Husqvarna FT900 Owners Manual - Page 11

MAINTENANCE Disconnect spark plug wire before performing any maintenance (except carburetor adjustment) to prevent accidental starting of engine. Prevent fires! Keep the engine free of grass, leaves, spilled oil, or fuel. Remove fuel from tank before tipping unit for maintenance. Clean muffler area of all grass, dirt, and debris. Do not touch hot muffler or cylinder fins as contact may cause burns. ENGINE LUBRICATION Use only high quality detergent oil rated with API service classification SG-SL. Select the oil's SAE viscosity grade according to your expected temperature. SAE VISCOSITY GRADES OIL DRAIN PLUG engine_art_12 5W-30 SAE 30 F -20 0 30 32 40 60 80 100 C -30 -20 -10 0 10 20 30 40 TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE Fig. 11 oil_visc_chart1_e NOTE: Although multi-viscosity oils (5W-30, 10W-30, etc.) improve starting in cold weather, these multi-viscosity oils will result in increased oil consumption when used above 32°F (0°C). Check your engine oil level more frequently to avoid possible engine damage from running low on oil. Change the oil after every 50 hours of operation or at least once a year if the tiller is not used for 50 hours in one year. Check the crankcase oil level before starting the engine and after each five (5) hours of continuous use. Add SAE 30 motor oil or equivalent. Tighten oil filler plug securely each time you check the oil level. TO CHANGE ENGINE OIL (See Figs. 11 and 12) Determine temperature range expected before oil change. All oil must meet API service classification SG-SL. • Be sure tiller is on level surface. • Oil will drain more freely when warm. • Catch oil in a suitable container. • Remove drain plug. • Tip tiller forward to drain oil. • After oil has drained completely, replace oil drain plug and tighten securely. • Remove oil filler plug. Be careful not to allow dirt to enter the engine. • Refill engine with oil. See "FILL ENGINE WITH OIL " in the Operation section of this manual. OIL FILLER PLUG OIL LEVEL Fig. 12 AIR CLEANER (See Fig. 13) Service air cleaner cartridge every 50 hours, more often if engine is used in very dusty conditions. • Loosen air cleaner screws, one on each side of cover. • Remove air cleaner cover. • Carefully remove air cleaner cartridge. Be careful. Do not allow dirt or debris to fall into carburetor. • Clean by tapping gently on a flat surface. • If very dirty or damaged, replace cartridge. • Clean and replace cover. Tighten screws securely. CAUTION: Petroleum solvents, such as kerosene, are not to be used to clean cartridge. They may cause deterioration of the cartridge. Do not oil cartridge. Do not use pressurized air to clean or dry cartridge. COVER AIR CLEANER SCREW Fig. 13 AIR CLEANER CARTRIDGE 11