STIHL FS 38 Gasoline Brush Cutter

1. Introduction

This manual provides essential information for the safe and efficient operation, maintenance, and care of your STIHL FS 38 Gasoline Brush Cutter. Please read this manual thoroughly before initial use and keep it in a safe place for future reference.

Intended Use

The STIHL FS 38 is a small, lightweight gasoline brush cutter designed for trimming lawns and clearing light vegetation around obstacles such as trees, paths, and stairs in private gardens. It is not intended for heavy-duty commercial use or cutting thick brush.

General Safety Information

WARNING: Always wear appropriate safety gear, including eye and ear protection, when operating the tool. Be aware of potential flying debris or cutting hazards, especially when using metal tools. Always follow guidelines for handling and storing fuel for gasoline-powered tools. Failure to follow these instructions may result in serious injury.

2. Product Overview

The STIHL FS 38 is characterized by its compact design and user-friendly features.

• Adjustable loop handle for comfortable operation.
• Lightweight design for easy maneuverability.
• Efficient gasoline engine for reliable performance.
• Suitable for various trimming tasks in home gardens.

Figure 1: The STIHL FS 38 Gasoline Brush Cutter, showcasing its compact design and adjustable loop handle.

3. Setup and Assembly

The STIHL FS 38 requires some assembly before first use. Please follow these steps carefully.

3.1 Unpacking and Inspection

1. Carefully remove all components from the packaging.
2. Inspect all parts for any signs of damage during transit. If any damage is found, do not proceed with assembly and contact your dealer.
3. Ensure all listed components are present.

3.2 Handle Assembly

Attach the adjustable loop handle to the shaft. Ensure it is securely fastened at a comfortable operating position. Refer to the included assembly diagram for precise placement and tightening instructions.

3.3 Guard Installation

Install the cutting attachment guard. This guard is crucial for operator safety and must always be in place during operation. Ensure it is firmly attached according to the instructions.

3.4 Fueling the Brush Cutter

The STIHL FS 38 operates on a gasoline-oil mixture.

• Use only high-quality unleaded gasoline mixed with STIHL 2-stroke engine oil at the recommended ratio (typically 50:1, but always check the product label or a separate fuel mixing guide).
• Mix fuel in a clean, approved fuel container.
• Ensure the engine is cool before refueling.
• Open the fuel cap slowly to release any pressure.
• Fill the tank carefully, avoiding spills. Do not overfill.
• Securely close the fuel cap after refueling.
• WARNING: Fuel is highly flammable. Avoid open flames, sparks, and smoking during refueling. Refuel in a well-ventilated area.

4. Operating Instructions

4.1 Pre-Operation Checks

• Check fuel level.
• Inspect the cutting attachment for damage or wear.
• Ensure all screws and fasteners are tight.
• Verify the cutting guard is correctly installed.
• Wear all required personal protective equipment (PPE).

4.2 Starting the Engine

1. Place the brush cutter on a firm, level surface.
2. Set the master control lever to the cold start position (choke).
3. Press the fuel pump (primer) several times until fuel is visible in the return line.
4. Pull the starter cord firmly until the engine fires briefly.
5. Move the master control lever to the half-throttle position.
6. Pull the starter cord again until the engine starts.
7. Once the engine is running, briefly blip the throttle to disengage the choke and allow the engine to warm up.

4.3 Operating Techniques

• Hold the brush cutter firmly with both hands.
• Maintain a stable stance.
• Keep the cutting attachment away from your body and other people.
• Use a sweeping motion to cut grass and light vegetation.
• Avoid contact with hard objects like stones, fences, or tree trunks.
• Do not operate the brush cutter in wet conditions or on steep slopes where you cannot maintain secure footing.

4.4 Stopping the Engine

To stop the engine, move the master control lever to the "STOP" or "0" position.

5. Maintenance

Regular maintenance ensures the longevity and safe operation of your STIHL FS 38. Always perform maintenance tasks with the engine switched off and cool.

5.1 After Each Use

• Clean the brush cutter, especially the cutting head and air intake.
• Check the cutting attachment for wear or damage. Replace if necessary.
• Inspect the air filter and clean if dirty.
• Check all visible screws and nuts for tightness.

5.2 Periodic Maintenance

• Spark Plug: Inspect and clean the spark plug. Replace if electrodes are worn or fouled.
• Fuel Filter: Check and replace the fuel filter as needed.
• Gearbox Lubrication: Check and replenish gearbox grease if applicable (refer to specific product diagrams).
• General Inspection: Have your brush cutter inspected by an authorized STIHL service dealer annually.

5.3 Storage

• For long-term storage, drain the fuel tank completely or run the engine until it runs out of fuel.
• Clean the entire machine thoroughly.
• Store in a dry, well-ventilated area, out of reach of children and unauthorized persons.
• Ensure the cutting attachment is protected to prevent accidental injury.

6. Troubleshooting

This section addresses common issues you might encounter with your STIHL FS 38.

For problems not listed here or if solutions do not resolve the issue, please contact an authorized STIHL service dealer.

7. Technical Specifications

8. Warranty and Support

For detailed information regarding the product warranty, please refer to the separate warranty document provided with your purchase or visit the official STIHL website.

For technical support, spare parts, or service, please contact your authorized STIHL dealer. A list of authorized dealers can typically be found on the official STIHL website.