If you’re shopping for a new gas string trimmer, you don’t have to wade through hundreds of options alone. We’re here to help with this roundup of the best gas string trimmers for the money.
We’ve collected detailed information on each product’s specifications, along with tips from customer reviews, to help you select the best gas string trimmer for your yard.
String trimmers — or weed eaters, weed wackers, weed trimmers, grass trimmers, or whatever else you choose to call them — make it easy to cut grass and weeds in hard-to-reach or sensitive spots.
Gas-powered models, though loud and bad for the environment, are really the only option if you need a high level of power coupled with high mobility.
Check out our top picks for the best gas string trimmers of the year to find heavy-duty tools perfect for homeowners with lots of grass to trim.
Top 7 Gas String Trimmers – Reviews
1. Ryobi RY253SS 25cc 2-cycle straight shaft string trimmer
Our top pick, the RY253SS straight shaft model from Ryobi, is affordable, versatile, easy to use for a gas weed eater, and powerful enough for just about any residential yard work.
The machine’s 25 cc, 2-cycle engine features a full crankshaft, which essentially means the engine will last longer. Several users reported that the engine starts easily and reliably (though starting any gas engine can be difficult sometimes).
One of the greatest benefits of this trimmer is that it’s compatible with Ryobi’s line of “Expand-It” products. By purchasing extra attachments, you can easily convert this one tool into many others, including an edger, blower, and tiller. If you need more than just a string trimmer to tidy up your lawn, you’ll save money and storage space with this Ryobi tool.
Even if you only use the RY253SS as a weed eater, it’s worth the price you pay. The large 18-inch cutting swath lets you finish trimming faster, the long straight shaft helps you reach around obstacles, and the reel-easy string head makes threading a new line simple for the user.
- Engine power: 25 cc
- Cutting swath: 18 inches
- Line diameter: 0.095 inches
- Weight: 12.2 lbs
✓ Converts to other power tools with Ryobi attachments (sold separately)
✓ Large cutting swath
✗ Some reviewers reported the cutting head coming unattached while in use
✗ Some users had to replace the carburetor after a short period of time
2. Husqvarna 128LD 2-cycle straight shaft string trimmer
The Husqvarna 128LD trimmer combines power and convenience. This weed eater’s 28 cc, 2-cycle engine is among the most powerful on this list, so it’s great for tough yards with thick grass and lots of weeds.
The 128LD is also lightweight compared to many of our other picks, making it easier to carry for longer.
Along with the big selling points (namely the strong engine and seal of approval from Husqvarna, one of the most trusted names in power tools), the 128LD has lots of little special features that make it easier to use.
One is the “Tap ‘N Go” line release, which lets you release the trimmer line by simply tapping the cutting head against the grass. Loading a new line is easy, too, since the head has auto-feed.
If you’re nervous about starting a gas engine, Husqvarna’s SmartStart technology reduces resistance on the cord to make startups easier.
Like Ryobi, Husqvarna has a line of additional attachments available that can turn this trimmer into other power tools, including an edger, tiller, and pole saw.
While most reviewers reported the machine working great, some noted that the 128LD is a little short for a straight shaft trimmer. Some users who are around 6 feet tall said they had to hunch over while using the tool.
- Engine power: 28 cc
- Cutting swath: 17 inches
- Line diameter: 0.095 inches
- Weight: 11 lbs
✓ Powerful engine
✓ Easy startup
✓ Converts to other power tools with Husqvarna attachments (sold separately)
✗ Short shaft makes it inconvenient to use if you are tall
✗ Some reviewers reported that the engine will run only in short spurts after a year or less of use
3. Poulan Pro PR28SD 2-cycle straight shaft string trimmer
The PR28SD trimmer from Poulan Pro has many of the same features as the Husqvarna 128LD, but this model is significantly less expensive. This Poulan has a powerful 28 cc, 2-stroke engine like our Husqvarna pick, along with convenient perks like “Tap ‘N Go” line release and easy spring-assisted starting.
Also like our other top picks, the PR28SD can convert to an edger, cultivator, brush cutter, and other power tools with extra attachments.
One major difference in the Poulan Pro model is its weight. At 14 pounds, it’s on the heavier side and may be difficult for some homeowners to carry for a long time.
Some users also reported that starting the trimmer can be difficult at times, so this may not be the best option for someone inexperienced with gas engines.
Those inconveniences aside, the PR28SD is a great value for its price. While it isn’t quite as reliable or easy to use as the Husqvarna 128LD, you can save some bucks with the Poulan Pro model while getting a similar gas string trimmer.
