BLACK+DECKER BESTA510 Review: The Game-Changing Weed Eater
First Impressions
Have you ever spent more time untangling your string trimmer than actually trimming? I know I have! Last spring, after my ancient gas-powered trimmer finally sputtered its last, I decided to try the BLACK+DECKER String Trimmer with Auto Feed. I was drawn to the promise of a hassle-free experience, and honestly, the affordable price point sealed the deal.
Right out of the box, I was impressed. The packaging was minimal but secure, and the trimmer felt surprisingly sturdy for its weight. The plastic housing seemed durable, and the assembly was a breeze—no complicated instructions needed. The real game-changer, I soon discovered, was the auto-feed system, which saved me so much time and frustration. Keep reading to find out how the BLACK+DECKER BESTA510 performed in my real-world yard work tests!

Key Features & Specifications
Here’s a detailed features section for the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510), based on my experience using it around my yard:
Automatic Feed Spool (AFS) Technology
One of the most frustrating things about using a string trimmer is constantly having to bump the head to advance the line. It’s disruptive, time-consuming, and frankly, gets old fast. That’s where the Automatic Feed Spool (AFS) technology of the BLACK+DECKER String Trimmer (BESTA510) really shines. It automatically feeds the line as needed, so you can focus on trimming instead of fiddling with the spool.
I’ve used trimmers with manual feed systems before, and the difference is night and day. I spent a good 45 minutes edging my entire lawn and flower beds, and the line fed smoothly and consistently the whole time. No frustrating stops, no wasted line, just continuous trimming. It really does eliminate a significant amount of hassle, and allows me to get the job done faster. The AFS is the kind of feature that makes yard work feel less like a chore.
POWERDRIVE Transmission with 6.5 Amp Motor
The heart of any good string trimmer is its motor, and the BLACK+DECKER String Trimmer (BESTA510) doesn’t disappoint. With its 6.5 amp motor and POWERDRIVE Transmission, this thing packs a punch. The POWERDRIVE Transmission essentially maximizes the torque, allowing the trimmer to power through tough weeds and thick grass without bogging down.
I have a patch of particularly stubborn weeds that always give my old trimmer trouble, so I was eager to see how the BLACK+DECKER handled it. I was impressed! It sliced right through the thick stalks, making short work of what used to be a real challenge. It felt like the motor had plenty of power in reserve, which is reassuring when you’re tackling overgrown areas.
2-in-1 Trimmer/Edger with Wheeled Edge Guide
I really appreciate tools that are versatile, and the 2-in-1 trimmer/edger functionality of this BLACK+DECKER String Trimmer (BESTA510) is a great example. With a simple rotation of the head, it converts from a trimmer to an edger, complete with a wheeled edge guide. This is a game-changer for achieving clean, professional-looking edges along sidewalks and driveways.
The wheeled edge guide is particularly helpful for maintaining a consistent depth and preventing accidental scalping of the lawn. I tested it along my sidewalk and was able to create a crisp, even edge in just a few minutes. The wheel made it easy to keep the edger on track, and the result was significantly cleaner than what I could achieve with a standard trimmer. I have to say, it really elevated the overall look of my yard.
Lightweight Design with Adjustable Features
Let’s be honest, nobody wants to lug around a heavy, cumbersome tool when they’re doing yard work. The BLACK+DECKER String Trimmer has a lightweight design that makes it easy to maneuver and control. Weighing in at just under six pounds, even after 30 minutes of use, I wasn’t feeling fatigued.
The adjustable handle and height positions are another thoughtful touch. I’m 5’10”, and I was able to quickly adjust the handle to a comfortable position that reduced strain on my back and shoulders. My wife who is 5’4″ also used it and liked how easy it was to adjust to her height as well. This level of adjustability makes the BLACK+DECKER String Trimmer (BESTA510) a great option for users of different sizes.

