BLACK+DECKER BEST935
BLACK+DECKER String Trimmer User Manual
Model: BEST935
Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your BLACK+DECKER 13-Inch, 4 Amp String Trimmer (Model BEST935). Please read this manual thoroughly before using the product and retain it for future reference.

Figure 1: The BLACK+DECKER 13-Inch, 4 Amp String Trimmer (Model BEST935).
Important Safety Information
Always adhere to the following safety guidelines to prevent injury and ensure proper operation of your string trimmer:
- Always wear safety goggles and closed-toe shoes when operating this product.
- Avoid operating near people, pets, or delicate plants.
- Be cautious of flying debris and sharp grass or weeds.
- Ensure the power cord is clear of the cutting path and protected from damage.
- Do not operate the trimmer in wet conditions or rain.
- Disconnect the power supply before performing any maintenance or cleaning.
Setup and Assembly
The BLACK+DECKER BEST935 string trimmer is designed for minimal assembly. Follow these steps to prepare your trimmer for use:
- Handle Assembly: Attach the auxiliary handle to the main shaft. Ensure it is securely fastened and comfortable for your grip.
- Guard Installation: Securely attach the debris guard to the trimmer head. This guard protects against flying debris during operation.
- Power Connection: Connect the trimmer's power cord to a suitable outdoor extension cord. Ensure the extension cord is rated for outdoor use and is of appropriate gauge for the length required.
- Cord Retention: Utilize the built-in cord retention system to prevent accidental disconnection during use. Loop the extension cord through the retention slot on the trimmer handle.

Figure 2: The cord retention system helps prevent accidental disconnects.
Operating Instructions
Trimming
To trim grass and weeds, hold the trimmer firmly with both hands. Position the trimmer head parallel to the ground and move it in a sweeping motion. The 13-inch cutting swath allows for efficient coverage.

Figure 3: Operating the string trimmer for general grass trimming.
Edging
The trimmer can be quickly converted to an edger for clean and precise lines along sidewalks and driveways. Rotate the trimmer head 90 degrees to position the line vertically. Walk slowly, guiding the wheel along the edge.

Figure 4: Using the trimmer in edging mode for clean lines.

Figure 5: Detailed view of the trimmer head during edging operation.
Automatic Feed Spool (AFS)
This trimmer features an Automatic Feed Spool system, which automatically feeds trimmer line as needed. There is no need to bump the head to advance the line, ensuring continuous cutting without interruption.

Figure 6: The Automatic Feed Spool (AFS) system for hassle-free line feeding.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your string trimmer. Always disconnect the power before performing any maintenance.
Cleaning
- After each use, clean the trimmer head and guard to remove grass clippings, dirt, and debris.
- Use a damp cloth and mild soap. Do not use harsh chemicals or abrasive cleaners.
- Ensure all vents are clear of obstructions to prevent overheating.
Line Replacement
While the AFS system manages line feeding, the spool will eventually need replacement. Refer to the product's specific instructions for replacing the trimmer line spool. Use only BLACK+DECKER recommended replacement spools.
Storage
- Store the trimmer in a dry, secure location, out of reach of children.
- Protect the power cord from damage during storage.
Troubleshooting
If you encounter issues with your BLACK+DECKER string trimmer, consult the table below for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer does not start. | No power supply; faulty cord; motor issue. | Check power outlet and extension cord. Ensure cord is securely connected. If problem persists, contact customer support. |
| Trimmer line does not feed automatically. | Spool empty; line tangled; debris in head. | Replace spool if empty. Clear any debris from the trimmer head. Untangle line if necessary. |
| Poor cutting performance. | Worn or short line; cutting too much at once. | Ensure line is at proper length (AFS should manage this). Take smaller passes. |
| Excessive vibration or noise. | Damaged line; loose components. | Inspect line for damage and replace if needed. Check all fasteners for tightness. |
Product Specifications
| Feature | Detail |
|---|---|
| Brand | BLACK+DECKER |
| Model Name | BEST935 |
| Power Source | Corded Electric |
| Motor Amperage | 4 Amp |
| Cutting Width | 13 Inches |
| Item Weight | 2.7 Kilograms (approx. 5.95 lbs) |
| Product Dimensions (LxW) | 8.6"L x 6"W (Trimmer head dimensions) |
| Assembly Required | No (Minimal assembly for handle/guard) |
| UPC | 885911704311 |
| Included Components | BLACK DECKER 4.0A 13IN STRING TRIMMER |
Warranty and Support
Warranty Information
BLACK+DECKER products are manufactured to high quality standards and are guaranteed for a specific period from the date of purchase against manufacturing defects. Please refer to the warranty card included with your product for specific terms and conditions, or visit the official BLACK+DECKER website for detailed warranty information.
Customer Support
For technical assistance, replacement parts, or service inquiries, please contact BLACK+DECKER customer support. Contact information can typically be found on the product packaging, the official BLACK+DECKER website, or by calling their toll-free support line.
You can also visit the official BLACK+DECKER store on Amazon for more information: BLACK+DECKER Amazon Store
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