Muffler - Husqvarna 535FBX Operator's Manual

5 Feel with your finger if the carburettor throttle cam (A)
can be pressed up further. If it can, the throttle wire
should be adjusted.
6 To adjust, turn the adjustment screw (B) clockwise
and try point 5 again until the carburettor throttle cam
bottoms at maximum throttle setting.
7 Fit the cylinder cover and check the idle speed. The
cutting attachment must not rotate att idle. If it does,
turn back the the adjustment screw (anti-clockwise)
until the cutting attachment does not rotate.
Muffler
CAUTION! Some mufflers are fitted with a catalytic
converter. See chapter on Technical data to see whether
your machine is fitted with a catalytic converter.
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
28 – English
MAINTENANCE
cause fire if directed against dry and combustible
material.
Some mufflers are equipped with a special spark arrestor
mesh. If your machine has this type of muffler, you should
clean the mesh at least once a week. This is best done
with a wire brush.
On mufflers without a catalytic converter the mesh should
be cleaned weekly, or replaced if necessary. On mufflers
fitted with a catalytic converter the mesh should be
checked, and if necessary cleaned, monthly. If the mesh
is damaged it should be replaced.
If the mesh is frequently blocked, this can be a sign that
the performance of the catalytic converter is impaired.
Contact your dealer to inspect the muffler. A blocked
mesh will cause the machine to overheat and result in
damage to the cylinder and piston. See also instructions
under the heading Maintenance.
CAUTION! Never use a machine with a defective muffler.
!
WARNING! Mufflers fitted with catalytic
converters get 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!