- Engine power: 28 cc
- Cutting swath: 17 inches
- Line diameter: 0.095 inches
- Weight: 14 lbs
✓ Powerful engine
✓ Converts to other power tools with Poulan Pro attachments (sold separately)
✗ On the heavier side
✗ Starting isn’t always as easy as it should be
4. CRAFTSMAN WS205 2-cycle straight shaft string trimmer
With the CRAFTSMAN WS205, you can save even more money and still get a high-quality weed eater.
This CRAFTSMAN’s 25 cc, 2-cycle engine isn’t the most powerful, but it should be sufficient for residential use. This model isn’t super light in weight but it isn’t too heavy either, and the adjustable handle lets you find a working position that’s comfortable and ergonomic for you.
The main appeal of the CRAFTSMAN WS205 is that it’s affordable. It doesn’t come with as many bells and whistles as some of our other top picks, but it is compatible with TrimmerPlus brand attachments that can convert your trimmer into other lawn care tools.
Unfortunately, there is a level of risk that comes with purchasing this model. While many users were satisfied with its performance and said it trimmed thick grass and weeds well, others reported that their trimmer malfunctioned to the point that they couldn’t use it after only six months to a year.
Those that had issues also had a hard time getting in touch with the brand’s customer service. So, the WS205 will save you money, but you may end up in the (albeit minority) group to receive an unreliable product.
- Engine power: 25 cc
- Cutting swath: 17 inches
- Line diameter: 0.095 inches
- Weight: 13 lbs
✓ Converts to other power tools with TrimmerPlus attachments (sold separately)
✗ Some users reported the product having a short life
5. Remington RM25S 2-cycle straight shaft string trimmer
The Remington RM25S is a true budget pick. It’s a bit of a contradiction, since it’s heavy (more than 15 pounds), it has the smallest cutting width of all the trimmers on this list, and it has only a 25 cc, 2-cycle engine. For the price, though, it’s a solid weed eater and brush cutter for residential use.
Even though it’s heavy, this model has some convenient features that make it easy to use, including Remington’s QuickStart technology and a bump head, which releases string when you press it against a hard surface. The ergonomic handle is adjustable for right-handed and left-handed users.
Users reported that the RM25S starts smoothly, works well, and is worth the money. However, it can be difficult to restring and may not work as well after you restring it.
- Engine power: 25 cc
- Cutting swath: 16 inches
- Line diameter: 0.095 inches
- Weight: 15.4 lbs
✓ Easy to use for the most part
✗ Small cutting swath
✗ Difficult to restring
6. Husqvarna 324L 4-cycle straight shaft string trimmer
Unlike the picks we’ve listed so far, the Husqvarna 324L has a 4-cycle engine, which means it runs on straight gasoline and doesn’t require mixing fuel. Because of the high-quality Honda 4-stroke engine, the 324L is by far the most expensive trimmer on our list.
For the extra money, you also get a large 18-inch cutting width, SmartStart technology, the “Tap ‘N Go” line release feature, and Husqvarna’s T25 trimmer head, which is easy to restring.
The most incredible thing about the Husqvarna 324L? It’s extremely lightweight at just a little over 5 pounds. With this model, you get a heavy-duty, professional-grade 4-stroke engine in a gas weed eater that’s as easy to carry as most electric options.
Most users reported complete satisfaction with the 324L, but there are some minor complaints you should be aware of. To achieve the tool’s impressively light weight, the gas tank is small, which means it runs out of gas quickly, which can be an inconvenience.
Another significant disadvantage is that, unlike our other Husqvarna pick, this model is not compatible with attachments that let it do the work of multiple power tools.
- Engine power: 25 cc
- Cutting swath: 18 inches
- Line diameter: 0.095 inches
- Weight: 5.1 lbs
✓ Don’t have to mix fuel for 4-stroke engine
✓ Super lightweight
✓ Large cutting swath
✗ Small fuel tank
✗ Not compatible with other Husqvarna attachments
7. Craftsman CMXGTAMD30SA 4-cycle straight shaft string trimmer
This trimmer from CRAFTSMAN is another option with a 4-cycle engine, but this one is even more powerful than the Husqvarna 324L. In fact, this is the most powerful trimmer on our list with an impressive 30 cc engine. For extra tough grass and commercial-grade jobs, the CRAFTSMAN CMXGTAMD30SA might be the best choice.
In addition to being powerful, this CRAFTSMAN model is also easy to use, with a two-step prime and pull starting system and an easy-winding bump head that can hold a spool of up to 20 feet of line.
Fair warning: This trimmer’s powerful engine makes the tool heavy (about 18 pounds), so it might not be easy for all homeowners to use.
The good news is that, unlike our other 4-stroke pick, this trimmer is compatible with many attachments, so you can convert it into other lawn care tools. The CRAFTSMAN option is also much more affordable than the Husqvarna 324L.
