Stihl MS 880 R MAGNUM Product Instruction Manual - Page 41

Spark Arresting Screen in Muffler In some countries, the muffler is fitted with a spark arresting screen. N If engine performance deteriorates, check the spark arresting screen in the muffler N Let the muffler cool down Version A N Clean the dirty spark arresting screen, replace if damaged or heavily carbonized N Refit the spark arresting screen in reverse order of steps. Version B 1 1 2 1 1 N Remove screws (1) N Remove exhaust casing (2) of the muffler 216BA003 KN 1 3 1 2 1 1 3 3 N Bend back the retaining lugs (3) N Pull out spark arresting screen (4). 216BA004 KN N Remove screws (1) N Remove the washer (2) N Remove the spark arresting screen (3) N Clean the dirty spark arresting screen, replace if damaged or heavily carbonized N Refit the spark arresting screen in reverse order of steps 171BA018 KN Spark Plug English If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation. Remove the spark plug N Move the Master Control lever to the stop position 0 137BA008 KN N Turn the knob above the rear handle in the direction of the arrow and remove the carburetor box cover MS 880 39