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From inside (document excerpt):
STIHL BT 121 Instruction Manual Manual de instrucciones Warning! Read and follow all safety precautions in Instruction Manual improper use can cause serious or fatal injury. Advertencia! Lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones el uso incorrecto puede causar lesiones graves o mortales. English / USA Contents Allow only persons who understand this manual to operate your earth auger. To receive maximum performance and satisfaction from your STIHL earth auger, it is important that you read and understand the maintenance and safety precautions, starting on page 3, before using your earth auger.
Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual. Guide to Using this Manual 2 Safety Precautions and Working Techniques . 3 Assembling the Machine 11 Adjusting the Throttle Cable . 11 Fuel 12 Fueling 13 Auger Brake . 14 Fitting the Auger . 15 Starting / Stopping the Engine 15 Operating Instructions 18 Releasing a Trapped Auger 19 Cleaning the Air Filter . 19 Motor Management 19 Adjusting the Carburetor 20 Checking the Spark Plug 21 Engine Running Behavior . 22 Lubricating the Gearbox . 22 Replacing Starter Rope and Rewind Spring . 23 Storing the Machine 25 Maintenance Chart . 26 Main Parts and Controls . 27 Specifications . 28 Maintenance and Repairs . 30 STIHL Incorporated Federal Emission Control Warranty Statement 31 Printed on chlorine-free paper. Printing inks contain vegetable oils; paper can be recycled. BA_SE_175_008_01_03.fm !Warning! Because an earth auger is a hightorque, gasoline-powered tool, some special safety precautions must be observed to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury. ANDREAS STIHL AG & Co. KG, 2006 0458 428 8621 A. M1. L6. T. Printed in Germany STIHl BT 121 1 English / USA Guide to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual. The operating and handling instructions are supported by illustrations. In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols described below: Warning where there is a risk of an accident or personal injury or serious damage to property. Caution where there is a risk of damaging the machine or its individual components. Note or hint which is not essential for using the machine, but may improve the operator’s understanding of the situation and result in better use of the machine. Note or hint on correct procedure in order to avoid damage to the environment. Equipment and features This instruction manual may refer to several models with different features. Components that are not installed on all models and related applications are marked with an asterisk (*). Such components may be available as special accessories from your STIHL dealer. Symbols in text The individual steps or procedures described in the manual may be marked in different ways: : A bullet marks a step or procedure without direct reference to an illustration. 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. If the operating characteristics or the appearance of your machine differ from those described in this manual, please contact your STIHL dealer for assistance. Therefore some changes, modifications and improvements may not be covered in this manual. A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. Example: Loosen the screw (1) Lever (2). 2 BT 121 English / USA Safety Precautions and Working Techniques Warning! Because an earth auger is a high-torque, gasolinepowered tool, some special safety precautions must be observed to reduce the risk of personal injury.