipe
it away using oil-free, lead-free gasoline.
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 Cooling fins on the cylinder.
2 Air intake / cooling vent (back)
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.
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English 23