Stihl MM 55 STIHL YARD BOSS174 Product Instruction Manual - Page 24
Maintenance and Care
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English Maintenance and Care The following maintenance intervals apply in normal operating conditions. The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions (extensive dust, etc.). Complete machine visual inspection (condition, leaks) clean X X X Control handle Check operation X X Air filter clean replace Fuel pick-up body in fuel tank Check have them replaced by a specialist dealer1) Fuel tank clean Carburetor Check idle adjustment, the working tool must not turn X X readjust idle speed Spark plug adjust electrode gap replace after every 100 hours of operation Intake port for cooling air Spark arrestor in muffler visual inspection X clean have checked by a specialist dealer 1) X have cleaned or replaced by a specialist dealer 1) All accessible screws, nuts and bolts (not adjusting screws) retighten Safety information sticker replace 1) STIHL recommends STIHL servicing dealers 22 before starting work at the end of work and/or daily whenever tank is refilled weekly monthly yearly if faulty if damaged as required X X X X X X X X X X X X X X X X X MM 55, MM 55 C