From inside (document excerpt):
STIHL MS 311, 391 Instruction Manual Manual de instrucciones Warning! To reduce the risk of kickback injury use STIHL reduced kickback bar and STIHL RMC3 or RSC3 (3/8 “) chain depending on sprocket pitch or other available low kickback components. Advertencia! Para reducir el riesgo de lesionarse como resultado de un culatazo, utilice la barra de contragolpe reducido y la cadena RMC3 o RSC3 (3/8 pulg) de STIHL, dependiendo de la rueda dentada usada y de otros componentes reductores de contragolpe.
Read and follow all safety precautions in Instruction Manual improper use can cause serious or fatal injury. Lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones el uso incorrecto puede causar lesiones graves o mortales. Instruction Manual 1 – 56 Manual de instrucciones 57 – 116 English Contents Guide to Using this Manual Safety Precautions and Working Techniques Cutting Attachment Mounting the Bar and Chain Tensioning the Chain Checking Chain Tension Fuel Fueling Chain Lubricant Filling Chain Oil Tank Checking Chain Lubrication Chain Brake Winter Operation Starting / Stopping the Engine Operating Instructions Oil Quantity Control Taking Care of the Guide Bar Air Filter System Cleaning the Air Filter Engine Management Adjusting the Carburetor Spark Arresting Screen in Muffler Spark Plug Replacing the Starter Rope and Rewind Spring Storing the Machine Checking and Replacing the Chain Sprocket Maintaining and Sharpening the Saw Chain Maintenance and Care Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement Trademarks 49 51 52 53 53 Allow only persons who fully understand this Manual to operate your chain saw. To receive maximum performance and satisfaction from your STIHL chain saw, it is important that you read and understand and follow the maintenance and safety precautions in chapter “Safety Precautions and Working Techniques ” before using your chain saw. For further information you can go to www.stihlusa.com. Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual. Warning! Because a chain saw is a high-speed wood-cutting tool, some special safety precautions must be observed as with any other power saw to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury. STIHL’s philosophy is to continually improve all of its products. As a result, engineering changes and improvements may be made from time-to-time. If the operating characteristics or the appearance of your chain saw differs from those described in this manual, please contact your STIHL dealer for information and assistance. Original Instruction Manual 53 55 ANDREAS STIHL AG & Co. KG, 2009 0458-542-8621-A. M12-5.L09.CP. 0000001868_004_GB Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled. { MS 311, MS 391 1 English Guide to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual. Symbols in Text Many operating and safety instructions are supported by illustrations. The individual steps or procedures described in the manual may be marked in different ways: N A bullet marks a step or procedure without direct reference to an illustration. Warning! Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury. Caution! Indicates a risk of property damage, including damage to the machine or its individual components. Engineering Improvements STIHL’s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time.