Stihl MS 180 C-BE Product Instruction Manual - Page 41

Setting the idle speed N Start and warm up the engine N Using the idle speed screw (LD), set the idle speed correctly: The saw chain must not rotate Engine speed too low when idling: N Turn the idle speed adjusting screw (LD) slowly clockwise until the saw chain begins to rotate - then back off 1/2 turn Saw chain rotates at idle speed: N Turn the idle speed adjusting screw (LD) slowly counterclockwise until the saw chain stops rotating - then turn an additional 1/2 turn in the same direction If the saw chain continues to keep rotating in idle even after adjustment, have the chain saw checked by a servicing dealer. Spark Arresting Screen in Muffler In some countries the muffler is equipped with a spark arresting screen. N If the engine is down on power, check the spark arresting screen in the muffler. N Wait for the muffler to cool down. 11 3 2 4 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. Removing the spark plug N Simultaneously press the throttle trigger lockout and throttle trigger and set the Master Control lever to cold start l N Remove the shroud - see "Shroud" 143BA029 KN 143BA043 LÄ N Take out the screws (1) and remove the cover (2). N Remove the spark arresting screen (3) from the muffler (4). N Clean the spark arresting screen. If the screen is damaged or heavily carbonized, fit a new one. N Refit the spark arresting screen - place the cover in position and secure it with the screws. N Pull off the spark plug boot N Unscrew spark plug MS 170, MS 170 C, MS 180, MS 180 C 39