- Engine power: 30 cc
- Cutting swath: 17 inches
- Line diameter: 0.095 inches
- Weight: 18 pounds
✓ Extra powerful engine
✓ Converts to other power tools with TrimmerPlus attachments (sold separately)
✓ Don’t have to mix fuel for 4-stroke engine
✗ Very heavy
✗ Some reviewers reported having to replace the cutting head after only a few uses
What is a string trimmer?
Even if you aren’t familiar with the term “string trimmer,” you’re probably familiar with the tool itself. These tools go by many names, including weed eater, weed wacker, grass trimmer, and weed trimmer. Don’t worry too much about which name to use — they’re all the same thing.
Basically, you use a string trimmer to cut grass and weeds in areas that lawn mowers won’t reach. That includes tight spots and sensitive areas you don’t want to damage, like the grass around your flower beds or hardscapes.
Instead of a blade, string trimmers use a string (or “line”) to slice through foliage. String trimmers consist of a long shaft with a cutting head, also known as a trimmer head, on one end. The cutting head is the part of the tool where you load the string, and it’s the part that does the cutting (thus the name).
Is a gas string trimmer right for you?
Aside from gas string trimmers (like the ones on this list), there are also many high-quality corded electric and cordless battery-powered string trimmers on the market.
In general, electric options are quieter, easier to use, and better for the environment than their gas counterparts since they don’t produce emissions. Electric motors also take a lot less maintenance than gas engines.
So, what are the advantages of a gas string trimmer? The biggest one is power. Gas weed eaters are almost always more powerful than their electric counterparts.
The other major benefit is that gas engines aren’t limited by either an extension cord or a battery’s run time. If a gas trimmer runs out of juice in the middle of a job, all you have to do is fill up the tank and keep working. You don’t have to wait for a battery to recharge.
For these reasons, gas string trimmers are usually the best option for people with large properties or thick growth to cut through. For small, well-kept yards, you might be better off with an electric model.
2-stroke vs. 4-stroke engine
When it comes to gas engines for power tools, you have two basic options: 2-stroke (aka 2-cycle) or 4-stroke (aka 4-cycle). The difference between the two lies in how the engine works and how many strokes of the piston it takes to generate power. But what does that actually mean for you? Here are the basics.
For a 2-stroke engine, you’ll have to either mix gasoline and oil or buy a premixed fuel blend. While this can seem like an inconvenience, it also means that you won’t have to perform regular oil changes.
Note: 2-stroke engines tend to produce more power than their 4-stroke counterparts. As you may have noticed from our top picks, 2-stroke trimmers are usually less expensive than 4-stroke weed eaters.
A 4-stroke engine runs on straight gasoline, so you won’t have to mix fuel. String trimmers with 4-stroke engines are typically quieter and have better fuel efficiency than 2-stroke weed eaters. These benefits are what makes 4-cycle trimmers cost more. However, these also require more maintenance, since these tools need regular oil changes.
What to look for
Once you know what kind of string trimmer you’re looking for, you’ll have to compare the many specific options on the market. Here are the factors we used to determine the best gas string trimmers available today, along with information on what these specifications mean for you.
Engine power: For the engines used in gas string trimmers, we measure power in cc (cubic centimeters). The measurement is technically not related to power itself but engine size.
In simple terms, the larger the engine (the higher cc rating), the more power output. You’ll need more power for tougher jobs, such as trimming through thick growth or wet grass.
Since you’ll usually pay more for a more powerful engine, you have to decide if your lawn needs the extra power enough to justify paying for it.
Cutting swath: A string trimmer’s cutting swath (or cutting width), measured in inches, relates to the size of the cutting head. This is how you determine the area of grass you can trim at once.
With a larger cutting head and cutting swath, you’ll be able to finish trimming your yard faster than you would with a smaller one.
On the other hand, if your yard has a lot of tight spaces to maneuver around, you might be better off with a smaller cutting head.
Line diameter: Line diameter tells you the thickness of the string a weed eater can hold. Thicker string is usually more durable and can cut through thicker grass.
All of our top picks hold a 0.095-inch string, which is recommended for professional use and should be more than enough to meet your needs around the house.
Weight: When you’re using a string trimmer, you have to carry it. It’s important to pay attention to how much a trimmer weighs before you buy one so you don’t choose one that’s too heavy for you.
Would you wear yourself out carrying more than 10 pounds for an extended period of time? If that’s the case, you may be better off with an electric string trimmer, since gas models tend to be significantly heavier.
To lighten the load, some string trimmers can attach to shoulder straps (almost always sold separately).
Price: Gas string trimmers can cost less than $200 or more than $400, so set your budget before you start shopping to narrow down your selection. You’ll typically pay more for things like more powerful engines, larger cutting swaths, and special features.
With our top picks, we made price the most important ranking factor to show you the models that will give you the most bang for your buck.
