MAINTENANCE
Carburettor
WARNING! The complete clutch cover
! and shaft must be fitted before the machine is started, otherwise the clutch can come loose and cause personal injury.
Function
•The carburettor governs the engine’s speed via the throttle control. Air and fuel are mixed in the carburettor.
•Setting the carburettor involves adapting the engine to suit local conditions, e.g. climate, altitude and the petrol.
Basic setting
The basic carburettor settings are adjusted during testing at the factory.
CAUTION! For optimum adjustment of the carburettor, contact a qualified dealer/service workshop that has a revolution counter at their disposal.
Adjusting the idle speed (T)
Check that the air filter is clean. When the idle speed is correct, the cutting attachment should not rotate. If adjustment is required, close (turn clockwise) the idle adjustment screw T, with the engine running, until the cutting attachment starts to rotate. Open (turn anticlockwise) the screw until the cutting attachment stops. The idle speed is correctly set when the engine runs smoothly in all positions, and there is a clear margin to the speed at which the cutting attachment starts to rotate.
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.
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 cause fire if directed against dry and combustible material.
The muffler on your machine is equipped with a spark arrestor mesh, this should be cleaned regularly. A blocked mesh will cause the engine to overheat and may lead to serious damage.
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!
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