Introduction
The Einhell GC-BC 52 I AS Thermal Brush Cutter is a powerful tool designed for effortlessly clearing tall and dense grass in hard-to-reach areas of your garden. Its high-quality, low-vibration 2-stroke engine with a double-bearing crankshaft delivers the necessary power. The digital ignition ensures rapid and dynamic fuel intake and stable engine operation. All controls are easily accessible on the adjustable aluminum universal handlebar, allowing for comfortable and precise tool guidance.
For efficient cutting, the GC-BC 52 I AS can be equipped with either a blade or a line. It comes supplied with a 3-tooth blade and a twin-line spool with automatic feed. The long aluminum shaft and adjustable handle ensure fatigue-free and precise operation. The 'Quick-Start' system, featuring an easily accessible primer and automatic choke, enables quick and simple starting. Safety during operation is ensured by a centrifugal clutch, which disengages the cutting tool when the engine is idling. For practical use, a comfortable harness is included. Thanks to its separable shaft, the brush cutter can be disassembled into two parts in a few simple steps for easy transport and space-saving storage.

Image: The Einhell GC-BC 52 I AS Thermal Brush Cutter, fully assembled with both cutting attachments.
Important Safety Instructions
SAFETY WARNING: Always read and understand this manual before operating the brush cutter. Failure to follow these instructions may result in serious injury or death.
- Keep out of reach of children and unauthorized persons.
- Wear appropriate personal protective equipment (PPE) including eye protection, hearing protection, gloves, long pants, and sturdy footwear.
- Avoid contact with skin and eyes when handling fuel. In case of ingestion, consult a doctor immediately.
- Operate the brush cutter in a well-ventilated area. Do not use in enclosed spaces.
- Do not use near ignition sources, open flames, or in dangerous weather conditions (e.g., heavy rain, strong winds).
- Ensure all moving parts are completely stopped and the spark plug cap is removed before performing any maintenance, cleaning, or adjustments.
- Regularly inspect the equipment for damage, loose fasteners, and worn parts. Replace damaged or worn parts immediately with genuine Einhell spare parts.
- Maintain a safe distance from other people, children, and animals during operation.
- Never operate the brush cutter if you are tired, under the influence of alcohol, drugs, or medication.
Setup and Assembly
The Einhell GC-BC 52 I AS requires some assembly before first use. Follow these steps carefully.
1. Attaching the Handlebar
Secure the handlebar to the main shaft using the provided clamps and fasteners. Ensure it is positioned comfortably for your height and reach, allowing for balanced control.
2. Installing the Cutting Guard
Attach the cutting guard to the lower part of the shaft, above the cutting head. This guard protects you from debris and the cutting line/blade. Ensure it is securely fastened.
3. Assembling the Shaft
The brush cutter features a split shaft for easy transport and storage. To assemble, align the two shaft sections and push them together until they click into place. Secure with the locking mechanism.

Image: The split shaft mechanism, allowing the brush cutter to be separated for compact storage and transport.
4. Attaching the Harness
Connect the comfortable shoulder harness to the brush cutter. Adjust the straps to ensure the tool is balanced and comfortable to carry, distributing its weight evenly across your body to reduce fatigue.

Image: A person wearing the comfortable shoulder harness, designed to distribute the weight of the brush cutter during operation.
5. Selecting and Installing Cutting Tool
The GC-BC 52 I AS is a 2-in-1 tool, allowing you to switch between a 3-tooth blade for dense vegetation and a twin-line spool for grass trimming. Always ensure the engine is off and the spark plug cap is removed before changing cutting tools. Follow the specific instructions in your detailed manual for safe attachment and removal of each cutting head. Ensure the cutting tool is tightened very securely to prevent detachment during operation.

Image: An icon illustrating the 2-in-1 function, showing both the 3-tooth blade and the twin-line spool attachments.
Operating Instructions
1. Fueling the Brush Cutter
This brush cutter is powered by a 2-stroke engine and requires a specific fuel mixture of unleaded gasoline and 2-stroke engine oil. Refer to your detailed manual for the correct mixing ratio (e.g., 1:40 or 1:50). Always use fresh, high-quality fuel and oil. Mix the fuel in a separate, approved container before pouring it into the brush cutter's fuel tank. Do not overfill.

Image: Hands pouring fuel mixture into the brush cutter's fuel tank, located on the engine unit.
2. Starting the Engine (Quick-Start System)
The Quick-Start system simplifies engine ignition. Follow these general steps:
- Place the brush cutter on a flat, stable surface.
- Press the primer bulb several times until fuel is visible in the return line.
- Set the choke lever to the 'START' or 'COLD START' position.
- Pull the starter cord firmly and steadily until the engine briefly fires or starts. Do not pull the cord to its full extension.
- Once the engine fires, move the choke lever to the 'RUN' or 'WARM START' position.
- Pull the starter cord again until the engine starts and runs smoothly.
- Allow the engine to warm up for a few moments before engaging the throttle.