FAQs About Gas String Trimmers
The Ryobi RY253SS is the best gas string trimmer for the money. See our review above to find out why.
Of our top picks, the Husqvarna 324L is by far the lightest at only 5.1 pounds. That’s even light for an electric string trimmer.
That depends on your specific needs. Trimmers with curved shafts are usually shorter, lighter, and cheaper. Straight shafts are longer, so they can reach a wider radius, and these trimmers typically produce more torque. You’ll notice all of our top picks have straight shafts.
For a well-manicured yard, a lawn mower isn’t enough — you need a string trimmer (aka weed wacker, grass trimmer, weed trimmer, weed eater, etc). If you want a trimmer with high power that can move freely around your property and run for as long as you need it to, a gas weed eater is for you.
Considering price point, power, size, and weight, these top picks represent your best options on the market today.
Main Photo Credit: Michael (a.k.a. moik) McCullough / CC BY 2.0 / Flickr
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Jordan ArdoinJordan Ardoin is a writer and indoor plant enthusiast hailing from Florida. In her spare time, she enjoys chasing her two cats around the house and trying to keep her houseplants alive.
Posts by Jordan Ardoin
Only by the whirling grace of a string trimmer—slicing down the tall grass around the mailbox, front steps, fences, and flower beds—does a property look truly polished. We’ve tested string trimmers on weedy lots and steep hills, and we once flattened 12,598 square feet of an overgrown field. The Ego ST1511T Power+ String Trimmer with Powerload is the best of these tools (which are also known as weed wackers or weed eaters1).
Compared with other cordless trimmers, the Ego ST1511T Power+ String Trimmer with Powerload is on a different level. This trimmer cut through 1-inch-thick Japanese knotweed as if it were grass, while the others pathetically slapped their strings against the thick stalks. Considering all that power, you’d expect this trimmer to be noisy. But it was the quietest tool we tested, with a hair-dryer-like hum that sounded more pleasant than the whine of its competitors. This model, the latest in a long line of successful Ego trimmers, distinguishes itself with an easily adjustable telescoping shaft and a quick adjustment for the secondary handle. This allows it to work for a wide variety of heights and body types.
The Ego ST1511T is just as powerful and affordable as a gas tool, but without the messy fuel, smelly exhaust, or time-consuming maintenance. It was also the most capable cordless trimmer we found, with enough run time to cut a 1-foot-wide strip of grass almost two-thirds of a mile long on a single battery charge. The Ego comes with a push-button line-load system, which eliminates the typically tedious process of putting new line on the spool head. There are a variety of systems that do this, but the Ego’s is the easiest we’ve tested. It wasn’t the lightest trimmer we tried, but its excellent balance and handle adjustments made it one of the simplest to swing around and maneuver in tight spots. This model replaces our previous pick, the Ego ST1521S, which is almost identical except that it lacks the telescoping shaft and the easy handle adjustment.
If the Ego ST1511T is not available, we also like the Ego ST1521S Power+ String Trimmer with Powerload. This is the previous generation of Ego string trimmer, and it shares much of what makes the ST1511T such a success: long battery life, excellent power, and the easy line change. The significant differences are that it doesn’t have the telescoping shaft or the quick adjustment on the handle, so it’s not as flexible for varying body heights. The two trimmers are typically sold for around the same price, so we recommend choosing this model only if the ST1511T is out of stock and you can’t wait for it.
If you’re looking for a trimmer that can double as an all-purpose lawn tool, we also like the Ryobi RY40270 40V Brushless Expand-It String Trimmer. Though it can’t cut tall and very thick weeds with the ease of the Egos, it still has the strength to slice through dense grass and the run time to handle a large property. Unlike the Egos, however, the Ryobi is also “attachment-ready.” So you can remove the trimmer head and replace it with any number of other yard tools, like a pole saw, a brush cutter, or a mini cultivator (each sold separately). The Ryobi typically sells for about the same as the Ego ST1511T. But, again, the Ryobi isn’t as effective on the thick stuff. It’s also heavier and much louder, and it doesn’t have the ergonomic ease of the telescoping shaft or on-the-fly handle adjustment. The Ryobi uses a hand-crank reel mechanism, which makes line loading easier than with the older models, but it’s not as good as our main pick’s push-button system.
If you have only minimal trimming needs, we like the Worx WG170.2 GT Revolution 20V PowerShare String Trimmer and Edger. It’s much smaller than the Ego ST1511T and nowhere near as powerful, but it’s great on grass. And it has some ergonomic adjustments not found on competing models that make it comfortable for people with various body types. This model comes with a small set of wheels, which adjust to convert the trimmer into an edger and even a very small mini-mower. We found that the Worx was quieter than its competitors. And it’s priced in the middle range of what similar models cost.
