Stihl 017 Instruction Manual - Page 42
Adjusting Carburetor, Spark Arresting Screen in, Muffler
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Adjusting Carburetor with one adjusting screw LD LD Spark Arresting Screen in Muffler Carefully screw down the idle speed screw (LD) counterclockwise (left-hand thread) until it is firmly seated. Then back off the screw two full turns clockwise (standard setting LD = 2) • Start and warm up the engine. • Use idle speed screw (LD) to adjust idle speed correctly: chain must not rotate Engine idle speed is too low: • Turn the idle speed screw (LD) clockwise until chain begins to run then back off the screw half a turn. 11 3 2 4 143BA048 KN 143BA029 KN The carburetor is set at the factory to provide an optimum fuel-air mixture under all operating conditions. Adjusting idle speed • Check air filter and fit a new one if necessary. • Check spark arresting screen and clean or replace as necessary. Chain runs when engine is idling: • Turn the idle speed screw (LD) counterclockwise until chain stops running - then turn the screw about another half turn in the same direction. If the engine is low on power, check the spark arresting screen inside the muffler. Take out the screws (1) and remove the shroud (2). Remove the spark arresting screen (3) from the muffler (4). • Clean spark arresting screen if necessary. • If screen is damaged or coked up, fit a new one. • Refit the spark arresting screen, place the shroud in position and secure with the screws. 40 017, 018
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