Stihl FS 111 FS 111 R Instruction Manual

Pages 124

Year 2020

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Stihl FS 111 FS 111 R Specification

The Stihl FS 111 and FS 111 R are robust, professional-grade trimmers designed for demanding tasks. Both models are equipped with a powerful 31.4 cc 4-MIX® engine, which combines the benefits of a two-stroke and four-stroke engine to deliver high torque, reduced emissions, and improved fuel efficiency. The engine offers a power output of 1.05 kW, providing sufficient capability for tough vegetation management.

The FS 111 features a straight shaft design, while the FS 111 R has a loop handle for enhanced maneuverability, making it ideal for work in confined spaces or around obstacles. Both models are equipped with a simplified starting procedure, incorporating a decompression valve, semi-automatic choke lever, and Stihl's proprietary Easy2Start™ system, which significantly reduces the effort required to start the engine.

The trimmers come with a multi-function control handle, allowing the operator to access all controls with one hand, enhancing operational efficiency and safety. The ergonomic design is complemented by an adjustable shoulder strap and a bike handle on the FS 111, designed to distribute weight evenly for prolonged use without fatigue.

Both models feature a robust gearbox with a longer lasting lifespan and a large fuel tank with a capacity of 710 ml, enabling extended operation between refueling. The cutting heads are compatible with various Stihl trimmer heads and metal blades, providing versatility across different trimming and clearing tasks. With their durable construction and advanced engine technology, the Stihl FS 111 and FS 111 R are reliable tools for professional landscapers and heavy-duty users seeking performance and efficiency.

Stihl FS 111 FS 111 R F.A.Q.

How do I start the Stihl FS 111 R?

To start the Stihl FS 111 R, ensure the stop switch is in the run position. Press the primer bulb several times until fuel is visible. Set the choke lever to the closed position for cold starts. Pull the starter rope until the engine fires, then move the choke to the open position and continue pulling until the engine runs.

What type of fuel mixture is required for the FS 111 R?

The Stihl FS 111 R requires a fuel mixture of 50:1, which means 50 parts gasoline to 1 part 2-stroke engine oil. It is recommended to use a high-quality 2-stroke oil to ensure optimal performance and longevity.

How do I replace the trimmer line on the FS 111?

To replace the trimmer line, first turn off the engine and disconnect the spark plug wire for safety. Remove the trimmer head by pressing the tabs on the side and pulling it off. Insert the new line into the holes on the spool and wind it evenly. Reattach the trimmer head and ensure it is secure.

What maintenance should be performed regularly on the FS 111 R?

Regular maintenance for the FS 111 R includes cleaning the air filter, checking and replacing the spark plug if necessary, inspecting the fuel system for leaks, and lubricating the gearbox. It's also important to regularly inspect the cutting head and replace any worn parts.

How do I troubleshoot if the FS 111 R won't start?

If the FS 111 R won't start, check the fuel mixture to ensure it is correct. Inspect the spark plug for fouling or damage and replace if necessary. Clean the air filter if it's dirty. Ensure the stop switch is in the run position and the choke is set correctly for the starting conditions.

How do I adjust the idle speed on the FS 111?

To adjust the idle speed on the FS 111, locate the idle speed screw on the carburetor. Turn the screw clockwise to increase the idle speed or counterclockwise to decrease it. Adjust until the engine idles smoothly without the cutting attachment moving.

Why does the FS 111 R vibrate excessively during use?

Excessive vibration on the FS 111 R can be caused by an unbalanced cutting attachment, loose parts, or worn engine mounts. Check the cutting attachment for damage or imbalance, tighten any loose screws or bolts, and inspect the engine mounts for wear or damage.

What safety precautions should I take when using the FS 111?

When using the FS 111, always wear appropriate personal protective equipment, including safety glasses, gloves, hearing protection, and sturdy footwear. Be aware of your surroundings and avoid using the trimmer near bystanders, pets, or obstacles that could cause injury.

How do I clean the air filter on the FS 111 R?

To clean the air filter on the FS 111 R, remove the air filter cover and take out the filter. Wash it in warm, soapy water and let it dry completely. If the filter is damaged or excessively dirty, replace it with a new one. Reinstall the filter and cover securely.

What should I do if the FS 111 stalls during operation?

If the FS 111 stalls during operation, check the fuel tank to ensure there is adequate fuel. Inspect the air filter for dirt or blockage. Examine the spark plug for fouling or wear and replace if necessary. Adjust the carburetor settings if needed to ensure proper fuel flow.