Stihl MS 210 Instruction Manual - Page 38

English felling cut. The chain brake will operate only if it has been properly maintained and the hand guard has not been modified in any way. Check operation of chain brake Winter Operation Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). Accelerate up to full throttle for no more than 3 seconds - the chain must not rotate. The hand guard must be free from dirt and move freely. Chain brake maintenance At temperatures below +50°F (+10°C): 208BA005 KN 135BA029 LÄ The chain brake is subject to normal wear. It is necessary to have it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals: Full-time usage: Part-time usage: Occasional usage: every 3 months every 6 months every 12 months N Squeeze the throttle trigger lockout and move the Master Control lever to l (cold start). N Turn the knob above the rear handle 90° counterclockwise. N Lift off the carburetor box cover vertically. N Lift out the shutter (in front of spark plug) vertically. N Turn the shutter 180°. N Refit the shutter. N Refit the carburetor box cover and secure it with the knob. Heated air is now drawn in from around the cylinder to warm the carburetor - this helps prevent carburetor icing. NOTICE At temperatures above +70 °F (+ 20°C), always close the shutter again. This is necessary to avoid engine running problems and overheating. 36 MS 210, MS 210 C, MS 230, MS 230 C, MS 250, MS 250 C