We think the vast majority of people will be able to get by with a cordless string trimmer. But in some extreme cases, the nonstop power of a gas model is a better fit (such as for clearing large field areas or remote trimming on an extremely large property). For this, we like the Echo SRM-225 String Trimmer. It’s normally priced comparably to the Ego ST1521S, so it’s on the low side for a high-quality gas trimmer. In our own tests, the Echo handled waist-high weeds and 3-foot-tall grass with no problem, and it has a tremendous amount of positive feedback on Home Depot’s website.
Everything we recommend
Why you should trust us
We’ve been covering outdoor power equipment since 2013, with guides to lawn mowers, snow blowers, and leaf blowers. All of this research and testing has given us a firm grasp of what makes a good piece of lawn equipment. And it has provided us with a deep knowledge of the various manufacturers and their reputations for quality, availability, and customer service.
I also have extensive string trimmer experience. I currently live in New Hampshire and have about 2 acres of mowable lawn. After each cut, I spend roughly 30 minutes using a string trimmer around stone walls, flower beds, pathways, and the chicken coop. I also have about a half-mile of electric fence that needs to be maintained with a string trimmer all summer (any blade of grass that grows to touch the fence reduces its effectiveness).
Harry Sawyers, the editor of this guide and a former pro landscaper, has tested many of the trimmers at his Los Angeles property, which is too steep to mow in many places. The typical local practice in this situation: Scrape it bare with a string trimmer so there’s nothing left to burn when fire season rolls around.
Who this is for
A string trimmer—also known as a weed wacker, a strimmer, a weed whip, or a weed eater—is the perfect complement to a lawn mower, adding a nice, crisp finish to your lawn. Whereas lawn mowers are intended for wide-open areas, string trimmers are for cleaning up the edges and all the places the mower can’t go: nooks, crannies, and tight spots between and under hedges; narrow pathways and steep inclines; in close quarters near mailbox poles, raised beds, trees, and lampposts; and along fences and walls.
Our string trimmer recommendations are for those who want a reliable, powerful tool to help with post-mow cleanup and weed clearing. We weren’t looking for a pro-grade tool that could be used all day to flatten a hay field or that was necessarily durable enough for constant, rugged use. We were looking for one that was convenient for intermittent regular use, with enough oomph to handle grass, thick weeds, and the occasional stalky shrub.
How we picked
For this guide, we focused on rechargeable cordless trimmers with enough power to cut everything from simple lawn grass to thick overgrown weeds. Compared with gas string trimmers, cordless models are quieter, need practically no ongoing maintenance, start with the press of a button, emit no exhaust, and can “refuel” without requiring a separate run to the gas station. Over years, our testing has proved that the best cordless tools have the run time and cutting ability for everything but the most extreme clearing jobs. For all of this power and convenience, a cordless string trimmer is roughly the same price as a gas model—and even less, once you factor in the long-term cost of purchasing gas and oil and the time spent on maintenance. In some extreme circumstances, only a gas tool will do—and we have a gas-powered pick for those. But those rarely apply to most people’s needs, so the rest of this section outlines our criteria for cordless string trimmers.
Power: All of the cordless trimmers we looked at can cut regular lawn grass, but we wanted one that also had the ability to handle tall weeds or densely overgrown grass. That’s where we started seeing significant differences among the models. The weaker trimmers strained their way through tougher conditions, either getting bound up in the grass or pushing it over instead of cutting it. Going even deeper into the underbrush, only a couple of models could slice through really thick plants, like fat Japanese knotweed stalks. Although this is territory that really calls for a brush cutter, it’s comforting to know that some of the trimmers can handle it in a pinch.
We did look at a number of very light-duty trimmers, ideal for smaller lawns. These use a thinner string and can cut grass and some weeds, but they struggle with thicker, stalkier plants.
Run time and charge time: Cordless trimmers typically come with a single battery, so it’s crucial that they have a decent run time. When we took the trimmers (40-volt and up) out into an overgrown field, even the worst-performing cordless model cut more than 1,000 square feet of thick, dense grass. Translating this to more practical terms, they could clear a 1-foot-wide strip of grass around an entire football field. The best-performing trimmers cut approximately 3,400 square feet, which translates into trimming the same 1-foot swath around the perimeter of more than three and a quarter football fields. That’s a lot. And keep in mind that we performed our test in very difficult cutting conditions, with the tools cranked to their highest speeds. Under regular conditions, run time is likely to be even longer.
But charge time is a different story. Most of these trimmers use big batteries, and they can take a while to fill up. Because it’s entirely possible for the battery to empty out during use, we wanted a tool with the shortest possible charge time, minimizing downtime.
