Remove the ignition cable and the spark plug to carry out
inspection and maintenance. Keep all parts of your body
away from hot surfaces.
Adjustment of the idle speed
Before any adjustments are made, make sure that the air
ﬁlter is clean and the air ﬁlter cover is ﬁtted.
The factory idle speed setting is 2,000 rpm. Use the
adjustment screw at the upper edge of the carburettor if
the idle speed has to be adjusted.
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
The mufﬂer is equipped with a special spark arrestor
screen. The spark arrestor screen should be cleaned
once a month. This is best done with a wire brush.
To remove the spark arrestor screen proceed as follows:
Remove the exhaust duct (4, 5).
Remove the spark arrester (3).
Pull out the spark arrestor screen and clean using a
wire brush. Replace the spark arrestor screen if it is
1158220-49 Rev. 1 2016-04-08
CAUTION! Never use a machine with a defective mufﬂer.
Check regularly that the mufﬂer is complete and secured
correctly. (1), (2) Tighten the screws. 8-10Nm
Check that the spark arrester and the exhaust duct are
screwed in place correctly (5). Tighten to 2-3 Nm.
WARNING! The mufﬂer gets 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!
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
Cooling ﬁns on the cylinder.
Air intake screen
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. Check that the nozzles
are not blocked.