Husqvarna 325EX SERIES, Руководство оператора

Страница: 18 / 24

18
– English
MAINTENANCE
Muf fl er with catalytic converter
A muf fl er fi tted with a catalytic converter reduces the extent of
the following substances in the exhaust fumes:
• Hydrocarbons (HC). Some hydrocarbons in gasoline and the
exhaust are carcinogenic.
• Nitric oxides (NO). Irritating for the breathing air-ways.
• Aldehydes. The most common formaldehyde, is carcinogenic
and causes hypersensitiveness.
NOTE! The level of carbon monoxide is not reduced. This is an
odourless and extremely poisonous substance. Therefore avoid
exposure without good air circulation.
The muf fl er is designed to
dampen the noise level and to
direct the exhaust fumes away
from the user. The exhaust
fumes are hot and can contain
sparks, which can result in
fi re
if the exhaust fumes are di-
rected towards a dry or in
fl am-
mable material. Some muf fl ers
are fi tted with a special spark
arrest screen. If your machine
is
fi tted with this type of muf-
fl er then the screen should be
cleaned at least once a week.
This is done using a wire
brush. If the screen is dam-
aged in anyway it should be re-
placed. If the screen is blocked
this will result in the engine
over heating and damage to the
cylinder and piston,
NOTE!
Never use a machine with a
defective muf
fl er.
!
WARNING!
The coating on/in the catalytic element can
be hazardous to health if consumed. Wear
protective gloves when carrying out service
work on the catalytic converter.
WARNING!
Muf
fl ers fi tted with catalytic converters
become extremely hot during use and after
stopping. This also applies at idling speeds.
Contact can result in burns to the skin. Be
observant to the risk of
fi re!
!
Cooling system
To maintain as low an
operating temperature as
possible the engine is
equipped with a cooling
system.
The cooling system consists of:
1. An air intake on the starter
unit.
2. Cooling fi ns on the
fl ywheel.
3. Cooling fi ns on the cylinder
4. Cylinder cover (leads cold
air onto the cylinder).
Clean the cooling system using
a brush at least once a week,
in dif
fi cult conditions more
often.
A dirty or blocked cooling
system leads to the engine
overheating resulting in
damage to the cylinder and
piston.
Spark plug
The condition of the spark plug
is affected by:
• An incorrect carburettor
setting.
• An incorrect fuel mixture (too
much or faulty oil).
• A dirty air fi lter.
These factors cause deposits
on the spark plug electrode
that may result in malfunction
or starting dif
fi culties.
0,5 mm
If the machine is low on power, dif fi cult to start or runs
poorly while idling always check the spark plug fi rst before
taking any other action.
If the spark plug is dirty, clean it and at the same time check that
the electrode gap is 0.5 mm. The spark plug should be changed
after about one month of operation or earlier if necessary.
NOTE! Always use the recommended type of spark plug. An
incorrect spark plug can damage the cylinder/piston.