Husqvarna 522L Operation Manual - Page 19
Cooling system, Spark plug, Air filter
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MAINTENANCE Cooling system To keep the working temperature as low as possible the machine is equipped with a cooling system. These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difficulties. If the machine is low on power, difficult to start or runs poorly at idle speed: always check the spark plug first before taking any further action. If the spark plug is dirty, clean it and check that the electrode gap is 0.026 inch (0.65 mm). The spark plug should be replaced after about a month in operation or earlier if necessary. 0,65 CAUTION! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/ cylinder. Check that the spark plug is fitted with a suppressor. Air filter The cooling system consists of: 1 Air intake on the starter. 2 Fins on the flywheel. 3 Cooling fins on the cylinder. 4 Cylinder cover (directs cold air over the cylinder). 5 Muffler guard 6 Muffler plate 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. Spark plug The air filter must be regularly cleaned to remove dust and dirt in order to avoid: • Carburettor malfunctions. • Starting problems. • Loss of engine power. • Unnecessary wear to engine parts • Excessive fuel consumption. 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. Clean the filter every 25 hours, or more regularly if conditions are exceptionally dusty. English - 19