Stihl FS 38 Instruction Manual

Pages 92

Year 2018

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of 92

Stihl FS 38 Specification

The Stihl FS 38 is a lightweight, petrol-powered grass trimmer designed for residential use, offering a balance of efficiency and ease of operation. It is equipped with a 27.2 cc, two-stroke engine that delivers reliable performance for trimming tasks around the garden or lawn. The engine is designed to meet stringent emissions standards, making it environmentally friendly while still providing sufficient power.

This trimmer features a curved shaft design, enhancing maneuverability and allowing users to access hard-to-reach areas with ease. The cutting head is equipped with a standard nylon line, capable of handling light to moderate vegetation. The FS 38's AutoCut C 5-2 cutting head allows for easy line replacement, ensuring minimal downtime during operation.

Ergonomically, the FS 38 is designed for user comfort, featuring an adjustable loop handle that can be customized to suit the operator's height and preference, reducing strain during extended use. Its lightweight construction, weighing approximately 4.2 kg, further contributes to ease of handling and reduces user fatigue.

The trimmer includes a simplified starting system with Stihl's ElastoStart technology, which helps reduce shock during startup, making it easier to get the engine running. The fuel tank capacity of approximately 0.33 liters provides adequate runtime for residential tasks without frequent refueling.

Overall, the Stihl FS 38 is a practical choice for homeowners seeking a reliable and efficient tool for garden maintenance. Its combination of lightweight design, user-friendly features, and dependable performance makes it suitable for tackling a variety of trimming tasks with ease.

Stihl FS 38 F.A.Q.

How do I start the Stihl FS 38 trimmer?

To start the Stihl FS 38, ensure it is on a flat surface. Move the stop switch to the "on" position, set the choke lever to "cold start," and press the fuel pump bulb until fuel is visible. Pull the starter rope until the engine fires, then move the choke to "run" and pull again to start.

What is the correct fuel mixture for the Stihl FS 38?

The Stihl FS 38 requires a fuel mixture of 50:1, which is equivalent to 2.6 ounces of high-quality 2-stroke engine oil per gallon of gasoline.

How do I replace the trimmer line on the Stihl FS 38?

First, remove the spool by pressing the tabs on the trimmer head. Cut two 10-foot lengths of line and insert them into the spool's holes. Wind the lines evenly in the direction of the arrows, then secure them in the notches. Reattach the spool and pull the lines through the eyelets.

Why does the Stihl FS 38 stall when idling?

Stalling at idle can be caused by incorrect carburetor settings, a clogged air filter, or old fuel. Clean or replace the air filter, ensure fresh fuel is used, and consider adjusting the carburetor settings as per the manual.

How often should I clean the air filter on the Stihl FS 38?

The air filter should be checked after every 5 hours of operation and cleaned or replaced if necessary. Regular maintenance ensures optimal performance and longevity of the engine.

What steps should I follow to store the Stihl FS 38 for winter?

To winterize the Stihl FS 38, empty the fuel tank and run the engine until it stops. Clean the unit thoroughly, inspect for damaged parts, and store it in a dry, dust-free location. Consider removing the spark plug and adding a few drops of oil to the cylinder to prevent rust.

How do I adjust the carburetor on the Stihl FS 38?

To adjust the carburetor, locate the "L" (low speed), "H" (high speed), and "LA" (idle) screws. Adjust the "L" screw for smooth acceleration, "H" for top RPMs, and "LA" to set idle speed. Make incremental adjustments and test after each change. Refer to the manual for specific guidelines.

What should I do if the trimmer head of the Stihl FS 38 doesn’t spin?

If the trimmer head doesn't spin, check for line tangling, debris blockage, or a worn-out drive shaft. Ensure the drive shaft is engaged properly and that the trimmer head is securely attached. Clean and inspect the components for damage.

How can I prevent overheating in my Stihl FS 38?

Prevent overheating by ensuring the engine cooling fins and air vents are clean and free from debris. Use the correct fuel mixture, and avoid running the trimmer at full throttle for extended periods. Regular maintenance checks help in preventing overheating issues.

What should I check if the Stihl FS 38 is difficult to start?

If the trimmer is difficult to start, check the spark plug for fouling or damage, ensure fresh fuel is used, and inspect the air filter for clogs. Verify that the choke and throttle settings are correct. Regular maintenance helps prevent starting issues.