Husqvarna 128LD Owners Manual - Page 18

MAINTENANCE The owner is responsible for the performance of all required maintenance as defined in the operator's manual. Carburetor Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions. After the engine has used 8--10 tanks of fuel, the engine will be run--in. To ensure that it continues to run at peak performance and to minimize harmful exhaust emissions after the run--in period, ask your servicing dealer to adjust your carburetor. WARNING: The complete clutch, clutch cover, and shaft must be fitted before the machine is started, otherwise parts could come loose and cause personal injury. Function S The carburetor governs the engine's speed via the throttle control. Air and fuel are mixed in the carburetor. S The T--screw regulates the throttle setting at idle speed. If the T--screw is turned clockwise this gives a higher idle speed; turning it counterclockwise gives a lower idle speed. Basic setting S The basic carburetor settings are ad- justed during testing at the factory. Fine adjustment should be carried out by a skilled technician. 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. Idle Speed Screw--T WARNING: If the idle speed can- not be adjusted so that the cutting attachment stops, contact your servicing dealer. Do not use the machine until it has been correctly adjusted or repaired. Unit/Maintenance Safety Disconnect the spark plug before performing maintenance, except carburetor adjustments. Muffler CAUTION! Muffler is fitted with a catalytic converter designed to reduce harmful exhaust gases. CAUTION! If the cutting attachment rotates when the engine is idling the idle adjustment screw T should be turned counterclockwise until the cutting attachment stops. Rec. idle speed: See "Technical data" section. Recommended max. speed: See "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. Fine adjustment of the idle speed--T 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 counterclockwise until the cutting attachment stops. 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. Mufflers are equipped with a special spark arrestor mesh. The mesh should be checked and, if necessary. cleaned by a servicing dealer. If the mesh is damaged, it should be replaced. If the mesh is frequently blocked, this can be a sign that the performance of the catalytic converter is impaired. Contact your servicing dealer to inspect the muffler. A blocked mesh will cause the machine to overheat and result in damage to the cylinder and piston. 115275126 Rev. 1 9/15/09 English--- 18