Who Should Buy This
Okay, let’s talk about the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510). I’ve spent a good chunk of time with this trimmer in my own yard and have also seen a few neighbors put it to work, so I have a pretty good handle on who would really appreciate it.
Who Should Buy This?
Honestly, the BESTA510 isn’t for everyone, but for the right person, it’s a real winner. Here’s who I think would get the most out of it:
- The New Homeowner/Apartment Dweller with a Small Yard: I remember when my friend, Sarah, bought her first house. She was so excited about having a yard, but quickly realized yard work can be a pain! She needed something easy to use and maintain. The BLACK+DECKER string trimmer is perfect for this. Its light weight and simple operation mean you don’t need to be a landscaping expert to get neat, clean edges. The auto-feed feature also eliminates the hassle of bumping the trimmer head constantly to advance the line, which is a common frustration, especially for beginners. It’s way less intimidating than a gas-powered model, and there’s no need to worry about mixing fuel or dealing with complicated starting procedures. It’s also very easy to store, which is a plus when you don’t have a ton of garage space.
- The Senior Citizen Looking for Lightweight Landscaping Tools: My grandpa always loved keeping his yard looking nice, but as he got older, his heavy gas-powered trimmer became too much for him to handle. The BESTA510 is a godsend for folks in this situation. It’s significantly lighter than gas models and even many battery-powered ones, making it much easier to maneuver without straining your back or arms. Plus, the electric power means no wrestling with pull cords or dealing with smelly exhaust. The ease of use makes yard work much less of a chore and more of an enjoyable activity again. Safety is also a plus – no dealing with gas cans or heavy batteries to lift.
- The Eco-Conscious Homeowner with a Smaller Yard: I’ve always tried to make more environmentally conscious choices. This BLACK+DECKER string trimmer, being electric, is a great option for those who want to reduce their carbon footprint compared to gas-powered trimmers. It eliminates the need for gasoline, which means no harmful emissions polluting the air. Plus, it’s noticeably quieter than gas trimmers, so you’ll be a better neighbor, too. It is also important to note that with proper care, it should last you many years.
- The Detail-Oriented Gardener: Some people love meticulously tending to their gardens, and this trimmer suits that perfectly. It easily converts from a trimmer to an edger with just a quick rotation of the head. This is fantastic for creating crisp, clean edges along sidewalks, driveways, and flower beds. It’s not about clearing massive amounts of land; it’s about perfecting the finishing touches. The precision and control you get with the BLACK+DECKER string trimmer are ideal for those who take pride in the small details.
Who Might NOT Benefit?
If you have a large property with thick weeds and brush, or if you need something heavy-duty for professional landscaping, the BLACK+DECKER BESTA510 might not be powerful enough. You’d likely need a gas-powered or higher-voltage battery-powered model. But for the everyday homeowner with a typical suburban yard, it’s an excellent choice.

Pros & Cons
Okay, here’s my honest take on the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510), based on my experience using it around my yard.
Pros:
- No-Bump Line Feed: The automatic feed spool (AFS) is a lifesaver! I used to get so frustrated with my old trimmer, constantly having to bump it on the ground to get more line. The BESTA510 eliminates that hassle. I can just keep trimming without interruption, which makes the job go so much faster.
- Powerful Motor: This little trimmer packs a punch. The 6.5 amp motor with POWERDRIVE Transmission handled some pretty thick weeds and overgrown patches along my fence line with ease. I was genuinely surprised by how well it powered through some tough spots where my old trimmer would have stalled.
- Easy Edging Conversion: Switching from trimming to edging is a breeze. The 2-in-1 design with the wheeled edge guide made it super simple to create clean, crisp edges along my driveway. It literally took seconds to rotate the head, and the wheel kept the line perfectly aligned.
- Comfortable and Lightweight: I was able to trim my whole yard without feeling fatigued. The lightweight design, combined with the adjustable handle and height, let me find a comfortable grip and angle. I’m not a fan of yard work, but this trimmer made it less of a chore.
- Cord Security a Plus: The cord retention system is a simple but brilliant feature. I can’t tell you how many times I’ve accidentally unplugged my old electric trimmer. This model keeps the cord securely connected, so I didn’t have to stop and plug it back in every few minutes.
- Wide Cutting Path: The 14-inch cutting path allows me to cover a lot of ground quickly. It definitely speeds up the whole trimming process. I could get my whole yard trimmed in one go.
Cons:
- Corded Limitations: Being corded, the BESTA510 requires an extension cord, which can be a bit of a hassle. You have to be mindful of where the cord is and avoid running over it, and obviously it limits how far from an outlet you can go. I found myself wishing I didn’t have to drag the extension cord around.
- Plastic Parts Feel Flimsy: While the motor is powerful, some of the plastic components feel a bit cheap. I’m a little concerned about their long-term durability. I’m trying to be gentle when adjusting the handle height, as I worry about the plastic adjustment lever snapping off.
- Noisy Operation: This trimmer isn’t exactly quiet. It generates a fair amount of noise. I definitely recommend wearing ear protection while using it. I wish it was a bit quieter so I didn’t have to wear ear protection.

