Poulan PR46BT Owner Manual - Page 17
Maintenance - carburetor adjustment
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MAINTENANCE General Remove the ignition cable and the spark plug to carry out inspection and maintenance. Keep all parts of your body away from hot surfaces. Carburetor 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: 2500 rpm Use the adjustment screw at the upper edge of the carburettor if the idle speed has to be adjusted. Muffler 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 screen. NOTE: THE SPARK ARRESTOR SCREEN ON THIS UNIT IS NOT SERVICEABLE. As your unit is used, carbon deposits build up on the muffler and spark arresting screen. For normal homeowner use, however, the muffler and spark arresting screen will not require any service. After 50 hours of use, we recommend that your muffler be serviced or replaced by your authorized service dealer. CAUTION! Never use a machine with a defective muffler. Check regularly that the muffler is complete and secured correctly. Cooling system 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. Air intake screen Check that the air intake is not blocked on all sides including the underside, for example, by leaves or rubbish. A clogged air intake reduces the machine's blowing capacity and increases the engine's working temperature, which can result in engine failure. Stop the engine and remove the object. WARNING! Never use the blower if the ! screen is not in place. Before use, check that the screen is in place and undamaged. Spark plug Make sure that the spark arrester and the exhaust duct are screwed in place correctly. 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! The spark plug condition is influenced by: • Incorrect carburetor adjustment. • An incorrect fuel mixture (too much or incorrect type of oil). • A dirty air filter. These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difficulties. English - 17