Comfort and balance: Trimmers, in an ergonomic sense, are little more than a long pole with a weight on each end. They can be awkward tools to handle, so during our testing, we looked at the overall balance of each model and how easy each one was to carry around. Some come with clips for shoulder straps, which is a nice touch. Also important: how maneuverable and responsive they are. A successful model should have a lot of precision up at the trimmer head, making it easy to cut the grass—without harming the flowers.
Easy line change: With constant whipping and cutting, trimmer string breaks at a relatively quick rate, so it’s not uncommon to have to install a new string every few trimmer sessions. Putting new string on a trimmer has long been the most frustrating aspect of a string trimmer, but new models are making this easier with automatic or manual systems to reel the line into the head of the tool.
Debris guard: Down at the trimmer head, there is a shield to protect the feet and lower legs from flying debris. In our tests, we found that wider guards were better. Some models (usually those designed with the pro in mind) had narrow guards, and they stopped some debris but not all, leaving our legs and feet stained green by the end of a trimming session. The larger guards don’t stop everything, but they do a much better job.
Cost: Unlike with outdoor equipment such as chainsaws and lawn mowers, with a string trimmer, going cordless doesn’t result in a price premium. The best straight-shaft gas trimmers are mostly in the $175 to $250 range, which is about where the solid 40-volt-plus cordless trimmers land. Again, this is just upfront pricing and doesn’t take into account long-term costs like gas and maintenance (which add to the cost of gas trimmers). Smaller trimmers, powered by 18- and 20-volt batteries, are usually in the $100 range.
Looking at models to test, we dismissed anything priced too far over $250. This was because we found too many highly rated models in the $150 to $250 range to justify going beyond that mark. This decision eliminated cordless models from pro names—such as Husqvarna and Stihl—offering trimmers in the $300 range that don’t even include a battery. You do not need to pay that much for basic lawn maintenance.
How we tested
To see how the trimmers handled different grasses—and plants—we tested them in New Hampshire at a rural property with extensive trimming needs: 187 feet of stone wall, 182 feet of split-rail fence, 180 feet of garden fencing, 137 feet of flower beds, 150 feet around a variety of structures and sheds, 51 feet of miscellaneous trimming (around trees and large rocks), and an additional 556 square feet of hillside clearing (where it’s too dangerous to use a mower). We also used many of them to clear a Los Angeles hillside, which was covered with 3-foot-tall grasses, saplings, and nettlesome thistles.
We used the trimmers between rose bushes, down the edge of a driveway, and around fire pits. During testing, we paid attention to overall ease of use, balance, ergonomics, handling, and noise.
For comparative run time and power, we hauled many of the trimmers out to an overgrown field and drained their batteries by clearing giant swaths of thick grass and dense weeds, and then calculating the total square footage each tool was able to handle. To test each trimmer’s upper range, we pitted each one against a large stand of Japanese knotweed.
Finally, to confirm our findings, we’ve spent years using our picks and other leading contenders for our day-to-day string trimming needs at a variety of properties.
Our pick: Ego ST1511T Power+ String Trimmer with Powerload
Of all the trimmers we’ve tested, the Ego ST1511T Power+ String Trimmer with Powerload combines raw cutting power, finesse, handling, convenience, and run time in a way none of the others do. It also has the easiest line-load system we’ve tested, as well as a telescoping shaft and quick handle adjustment, to accommodate people of all heights. All of the Ego trimmers we’ve tested have marathon-like run times, often outlasting the others by nearly 40% (and in most cases by more than 50%). The ST1511T has the power to slice through dense grass, gnarly weeds, and even 1-inch-thick Japanese knotweed without slowing down. All of this cutting ability is harnessed with a smooth, variable-speed trigger, which makes delicate work just as easy as brute-force clear-cutting. Though none of the trimmers we tested were quiet, the Ego ST1511T had the nicest sound, emitting a low-pitched hum, rather than the high, squealing whine of some of the others. This Ego completes the package with great balance, comfortable grips, and a simple bump-feed line advance.
On thick Japanese knotweed, the Ego blazed right through 1-inch-thick stalks like they weren’t even there.
The Ego ST1511T’s power and run time stand far above those of the other trimmers we looked at. We did a battery test on an earlier model, and the Ego, on a single battery charge, cut down about 3,400 square feet of dense field grass, weeds, and stalky shrubs (in an area nearly 60 by 60 feet). At the time, the next-best trimmer cut about only 2,100 square feet (almost 40% less); beyond that, the others cut 1,600 square feet or less (less than 50% of what the Ego accomplished). Putting the Ego’s performance in perspective, it could trim a 1-foot-wide swath of grass that was two-thirds of a mile long on a single battery charge. That’s easily enough to handle all but the most expansive lawns. Knowing this, it’s no surprise that on a single charge, the Ego ST1511T handled the trimming needs of a large New Hampshire property (which requires nearly 900 linear feet of trimming and an additional 556 square feet of mowing, in flat areas a mower can’t get to).
