Stihl SR 420 Instruction Manual - Page 20

Starting / Stopping the Engine 1 English / USA 373BA010 KN 373BA008 KN 373BA011 KN 2 373BA009 KN : Observe safety precautions - see chapter on "Safety Precautions and Working Techniques". : Slide the stop switch (1) to # : Move the setting lever (2) to the center position - this is the starting throttle position Before starting : Move stop cock lever (3) to upright position. : If the engine is cold, turn the choke knob to g : If the engine is warm, turn the choke lever to e Also use this position if the engine has been running but is still cold. The setting lever can be used to select any throttle opening between idle speed (lower stop) and full throttle (upper stop). Set the lever to the idle position before switching off the engine. SR 340, SR 420 19