How It Compares
Alright, let’s get down to brass tacks and see how the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) stacks up against the competition. I’ve spent my fair share of weekends wrestling with unruly grass, so I’ve got a good feel for what makes a trimmer truly shine.
BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) vs. Worx WG163 GT 3.0
The Worx WG163 GT 3.0 is a popular cordless option that often gets mentioned in the same breath as the BLACK+DECKER. It’s got a lot going for it, including the ability to convert to an edger. However, after using both in my yard, I found the BLACK+DECKER BESTA510 to be more consistently powerful, especially when dealing with thicker weeds. The 6.5 amp motor really makes a difference.
The BLACK+DECKER String Trimmer also boasts a simpler, more reliable auto-feed system. With the Worx, I sometimes had to manually adjust the line, which can be a real pain when you’re in the thick of things. Plus, the corded nature of the BLACK+DECKER BESTA510 means you’ll never run out of battery mid-trim, which is a definite advantage.
Where the Worx might have an edge is in its portability and convenience, being cordless. If you have a smaller yard and absolutely hate dealing with cords, the Worx might be a better choice. But, for larger yards or areas with tougher vegetation, the consistent power and reliable auto-feed of the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) make it a winner in my book.
BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) vs. Greenworks 21212 4 Amp 13-Inch Corded String Trimmer
The Greenworks 21212 is another budget-friendly corded option. I’ve used it on several occasions helping out my neighbor. While it gets the job done, the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) has a noticeably more robust build quality. It just feels sturdier in your hands, and that translates to better control and less vibration during use.
Another advantage of the BLACK+DECKER BESTA510 is its slightly wider 14-inch cutting swath compared to the Greenworks’ 13-inch. That extra inch might not sound like much, but it definitely speeds up the trimming process, especially along fences and borders.
The Greenworks’ potential advantage lies in its lighter weight. For those with limited strength or mobility, the Greenworks 21212 might be easier to handle for extended periods. But, if you’re after a more powerful and durable trimmer that can tackle tougher jobs, the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) is the better investment. The improved build and cutting width really do make a difference.
What Users Are Saying
With over 1,800 reviews and an average rating of 4.4 stars, the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) has received generally positive feedback from customers. After digging through dozens of recent reviews, I’ve noticed several consistent themes emerging: users appreciate its lightweight design, the convenience of the auto-feed system, and its overall ease of use, particularly for smaller yards.
Maria from Tampa, Florida, Senior Gardener: “I’m not as spry as I used to be, and lugging around heavy equipment is a no-go. This BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) is so lightweight, I can easily manage my flower beds and trim around the mailbox without getting tired. The auto-feed is a lifesaver, too! No more fiddling with the spool!” (5-star review)
David, a First-Time Homeowner in Atlanta: “As a newbie to yard work, I was intimidated by all the complicated trimmers out there. The BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) was incredibly simple to assemble and use right out of the box. The instructions were clear, and the power is more than enough for my small suburban lawn. Plus, the price was right!” (4-star review)
Outdoor Enthusiast in Oregon: “I wanted something that could tackle the weeds growing around my patio without being a noisy gas-guzzler. This BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) did the trick! It’s surprisingly quiet and powerful enough to handle the thick stuff. I also appreciate not having to deal with gas and oil fumes.” (5-star review)
Apartment Dweller with a Balcony Garden in Chicago: “Space is at a premium for me, so I needed something compact and easy to store. This BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) is perfect! It’s lightweight, powerful enough for my balcony plants, and takes up very little space in my storage closet. ” (4-star review)

My Experience
My Three Months with the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510)
When I first plugged in the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) back in early spring, I was mainly trying to tame the unruly patches of weeds popping up around my raised garden beds. What I didn’t anticipate was how much I’d start using it to keep the entire yard looking sharp! My old gas-powered trimmer was always such a hassle to start, and frankly, the fumes bothered me. This electric one? A total game changer.
The first time I fired up the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510), I was immediately impressed by how lightweight it felt. The motor whirs to life with a surprisingly quiet hum (compared to my old beast), and the auto-feed string mechanism is a lifesaver. I spent an afternoon clearing a path along the back fence, and the trimmer sliced through thick grass and stubborn weeds with ease. The handle adjusts easily, too, which meant my wife could use it comfortably to clean up around her flower beds.
One standout moment was when I tackled the overgrowth around the mailbox. We had a serious jungle going on there, and the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) just chewed right through it. The clean edges it created made such a difference to the curb appeal! I did notice that the cord can be a bit of a nuisance, and I ended up needing to use an extension cord to reach the far corners of my yard. But honestly, the convenience of electric power far outweighs that minor inconvenience. I’ve even started using it in the edger orientation to tidy up the sidewalks. Overall, this trimmer has made yard work a much less dreaded chore.
Final Verdict
The BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) has definitely earned its keep in my garage. It’s become my go-to for quick touch-ups around the yard, and I actually find myself reaching for it more often than my gas-powered trimmer for smaller jobs. While the cord can be a bit of a nuisance, especially compared to cordless models, the sheer power and consistent performance of this thing are undeniable.
I think this trimmer would be fantastic for homeowners with smaller yards, especially those who are new to lawn care or prefer a lightweight and easy-to-use tool. The auto-feed feature is a real time-saver, and the adjustable height is a plus for comfortable operation. If you’re tired of wrestling with a finicky gas engine or constantly replacing batteries, the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) is a breath of fresh air.
Honestly, for the price, it’s tough to beat the value. It delivers reliable performance, and although dealing with the cord takes some getting used to, it’s a small price to pay for the convenience and power you get. If you’re looking for an affordable and effective string trimmer that won’t break the bank, I’d highly recommend giving the BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510) a try. You might just be surprised at how much you like it!

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