If you do get stranded with an empty battery, the Ego’s charger can deliver a full battery in about 40 minutes. If you’d rather have the assurance of a second battery (though we don’t think it’s necessary), additional ones are available, ranging from about $150 to $400, depending on ampere hours.
The Ego’s power is as impressive as its run time, and none of the other trimmers we tested could match its sheer cutting strength. While trimming in the field or on the Los Angeles hillside, we never had to stop, hesitate, or even slow down when using the Ego. It cut as fast as we could swing the trimmer head. Other trimmers bound themselves up in the tall grass or (when faced with a dense patch) pushed the grass over rather than cutting it. On thick Japanese knotweed, the Ego blazed right through 1-inch-thick stalks like they weren’t even there. Other trimmers either took much longer to do this or couldn’t make the cut at all.
But the Ego isn’t just for clear-cutting fields and destroying the invasive Japanese knotweed (although it’s certainly wonderful for that). The trimmer has two speeds and a variable-speed trigger. This set-up offers full control of the cutting head, allowing you to find a cutting speed that fits the task, from blasting away at thick weeds to finesse work around the perennials and delicate surfaces (like painted siding or lattice). In those more-delicate areas, we switched to the low speed setting, so we could maintain the ease of a full trigger pull but not have the trimmer at top speed.
Aside from its power, run time, and control, this tool’s ergonomics are among the best we tested. The Ego weighs a little over 10 pounds, so it wasn’t the lightest of the bunch. But it was still very easy to manage due to its nice balance and the addition of a telescoping shaft and a quick adjustment on the handle (on previous Ego models, the handle can be moved only by loosening a series of screws). These two features make it possible to customize the ergonomics of the Ego to a wide variety of body heights and types, something we’ve never really seen on these larger trimmers. The quick handle adjust also makes it easy to change the grip, if you use the trimmer as an edger.
The Ego is a dual-line unit, meaning that two strings extend from the cutting head. And it comes equipped with a 0.095-inch trimmer line, which is on the thicker side and contributes to the trimmer’s cutting ability (a wide variety of 0.095 string is available). This Ego can accept smaller lines, which, as a company rep told us, “will actually increase the run time, but it will go through more lines, because the thinner the line, the more breakage.” All of the more-powerful units we tested were dual-line cutters, and the majority of them took 0.095 string.
This Ego has the easiest line-load system we’ve ever used.
This Ego has the easiest line-load system we’ve ever used, a process described in detail in the Ego ST1510T manual (PDF). When all of the string is used up, just load about 16 feet of line through the trimmer head so that there are 8 feet sticking out of each side, and then pop its cover on. Then with the press of a button, the line automatically retracts into the trimmer head, so the whole tool is ready to go in seconds. It’s hard to overstate what an improvement this is to what’s often the single-worst aspect of using a string trimmer. With most other trimmers, the entire trimmer head needs to be disassembled and the new line manually wound onto the spool (which is always a tedious process). Ego’s system is a much-needed improvement in this area.
If the string breaks while you’re trimming, the Ego has an easy bump-feed line advance. Simply tap the bottom of the trimmer head against the ground, and a length of string is fed from an internal spool housed inside it. A small edge on the underside of the debris shield then cuts the end of the string to the proper length. The spool can hold about 16 feet of string, so you’ll have a constant supply, which is essential for longer or more aggressive trimming sessions.
Another impressive element of the Ego is its noise—or, rather, lack of noise. The trimmers we tested had noises ranging from high squeal to hair-dryer hum, and the Ego was among the quietest we looked at. It’s not an unpleasant sound, and because the Ego’s motor is down at the cutting head, it’s far away from the ear, lessening the effect even more. This is in stark contrast with gas trimmers, which position the engine at your elbow and scream like fighter jets. The Ego’s relatively pleasant sound is not only good for your own hearing but a courtesy to your neighbors, too.
Flaws but not dealbreakers
As with anything, the Ego ST1511T is not perfect, but none of the drawbacks come close to offsetting all of the good the tool provides.
The front handle’s durability is one drawback. It is cushioned with a foam padding, and even though it’s very comfortable (and something we came to appreciate during longer trimming sessions), we do worry it could tear easily if snagged on a hook, a nailhead, or maybe even a rose thorn. Most other trimmer handles are plastic or have a thin layer of rubbery padding. Even after several years of using a similar Ego, however, we’ve found that the handle has held up well, with only one small tear.
