Fuxtec FX-4MS131
FUXTEC FX-4MS131 Petrol Brush Cutter User Manual
Model: FX-4MS131
Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your FUXTEC FX-4MS131 Petrol Brush Cutter. Please read this manual thoroughly before initial use and keep it for future reference. The FUXTEC FX-4MS131 is a powerful 4-stroke grass trimmer designed for efficient lawn edge trimming, grass cutting, and clearing of tough brushwood.
Important Safety Warnings
Always use appropriate protective equipment, including safety glasses, hearing protection, and gloves, during operation. Keep children and pets away from the working area. Do not leave the engine running unattended. In case of any defect or damage, cease operation immediately and arrange for repair by qualified personnel. Use the brush cutter only for its intended purpose.
Setup and Initial Preparation
Before operating your FUXTEC FX-4MS131, proper assembly and preparation are crucial for safety and performance. While assembly is generally straightforward, referring to the included diagrams and instructions is recommended.
Assembly
Assemble the handle, shaft, and cutting head according to the detailed instructions provided in the separate assembly guide. Ensure all connections are secure and fasteners are tightened appropriately. The ergonomic two-hand grip should be positioned for comfortable and balanced operation.

Image: The FUXTEC FX-4MS131 Petrol Brush Cutter, illustrating its main components and ergonomic design.
Fuel and Oil Filling
The FX-4MS131 features a 4-stroke engine. Fill the fuel tank with unleaded petrol (E10 compatible). For engine oil, use SAE 10W30. It is critical to check the engine oil level before each use, as some units may be delivered without pre-filled engine oil. Failure to do so can lead to severe engine damage.
Before starting, prime the carburetor by pressing the fuel pump bulb 3-4 times until fuel is visible. This ensures proper fuel delivery to the engine.

Image: Visual representation of the 1 HP engine power, indicating robust performance.
Operation
Operating the FUXTEC FX-4MS131 is designed for ease and efficiency. Always ensure you are wearing appropriate personal protective equipment (PPE) before starting.
Starting the Engine
- Place the brush cutter on a flat, stable surface.
- Ensure the emergency stop switch is in the 'ON' position.
- Engage the choke (if cold start).
- Pull the starter rope firmly and smoothly until the engine starts. The 'Easy-Start' system facilitates quick starting, often within 2-3 pulls.
- Once started, disengage the choke gradually as the engine warms up.

Image: The 'Easy Starter' feature, designed for quick and effortless engine ignition.
Using the Brush Cutter
The brush cutter features a stepless speed controller for precise power adjustment. The professional comfort carrying strap ensures comfortable handling and reduces fatigue during extended use. The versatile design allows for both line trimming and blade cutting.
- Line Head (Tippautomatik): Ideal for trimming lawn edges and lighter grass. The line automatically extends by tapping the head on the ground while the engine is running.
- 3-Tooth Blade: Suitable for thicker grass, weeds, and light brushwood. Ensure the blade is securely attached before use.

Image: The engine and control unit, showing the ergonomic handle and speed control for comfortable operation.

Image: Illustration of the 320 mm cutting width, indicating the effective area of operation.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your FUXTEC FX-4MS131. Always disconnect the spark plug cap before performing any maintenance.
Routine Checks
- Air Filter: Clean or replace the air filter regularly, especially in dusty conditions.
- Spark Plug: Inspect and clean the spark plug periodically. Replace if worn. The CDI ignition system is designed to be maintenance-free.
- Cutting Attachments: Inspect the line head and blade for wear or damage. Replace worn line and sharpen or replace dull blades.
- Fuel System: Check fuel lines and connections for leaks or damage.
- Drive Shaft: The multiple-bearing drive shaft is designed for durability, but ensure it is free from obstructions.
Cleaning and Storage
After each use, clean the brush cutter thoroughly, removing grass clippings and debris. Store the unit in a dry, well-ventilated area, away from direct sunlight and extreme temperatures. Ensure the fuel tank is empty if storing for extended periods.
Troubleshooting
This section addresses common issues you might encounter with your FUXTEC FX-4MS131.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine does not start or is difficult to start. | No fuel, incorrect choke setting, fouled spark plug, no engine oil. | Check fuel level. Adjust choke. Clean/replace spark plug. Verify engine oil level before starting. |
| Fuel leaks from the tank. | Damaged fuel tank or loose connection. | Inspect the tank and connections for cracks or looseness. Contact FUXTEC support for a replacement tank if damaged. |
| Nylon line does not feed properly. | Line tangled, insufficient line, or mechanism issue. | Ensure line is correctly spooled. Replace line if too short. Check for debris in the feed mechanism. |
| Excessive vibration during operation. | Unbalanced cutting attachment, loose components. | Check if the blade or line head is properly installed and balanced. Tighten any loose bolts or screws. |
Technical Specifications
Detailed specifications for the FUXTEC FX-4MS131 Petrol Brush Cutter:
| Feature | Value |
|---|---|
| Model Number | FX-4MS131 |
| Engine Type | 4-Stroke |
| Displacement | 31 ccm |
| Power Output | 1 HP (0.8 kW) |
| Cutting Width | 320 mm |
| Weight | 10 Kilograms (approx. 7.5 kg dry weight) |
| Dimensions (L x W x H) | 110 x 31.5 x 28 cm |
| Drive Type | Gas-powered |
| Max Speed | 9000 RPM |
| Handle Type | Ergonomic Two-Hand Grip |

Image: A visual summary of the FUXTEC FX-4MS131's key technical data.
Support and Service
FUXTEC is committed to providing excellent customer support. For technical assistance, spare parts, or service inquiries, please contact our support team.
- Technical Hotline & Customer Service: Available for all your product-related questions.
- Spare Parts: Long-term availability of spare parts is ensured.
- Workshop in Germany: FUXTEC operates a workshop in Germany for service and repairs.
For more information, visit the official FUXTEC store or contact your local dealer.

Image: Overview of FUXTEC's comprehensive support services.
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