Stihl MS 441 C-M MAGNUM174 Product Instruction Manual - Page 54

English The following information applies in normal operating conditions. The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions (extensive dust, highly resinous lumber, lumber from tropical trees, etc.). If the machine is only used occasionally, the intervals can be extended accordingly. Before starting work At the end of work and/or daily Whenever tank is refilled Weekly Monthly Yearly If faulty If damaged As required Air filter Clean Replace X X X Anti-vibration elements Check X Have them replaced by a servicing dealer1) X X Air intake on fan housing Clean X X X Cylinder fins Clean X X X Check idle adjustment - saw chain must not rotate X X Carburetor If the saw chain rotates in idle, have the chain saw serviced by a servicing X dealer1) Spark plug Accessible screws, nuts and bolts Spark arresting screen in muffler Adjust electrode gap Replace after 100 hours of operation Tighten2) Have checked by a specialist dealer1) Have cleaned by a specialist dealer, or replaced if necessary1) X X X X X Check X Chain catcher Replace X Decarbonise after 139 hours of opera- Exhaust bore tion, subsequently after every 150 hours X of operation Safety information label Replace X 1) STIHL recommends STIHL servicing dealers 2) During initial use of chain saws (with a power output of 3.4 kW or more), tighten the cylinder block screws after 10 to 20 hours of operation 52 MS 441 C-M