Assessments - 3, GPA: 4
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Facilidade de uso
Basic setting • The carburettor is set to its basic setting when test run at the factory. The basic setting is richer than the optimal setting and should be kept during the machine’s first working hours. Thereafter the carburettor should be finely adjusted. Fine adjustment should be carried out by a skilled technician. NOTE! If the cutting attachment rotates/moves while the engine is idling the T-screw should be turned anti-clockwise until the cutting attachment stops. Recommended idling speed is: 2 700 rpm. Recommended max. speed: See “Technical data”. ! ! WARNING! If the idling speed cannot be adjusted so that the cutting attachment stops, contact your service workshop. Do not use the machine until it has been correctly adjusted or repaired. Adjusting the idle speed, T Adjust the idle speed with screw T, if it is necessary to readjust. First turn the idle speed adjusting screw T clockwise until the cutting attachment begins to move. Then turn the screw anticlockwise until the cutting attachment stops. The idle speed is correctly adjusted when the engine runs smoothly in any position. There should also be a good margin to the engine speed at which the cutting attachment begins to move. T CAUTION! Contact your servicing dealer, if the idle speed setting cannot be adjusted so that the cutting attachment stops. Do not use the machine until it has been properly adjusted or repaired. Correctly adjusted carburettor A correctly adjusted carburettor means that the machine accelerates without hesitation and the machine 4-cycles a little at max. speed. Furthermore, the cutting attachment must not move at idling. If the setting of the low speed needle L is too lean it may cause starting difficulties and poor acceleration. If the setting of the high speed needle H is too lean it causes lower power = less capacity, poor acceleration and/or damage to the engine. An excessively rich adjustment of the two speed needles L and H gives acceleration problems or too low working speed. English – 13 MAINTENANCE Muffler NOTE! Some mufflers are fitted with catalytic converters. See “Technical data” to find out if your machine is equipped with a catalytic converter. The muffler is designed to dampen the noise level and to direct the exhaust fumes away from the user. The exhaust fumes are hot and can contain sparks, which can result in fire if the exhaust fumes are directed towards a dry and inflammable material. Some mufflers are equipped with a special spark arrest screen. If your machine is fitted with this type of screen it should be cleaned regularly. This is 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 a catalytic converter the screen should be checked and cleaned monthly. If the screen is damaged it should be replaced. If the screen is frequently blocked, this can be a sign that the function of the catalytic converter is impaired. Contact your dealer to inspect the muffler. A blocked screen will cause the engine to overheat resulting in damage to the cylinder and piston. Also see under “Maintenance”. NOTE! Never use a machine with a defective muffler. ! ! WARNING! Mufflers fitted with catalytic converters 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! Cooling system To maintain as low operating temperature as possible the engine is equipped with a cooling system. The cooling system consists of: 1. An air intake on the starter unit. 2. Cooling fins on the flywheel. 3. Cooling fins on the cylinder 4. Cylinder cover (leads cold air onto the cylinder). Clean the cooling system using a brush at least once a week, in difficult conditions more often. A dirty or blocked cooling system leads to the engine overheating resulting in damage to the cylinder and piston. 1 4 2 3 14 – English English – 15 Spark plug The condition of the spark plug is affected by: • An incorrect carburettor setting. • An incorrect fuel mixture (too much or faulty oil). • A dirty air filter. These factors cause deposits on the spark plug electrode that may result in malfunction or starting difficulties. If the machine is low on power, difficult to start or runs poorly while idling always check the spark plug first before taking other action. The spark plug is accessed from under the cylinder cover, which is removed by loosening the four bolts (A). 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. NOTE! Always use the recommended type of spark plug. An incorrect spark plug can damage the cylinder/piston. Air filter The air filter (A) should be cleaned regularly removing dust and dirt to avoid: • carburettor malfunction • starting problems • reduced engine power • unnecessary wear to engine parts • abnor...