Adjustment of the idle speed
Use suitable personal protective equipment. During
adjustment the cutting attachment could rotate.
Before any adjustments are made, make sure that the air
ﬁlter is clean and the air ﬁlter cover is ﬁtted.
Adjust the idle speed using the idle adjustment screw T, if
it is necessary to readjust. First turn the idle adjustment
screw T clockwise until the cutting attachment starts to
rotate. Then turn the screw anticlockwise until the cutting
attachment stops. The idle speed is correctly adjusted
when the engine will run smoothly in every position. The
idle speed should also be well below the speed at which
the cutting attachment starts to rotate.
Rec. idle speed: See the Technical data section.
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.
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
16 – English
cause ﬁre if directed against dry and combustible
Some mufﬂers are equipped with a special spark arrestor
screen. If your machine has this type of mufﬂer, you
should clean the screen at least once a week. This is best
done with a wire brush. On mufﬂers without a catalytic
converter the screen should be cleaned weekly, or
replaced if necessary. On mufﬂers ﬁtted with a catalytic
converter the screen should be checked, and if necessary
cleaned, monthly. If the screen is damaged it should be
replaced. If the screen 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 screen will cause the machine to overheat and
result in damage to the cylinder and piston.
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!