Image: An icon indicating the Quick Start Easy Starting System, designed for fast and simple engine ignition.

Image: A detailed view of the brush cutter's 2-stroke engine, showing the starter pull cord and fuel cap.
3. Using the Brush Cutter
Once the engine is running and warmed up, you can begin operation. Always wear your harness and adjust it for comfort and balance.
- Controls: The throttle trigger and on/off switch are located on the handlebar for easy access. Squeeze the throttle to increase engine speed and engage the cutting tool.
- Cutting Technique: For optimal results and safety, use a sweeping motion. When using the blade, cut from right to left. When using the line trimmer, cut with the tip of the line.
- Working Angle: Avoid working vertically or with the machine turned excessively. Always maintain the cutting head approximately horizontal to the ground.
- Engine Speed: Do not operate at full throttle constantly, but also avoid very low RPMs, which can cause clutch slippage and premature wear. Find a balanced operating speed.

Image: A user operating the brush cutter, demonstrating the comfortable grip on the adjustable handlebar and the use of the harness.

Image: A close-up of the brush cutter's control handle, featuring the on/off switch and throttle lever for easy access during operation.

Image: The brush cutter in action, using the 3-tooth blade attachment to clear dense, tall grass.

Image: The brush cutter in action, using the twin-line spool attachment to trim grass edges neatly.
Maintenance
Regular maintenance ensures the longevity and safe operation of your Einhell brush cutter. Always ensure the engine is off and cooled, and the spark plug cap is removed before performing any maintenance.
- Spark Plug: Inspect the spark plug regularly for wear and deposits. Clean or replace as needed to ensure reliable starting and engine performance.
- Air Filter: Clean the air filter frequently, especially when working in dusty conditions. A clogged air filter can reduce engine power and increase fuel consumption.
- Gearbox Lubrication: Periodically check and replenish the grease in the gearbox at the cutting head. Refer to your manual for the correct type of grease and procedure.
- Cutting Tools: Inspect the blade and line spool for wear or damage before each use. Replace worn blades or refill the line spool as necessary. Ensure cutting tools are securely fastened.
- General Cleaning: After each use, clean the brush cutter thoroughly, removing grass, dirt, and debris from the engine, cooling fins, and cutting head.
- Fuel System: For long-term storage, drain the fuel tank and run the engine until it stops to clear the carburetor of fuel. This prevents fuel degradation and starting issues.
Troubleshooting
This section addresses common issues you might encounter with your brush cutter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine won't start | No fuel, incorrect choke setting, fouled spark plug, old fuel. | Check fuel level and mixture. Adjust choke. Clean/replace spark plug. Use fresh fuel. |
| Loss of power during operation | Clogged air filter, incorrect fuel mixture, dull cutting tool. | Clean air filter. Verify fuel mixture. Sharpen/replace cutting tool. |
| Excessive vibration | Damaged or unbalanced cutting tool, loose components. | Inspect cutting tool for damage and replace if necessary. Check all fasteners for tightness. |
| Cutting tool detaches or spins freely | Cutting tool not securely fastened. | Ensure the cutting tool (blade or spool) is tightened very strongly and correctly according to the assembly instructions. |
Specifications
Key technical specifications for the Einhell GC-BC 52 I AS Thermal Brush Cutter:
| Feature | Specification |
|---|---|
| Manufacturer | Einhell |
| Model Number | 3436540 |
| Product Dimensions (L x W x H) | 98 x 31 x 12.7 cm |
| Weight | 8.5 Kilograms |
| Power Source | Gas-powered (2-stroke engine) |
| Engine Power | 1500 Watts (1.5 kW) |
| Engine Displacement | 51.7 cc |
| Speed | 7000 rpm |
| Cutting Width (Line) | 42 Centimeters |
| Included Components | 1 brush cutter, 1 comfortable harness, 1 Instruction Manual |
| Special Features | Automatic feed spool, 2-in-1 brush cutter and trimmer, Metal blades, Quick-start system |
| Assembly Required | Yes |
Warranty and Support
Einhell products are designed for reliability and performance. This product typically comes with a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions.
Spare Parts Availability: Spare parts for the Einhell GC-BC 52 I AS are generally available for a period of 2 years from the date of purchase. For technical support, spare parts, or warranty claims, please contact your local Einhell service center or authorized dealer. Contact information can usually be found on the Einhell website or in your product documentation.





