Tanaka TBC-255SFK Owner's Manual - Page 17

6. MAINTENANCE Brush Cutter Fuel Filter Drain all fuel from fuel tank and pull fuel filter line from tank. Pull filter element out of holder assembly. Replace filter if it appears to be discolored or hardened from use. The filter has a white, felt-like appearance when new. Spark Plug The spark plug condition is influenced by: • An incorrect carburetor setting. • Wrong fuel mixture (too much oil in the gasoline) • A dirty air filter. • Difficult running conditions (such as cold weather). These factors cause deposits on the spark plug electrodes, which may result in malfunc¬tion and starting difficulties. If the engine is low on power, difficult to start or runs poorly at idling speed, always check the spark plug first. If the spark plug is dirty, clean it and check the electrode gap. Readjust if necessary. The correct gap is 0.6 mm. The spark plug should be replaced after about 100 operation hours or earlier if the electrode is badly eroded. NOTE! In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this machine was originally equipped with resistor spark plug, use the same type of spark plug for replacement. EN Muffler Remove the muffler and clean any excess carbon from the exhaust port or muffler inlet every 100 hours of operation. Cylinder (Engine cooling) The engine is air cooled, and air must circulate freely around engine and over cooling fins on cylinder head to prevent overheating. Every 100 Operating hours, or once a year (more often if conditions require), clean fins and external surfaces of engine of dust, dirt and oil deposits which can contribute to improper cooling. NOTE! Do not operate engine with engine shroud or muffler guard removed as this will cause overheating and engine damage. Angle transmission (brushcutter and edger only) Check the gear case grease level about every 50 hours of operation by removing the grease filler plug on the side of the case. If no grease can be seen on the flanks of the gears, fill the transmission with a quality lithium based multipurpose grease up to 3/4. Do not completely fill the transmission. TBC-255SFK 17 Owner's Manual