How do you adjust the idle on a MS170 stihl chansaw?

To adjust the idle on a Stihl MS170 chainsaw, locate the idle adjustment screw, typically marked with an "L" or "T" on the carburetor. Start the chainsaw and let it warm up, then use a screwdriver to turn the screw clockwise to raise the idle speed or counterclockwise to lower it. Ensure the chain does not move when the engine is idling; if it does, adjust the screw until the chain remains still. Always follow safety precautions and consult the owner's manual for specific instructions.