MAINTENANCE
MufflerCooling system
NOTE!
To maintain as low opera-
Some mufflers are fitted with a catalytic converter. See
ting temperature as possible
OTechnical data� to see whether your machine is fitted with a
the engine is equipped with
catalytic converter.
a cooling system.
4
The cooling system consists
The muffler is designed to
of:
3
dampen the noise level and
1.An air intake on the
2
to direct the exhaust fumes
starter unit.
away from the user. The
2.Cooling fins on theexhaust fumes are hot and
can contain sparks, whichflywheel.
can result in fire if the1
3.Cooling fins on the
exhaust fumes are directed
cylinder
towards a dry and
4.Cylinder cover (leads cold
inflammable material. Some
air onto the cylinder).
mufflers are equipped with a
special spark arrest screen. IfClean the cooling system using a brush at least once a week, in
your machine is fitted withdifficult conditions more often.
this type of screen it shouldA dirty or blocked cooling system leads to the engine
be cleaned regularly. This isoverheating resulting in damage to the cylinder and piston.
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 aSpark plug
catalytic converter the
screen should be checkedThe condition of the spark
and cleaned monthly. If theplug is affected by:
screen is damaged it should
be replaced. If the screen isY An incorrect carburettor
0,5 mm
frequently blocked, this cansetting.
be a sign that the functionY An incorrect fuel
of the catalytic converter ismixture (too much or
impaired. Contact yourfaulty oil).
dealer to inspect the muffler.Y A dirty air filter.
A blocked screen will cause
the engine to overheatThese factors cause
resulting in damage to thedeposits on the spark plug
cylinder and piston. Also seeelectrode that may result in
under OMaintenance�.malfunction or starting
difficulties.
NOTE!
If the machine is low on power, difficult to start or runs
Never use a machine with a defective muffler.
poorly while idling always check the spark plug first.
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.
WARNING!NOTE! Always use the recommended type of spark plug. An
Mufflers fitted with catalytic converters
incorrect spark plug can damage the cylinder/piston.
!
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 fire!
20 � English |