Yard Force YF5515LT
Yard Force Electric String Trimmer YF5515LT
Model: YF5515LT
Introduction
The Yard Force Electric String Trimmer YF5515LT is designed for efficient trimming and edging of lawns and garden areas. Featuring a 15-inch cutting width, a double cutting line, and an adjustable telescope tube, this tool provides powerful performance and user comfort. Its built-in edger function and vertical storage option enhance versatility and convenience for maintaining a well-groomed outdoor space.
Important Safety Information
Always prioritize safety when operating power tools. Read and understand all instructions before use. Failure to follow these guidelines may result in serious injury.
- Always wear appropriate safety gear, including eye protection (safety glasses or goggles) and sturdy gloves, to protect against flying debris.
- Keep children, pets, and bystanders at a safe distance (at least 50 feet/15 meters) from the operating area.
- Be aware of flying debris. The trimmer can propel small objects at high speeds.
- Exercise extreme caution when using the edger function near hard surfaces, obstacles, or delicate landscaping features to prevent damage to the tool or surroundings.
- Ensure the power cord is in good condition and positioned to avoid being cut or tangled during operation. Use an outdoor-rated extension cord if necessary.
- Never operate the trimmer in wet conditions or rain.
- Disconnect the power supply before performing any maintenance, cleaning, or when changing the cutting line.
Setup and Assembly
Before first use, some assembly is required to ensure the trimmer is ready for operation.
1. Attaching the Guard
Securely attach the safety guard to the trimmer head. This guard protects the user from flying debris and helps maintain the correct cutting line length.

Image: Close-up view of the trimmer head, showing the safety guard and the string spool. Ensure the guard is firmly attached before operation.
2. Adjusting the Telescope Tube
The trimmer features an adjustable telescope tube for optimal user comfort. Loosen the adjustment collar, extend or retract the shaft to your desired length, and then tighten the collar firmly to secure it.

Image: The complete Yard Force Electric String Trimmer, illustrating its overall design and the adjustable telescope tube for ergonomic use.
3. Adjusting the Auxiliary Handle
Position the auxiliary handle for comfortable and balanced operation. Loosen the handle adjustment knob, slide the handle to the desired position along the shaft, and then tighten the knob securely.

Image: Detailed view of the auxiliary handle, designed for comfort and adjustable positioning to suit different users.
4. Cord Retention System
Utilize the built-in cord retention system to prevent accidental disconnection of the power cord during operation. Loop your extension cord through the retention slot on the handle before plugging it into the trimmer.
Operating Instructions
Follow these steps for effective and safe operation of your string trimmer.
1. Starting and Stopping
To start the trimmer, ensure it is connected to a power source and press the trigger switch on the main handle. Release the trigger to stop the trimmer. Always maintain a firm grip with both hands during operation.
2. Trimming Function
Hold the trimmer with the cutting head parallel to the ground. Move the trimmer slowly and steadily across the area to be trimmed. The 15-inch cutting width and double cutting line ensure efficient and precise trimming.
3. Edger Function
To use the edger function, rotate the trimmer head 90 degrees. This allows you to create clean, precise edges along sidewalks, driveways, and flowerbeds. Guide the wheel along the hard surface for stable and straight cuts.

Image: The string trimmer being used in edger mode, demonstrating its ability to create clean lines along a paved surface.
4. Automatic Line Feed
The trimmer is equipped with an automatic line feed system. The cutting line will automatically extend when the trimmer is started and stopped, ensuring optimal line length for continuous cutting. If the line does not feed, briefly tap the trimmer head on a hard surface while the motor is running (with caution and appropriate safety gear).
Maintenance
Regular maintenance ensures the longevity and optimal performance of your trimmer.
1. Replacing the String Spool
When the cutting line becomes too short or runs out, replace the string spool. Always disconnect the trimmer from the power source before attempting to replace the spool. Refer to the diagram on the spool cover for correct winding direction if manually rewinding line.

Image: Side view of the trimmer head, highlighting the compartment where the string spool is housed for easy access and replacement.
2. Cleaning and Storage
After each use, clean the trimmer housing and guard with a damp cloth. Remove any grass clippings or debris from the cutting head. Store the trimmer in a dry, secure location, out of reach of children. The vertical storage option allows for space-saving storage.
Troubleshooting
This section addresses common issues you might encounter with your string trimmer.
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer does not start | No power supply; loose connection; damaged cord. | Check power outlet and connections. Inspect cord for damage. |
| Cutting line does not feed | Spool empty; line tangled; debris in head. | Replace spool; untangle line; clear debris. |
| Poor cutting performance | Dull or short line; incorrect technique; thick weeds. | Extend or replace line; use proper sweeping motion; make multiple passes for thick growth. |
| Excessive vibration | Damaged cutting head; unbalanced line. | Inspect cutting head for damage; ensure line is evenly distributed. |
Product Specifications
| Specification | Detail |
|---|---|
| Brand | Yard Force |
| Model Number | YF5515LT |
| Power Source | AC (Corded Electric) |
| Cutting Width | 15 Inches |
| String Spool | 0.06" x 26 ft. |
| Cutting Line Type | Double Cutting Line |
| Product Dimensions | 30 x 35 x 11 inches |
| Item Weight | 9.13 pounds |
| Color | Orange |
Official Product Video
Video: An official product video showcasing the Yard Force YF5515LT String Trimmer in action, highlighting its features and ease of use.
Warranty and Support
For detailed warranty information, please refer to the warranty card included with your product or visit the official Yard Force website. If you require technical assistance or have questions regarding your YF5515LT string trimmer, please contact Yard Force customer support. Contact details can typically be found in the product packaging or on the manufacturer's website.
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