Stihl FS 40 FS 50 Instruction Manual

Pages 96

Year 2020

Language(s)

of 96

Stihl FS 40 FS 50 Specification

The Stihl FS 40 and FS 50 are lightweight, reliable, and efficient grass trimmers designed for homeowners seeking quality performance with ease of use. Both models are equipped with a 27.2 cc engine that delivers robust power for tackling various trimming tasks in residential settings. The FS 40 features a curved shaft design, providing excellent maneuverability and comfort, making it ideal for trimming around obstacles and tight spaces. In contrast, the FS 50 is equipped with a straight shaft, offering extended reach for more challenging terrain and broader cutting areas.

The engines in these models are engineered with Stihl's advanced technology to ensure low emissions, fuel efficiency, and reduced noise levels, promoting a more environmentally friendly operation compared to traditional two-stroke engines. Both trimmers come with a semi-automatic AutoCut C 5-2 cutting head, allowing for easy line advancement during operation. The ergonomic design of the FS 40 and FS 50 includes a multi-function control handle that consolidates all essential controls, enhancing user comfort and safety.

The FS 50 additionally features a simplified starting system, ensuring quick and effortless startup even after extended periods of inactivity. The lightweight construction of both models, combined with their anti-vibration system, minimizes user fatigue during prolonged use. Maintenance is straightforward, with easily accessible components for routine checks and service.

These trimmers are an excellent choice for homeowners seeking a dependable, easy-to-use tool for maintaining their lawns and gardens. With their blend of performance, comfort, and efficiency, the Stihl FS 40 and FS 50 are well-suited to meet the demands of residential trimming tasks, providing reliable service season after season.

Stihl FS 40 FS 50 F.A.Q.

How do I start my Stihl FS 40 or FS 50 trimmer?

To start your Stihl FS 40 or FS 50, ensure the machine is on a flat surface, switch the ignition to "on," set the choke, press the fuel pump bulb, and pull the starter cord firmly until the engine fires.

What type of fuel mix should I use for the Stihl FS 40 and FS 50?

Both the Stihl FS 40 and FS 50 require a gasoline and oil mixture at a ratio of 50:1, using a high-quality 2-stroke engine oil.

How can I troubleshoot if the trimmer does not start?

Check the fuel level, ensure the spark plug is clean and properly connected, verify the air filter is not clogged, and inspect for any fuel line issues.

What maintenance should be performed regularly on the FS 40 and FS 50?

Regular maintenance includes cleaning the air filter, checking the spark plug, inspecting the fuel system, and sharpening the cutting tools.

How do I replace the trimmer line on my Stihl FS 40 or FS 50?

To replace the trimmer line, remove the spool cap, take out the old line, wind the new line following the directional arrows, and reassemble the spool cap.

What should I do if my trimmer vibrates excessively during use?

Excessive vibration may be caused by an unbalanced cutting attachment, loose parts, or engine issues. Check the cutting tool, tighten any loose screws, and inspect the engine mounts.

How do I clean the air filter on the FS 40 and FS 50?

Remove the air filter cover, take out the air filter, wash it with warm soapy water, rinse thoroughly, dry completely, and reassemble.

What can cause the engine to stall during operation?

Engine stalling can be due to a clogged air filter, incorrect fuel mixture, or carburetor issues. Clean the air filter, ensure the correct fuel mix, and check the carburetor settings.

How do I adjust the carburetor on my Stihl FS 40 or FS 50?

Locate the carburetor adjustment screws, typically labeled L (low speed), H (high speed), and T (idle). Adjust these screws according to the manufacturer's specifications for optimal performance.

What type of cutting attachments can be used with the FS 40 and FS 50?

The FS 40 and FS 50 models can use various cutting attachments, including string trimmer heads and metal blades, depending on the task and manufacturer's recommendations.