1. Safety Information
Before operating the MAXTRA Gas String Trimmer, it is crucial to read and understand all safety precautions, operating instructions, and user protection advice detailed in this manual. Failure to do so may result in serious injury or property damage. Always wear appropriate personal protective equipment (PPE) including eye protection, hearing protection, and sturdy footwear.
Fuel handling precautions, operating instructions, and user protection advice. Refer to the product manual for detailed safety information.
2. Product Overview
The MAXTRA Gas String Trimmer is a versatile 3-in-1 tool designed for various lawn and garden tasks. It can be easily converted between a string trimmer, a 3T blade cutter, and a 40T brush cutter, offering efficiency and adaptability for different cutting needs.
This powerful tool features an 18-inch cutting path for efficient coverage and utilizes a durable 2.4mm rigid twisted-nylon line for effective weed and grass trimming. Its 42.7cc 2-cycle engine ensures robust performance, and the upgraded Quick-Start system facilitates easy starting for both cold and warm conditions.

Figure 2.1: MAXTRA Gas String Trimmer 3-in-1 Combo with included accessories.

Figure 2.2: The three interchangeable trimming heads for versatile use.
3. Setup
3.1 Fuel Mixing
The MAXTRA Gas String Trimmer requires a specific fuel mixture of gasoline and 2-cycle oil. Always use fresh, high-quality unleaded gasoline and a reputable 2-cycle engine oil. Refer to the engine's specifications for the correct mixing ratio (e.g., 50:1 or 25:1). Use a dedicated fuel mixing bottle to ensure accurate proportions.
Video 3.1: Detailed instructions on how to properly mix fuel for the MAXTRA engine.
3.2 Attaching Trimming Heads
The trimmer comes with three different cutting heads: a string trimmer head, a 3-tooth blade, and a 40-tooth brush cutter. To attach a head, ensure the engine is off and cool. Align the head with the shaft and secure it according to the instructions provided with the specific attachment. Always ensure the head is firmly secured before operation.
3.3 Starting the Engine
To start the engine, ensure the fuel tank is filled with the correct mixture. Prime the carburetor bulb several times until fuel is visible. Set the choke to the 'start' position (usually closed). Pull the starter cord firmly until the engine attempts to start. Once it sputters, move the choke to the 'run' position (open) and pull the cord again until the engine runs smoothly. Allow the engine to warm up for a few moments before engaging the throttle.
Video 3.2: Step-by-step guide on how to start the MAXTRA engine, including fuel priming and choke operation.
4. Operating Instructions
The MAXTRA Gas String Trimmer is designed for comfortable and efficient operation. The humanized shoulder strap helps reduce fatigue and vibration during extended use. The special bump-up design allows for easy line release by simply pressing the bottom of the string trimmer head against the ground.
4.1 String Trimmer Operation
For trimming grass and light weeds, use the string trimmer head. Hold the trimmer firmly with both hands, maintaining a comfortable distance from your body. Swing the trimmer in a sweeping motion, cutting small amounts of grass at a time. The 18-inch cutting path allows for efficient coverage.

Figure 4.1: Illustrates the larger 18-inch cutting path of the MAXTRA trimmer for increased efficiency.
Video 4.1: Demonstrates the MAXTRA Gas String Trimmer in action, showcasing its cutting capabilities.
4.2 Blade Operation (3T and 40T)
For thicker brush, dense weeds, or small saplings, switch to the 3-tooth blade or the 40-tooth brush cutter. The 3-tooth blade is suitable for general brush, while the 40-tooth blade is designed for tougher vegetation and small trees. Always ensure the appropriate safety guard is in place when using blades. Operate with caution, maintaining a firm grip and stable footing.
Video 4.2: Overview of the 3-in-1 gas string trimmer, highlighting its various functions and attachments.
4.3 Ergonomics and Comfort
The trimmer is designed to be suitable for users between 5 and 6.5 feet tall. The adjustable handle and included shoulder strap contribute to user comfort and reduce strain during prolonged use.

Figure 4.2: Ergonomic design for various user heights, ensuring comfortable operation.
5. Maintenance
Regular maintenance is essential to ensure the longevity and optimal performance of your MAXTRA Gas String Trimmer. Always disconnect the spark plug wire before performing any maintenance.
5.1 Air Filter
Inspect and clean the air filter regularly, especially after heavy use. A clogged air filter can reduce engine performance. Clean with warm, soapy water, rinse thoroughly, and allow to dry completely before reinstallation. Replace if damaged or excessively dirty.
5.2 Spark Plug
Check the spark plug periodically for wear or carbon buildup. Clean or replace as needed. Refer to the specifications for the correct spark plug type and gap setting.
5.3 Fuel Filter
The fuel filter, located inside the fuel tank, should be inspected and replaced annually or if fuel delivery issues occur. Use only genuine replacement parts.
5.4 Cutting Head Maintenance
For the string trimmer head, regularly check the line for wear and replace as needed. For the blades, inspect for dullness, nicks, or damage. Sharpen dull blades or replace damaged ones to maintain cutting efficiency and safety.
5.5 Storage
When storing the trimmer for extended periods, drain all fuel from the tank and run the engine until it stops to clear the carburetor. Store in a clean, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
This section provides solutions to common issues you might encounter with your MAXTRA Gas String Trimmer.
6.1 Engine Not Starting
- No Fuel or Incorrect Mixture: Ensure the fuel tank contains the correct gasoline-oil mixture.
- Choke Setting: Verify the choke is in the correct position for starting (closed for cold start, open for warm start).
- Spark Plug: Check the spark plug for fouling or damage. Clean or replace if necessary.
- Primer Bulb: Ensure the primer bulb is fully primed with fuel.
- Throttle Position: Make sure the throttle is in the correct starting position.
6.2 Engine Stalls During Operation
- Fuel Supply: Check for low fuel or a clogged fuel filter.
- Air Filter: A dirty air filter can restrict airflow. Clean or replace.
- Overheating: Ensure the engine cooling fins are clean and not obstructed.
6.3 Poor Cutting Performance
- Dull or Damaged Blade/Line: Replace or sharpen blades, or replace worn trimmer line.
- Incorrect Line Feed: For string trimmers, ensure the line is feeding correctly. If the bump-feed mechanism is stuck, clear any debris.
- Engine Power: If the engine struggles, check fuel mixture, air filter, and spark plug.
7. Specifications
Detailed technical specifications for the MAXTRA Gas String Trimmer 3-in-1 Combo.

Figure 7.1: Highlighting the robust 42.7cc 2-cycle engine with EPA certification.

Figure 7.2: MAXTRA's EPA Certificate, ensuring environmental compliance.

Figure 7.3: Key specifications of the MAXTRA Gas Trimming Tool.
| Specification | Detail |
|---|---|
| Brand | MAXTRA |
| Power Source | Gas Powered |
| Color | Red |
| Item Weight | 23.1 Pounds |
| Cutting Width | 18 Inches |
| Product Dimensions | 138"L x 12"W |
| Assembly Required | No |
| Is Cordless? | Yes |
| Manufacturer | MAXTRA |
8. Warranty and Support
MAXTRA provides a 1-year complimentary service for this product. In case of any issues, free replacement parts will be provided. For any problems encountered during or after purchase, please contact MAXTRA customer service directly. They offer 24-hour online support to assist you.
For further assistance, please refer to the contact information provided with your product packaging or visit the official MAXTRA website.