Stihl BR 550 Product Instruction Manual - Page 30

English Maintenance and Care The following intervals apply to normal operating conditions only. If your daily working time is longer or operating conditions are difficult (very dusty work area, etc.), shorten the specified intervals accordingly. before starting work after finishing work or daily after each refueling stop weekly monthly every 12 months if problem if damaged if required Complete machine Visual inspection (condition, leaks) Clean X X X Control handle Check operation X X Air filter Filter in fuel tank Clean Replace Have checked by dealer1) Have filter replaced by dealer1) X X X X X Fuel tank Clean X Check idle adjustment X X Carburetor Readjust idle X Readjust electrode gap X Spark plug Replace after every 100 operating hours Cooling inlets Visual inspection Clean X X Valve clearance Check and adjust if necessary after 139 hours of operation X Combustion chamber Decoke after first 139 hours of operating, then every 150 hours X Sparl arresting screen2) in muffler Check Clean or replace X X All accessible screws and nuts (not adjusting screws) Retighten X Antivibration elements Check X Have replaced by dealer1) X X 28 BR 500, BR 550, BR 600