Stihl BT 120 C Instruction Manual

Stihl BT 120 C manual cover
Pages 66
Year 2003
Language(s)
English en
Spanish sp

Stihl BT 120 C Specification

The Stihl BT 120 C is a robust and efficient earth auger designed for precision and reliability in drilling applications. Engineered for both professional and occasional use, this model is equipped with a powerful 1.3 kW single-cylinder, two-stroke engine that ensures optimal performance and longevity. The engine displacement is 30.8 cc, providing ample power for a variety of soil conditions and enabling efficient operation even in challenging terrains.

The BT 120 C features an advanced vibration reduction system, enhancing user comfort by minimizing fatigue during prolonged use. Its ergonomic handle design further contributes to ease of operation, offering a firm grip and precise control. The auger is equipped with a high-torque gear reduction, optimizing drilling efficiency and allowing for larger diameter holes to be drilled with minimal effort.

The QuickStop drill brake is a notable safety feature, instantly halting the auger if the bit jams, thereby preventing potential injury. This model also includes a multi-function handle, consolidating control elements into a single, easily accessible location, enhancing operational safety and convenience.

The BT 120 C supports a range of auger bits, providing versatility for different drilling tasks, whether for fence posts, tree planting, or soil sampling. Its compact and portable design makes it easy to transport between job sites while maintaining durability and reliability in diverse working conditions. Fuel efficiency is another key highlight, with a well-designed carburetor system that optimizes fuel consumption, reducing operational costs and environmental impact.

Overall, the Stihl BT 120 C is a high-performance earth auger that combines power, safety, and user-friendly features, making it an ideal choice for professionals seeking quality and reliability in their drilling equipment.

Stihl BT 120 C F.A.Q.

How do I start the Stihl BT 120 C auger?

To start the Stihl BT 120 C, ensure the machine is on a flat surface. Set the choke lever to 'start', press the decompression valve, and firmly hold the handle. Pull the starter rope until you hear the engine fire, then move the choke to the 'run' position and pull again to start.

What maintenance is required for the Stihl BT 120 C?

Regular maintenance for the Stihl BT 120 C includes checking the air filter, spark plug, and fuel filter. Clean or replace these components as needed. Additionally, lubricate the gear head and inspect the auger bit for wear.

How can I troubleshoot if the engine doesn't start?

If the engine doesn't start, check the fuel level and quality, inspect the spark plug for fouling, and ensure the air filter is clean. Verify the choke and throttle settings are correct. If issues persist, it may require professional servicing.

What fuel mix should be used with the Stihl BT 120 C?

The Stihl BT 120 C requires a fuel mix of 50:1 ratio of gasoline to oil. Use high-quality, 89-octane unleaded gasoline mixed with Stihl 2-cycle engine oil for optimal performance.

How do I properly store the Stihl BT 120 C after use?

To store the Stihl BT 120 C, clean the equipment thoroughly, empty the fuel tank, and run the engine until it stops to clear residues. Store in a dry place with the spark plug removed and a few drops of oil in the cylinder.

What are common signs of carburetor issues in the Stihl BT 120 C?

Common carburetor issues include difficulty starting, poor acceleration, and irregular idling. If you notice these signs, check for dirt or blockages in the carburetor and clean it if necessary.

How can I prevent the Stihl BT 120 C from overheating?

To prevent overheating, ensure the cooling fins are clean and unobstructed. Use the correct fuel mixture, avoid overloading the engine, and allow it to cool down periodically during extended use.

What should I do if the auger bit does not rotate?

If the auger bit doesn't rotate, check for obstructions in the bit or around the clutch area. Ensure the clutch and drive shaft are not worn out and inspect the gear housing for damage.

How often should the spark plug be replaced?

The spark plug should be checked every 25 hours of operation and replaced every 100 hours or when it shows signs of wear like excessive carbon build-up or a damaged electrode.

Can I use ethanol-blended fuel in my Stihl BT 120 C?

While the Stihl BT 120 C can run on fuel with up to 10% ethanol, it's recommended to use ethanol-free fuel to reduce potential issues like carburetor gumming or fuel line degradation.