Runner-up: Ego ST1521S Power+ String Trimmer with Powerload
If the Ego ST1511T is not available, our next choice is the Ego ST1521S Power+ String Trimmer with Powerload. It’s Ego’s previous version of the tool, and it is nearly identical to the ST1511T, other than that the shaft is not telescoping and the trigger design is slightly different. The ST1521S costs about the same as the ST1511T, so we’d always opt for our main pick first. But if you need something in a hurry and the ST1511T is not available, this is an excellent second choice. You can expect about the same power, run time, and charge time, as with our main pick.
Also great: Ryobi RY40270 40V Brushless Expand-It String Trimmer
If neither Ego model is available, we also like the Ryobi RY40270 40V Brushless Expand-It String Trimmer. It doesn’t compete with the power of the Egos, but it does offer enough to get any typical job done. It has a manual-crank line-load system that’s easy to use (although not as easy as that of our main pick). And we should note the Ryobi is louder and heavier than the Egos, plus a little harder to maneuver.
Overall, the Ryobi’s performance on a full charge was in the middle of the pack—just over half of what the Egos accomplished on a full charge. And in patches of really thick, tall grass, the Ryobi trimmer head occasionally got wound up in the grass or just pushed it over instead of cutting it. And the Ryobi couldn’t sever the Japanese knotweed stalks as efficiently as the Egos. Still, when it came to regular trimming—even in heavier weed areas—this trimmer had little problem on multiple hilly properties in Los Angeles in spring 2020.
Because the Ryobi is “attachment-ready,” you can remove the trimmer head and replace it with a number of other tools, such as a brush cutter, a pole saw, or even a cultivator. We tested many of these attachments and were impressed with the results. Using the cultivator with a fully charged battery, we were able to work for an uninterrupted 15 minutes and tilled a 2-by-20-foot (40 square feet) area of the field into a ready-to-go garden bed. For a second test, on softer ground, we tilled up to a 10-by-10-foot area (100 square feet) on a single charge. In these instances, managing the cultivator is physically demanding, but these tests demonstrate that the Ryobi is capable of cleaning up garden rows or tilling flower beds in the spring.
The Ryobi has a manual line-load system that is trickier to use than the Ego’s push-button set-up. Photo: Rozette Rago
It’s easy to see how much of a charge is left in the Ryobi. Photo: Rozette Rago
The Ryobi string trimmer head (upper left) and a few of the other available attachments (cultivator, brush cutter, and pole saw). Photo: Doug Mahoney
We also liked the pole saw attachment. We were able to cut down a number of branches and small trees that had fallen over a brook and we couldn’t reach with a traditional chainsaw. In 2021, a tree worker borrowed it in a pinch and was impressed with how easy it was to use. The brush cutter worked as advertised too. In general, we were impressed with how all of the attachments performed when attached to the cordless tool.
If you do go the attachment route and want to be able to jump quickly from task to task, you may consider purchasing a second battery for about $140.
The Ryobi has a few downsides. First, it’s heavy. At 11½ pounds, it’s about a pound and a half more than our pick, a weight that takes its toll after a while. On the Ego ST1511T, the motor is located down at the cutting head, in effect counterbalancing the weight of the battery. But on the Ryobi, the motor is up by the handle. With this configuration, the balance felt slightly off, and it took a little more effort to swing the machine around. And in tight spots, like between rose bushes, the Ryobi didn’t feel as nimble as the Ego.
Compared with the Ego, the Ryobi is loud—a squeal-like, whiny loud. We recommend using ear protection no matter which string trimmer you use. But even with padded ears, it’s easy to pick up on the Ryobi’s whine.
Also great: Worx WG170.2 GT Revolution 20V PowerShare String Trimmer and Edger
For small lawns with minimal trimming needs, we like the Worx WG170.2 GT Revolution 20V PowerShare String Trimmer and Edger. We tested it against a number of other light-duty string trimmers, and it was clearly the best. It impressed us with its fantastic ergonomic adjustments, quick speed, quiet operation, light weight, and the wheeled edging capabilities. The Worx is much smaller than our other picks, and it can’t handle thick weeds or extended trimming sessions. But for small lawns or people who simply want a lighter load, it’s a budget-friendly trimmer that should get the job done.
The Worx actually has three modes: string trimmer, edger, and mini-mower. There’s a removable set of wheels, for when you want to use the Worx as an edger and a mini-mower. The wheels are installed at the top of the trimmer head, and when it’s time to edge, you simply rotate the head until the trimming string is parallel to the shaft. This movement shifts the rollers down to the ground (this maneuver is easiest for right-handed users). The wheels add control and precision for edging jobs.
To convert the trimmer into a mini-mower, you remove the wheels and reinstall them at the back of the debris guard, so they stick down below the plane of the trimmer string. Now you have a string trimmer on wheels, so it’s a little easier to maintain a consistent height above ground level. When we tested the mower function, we found it easy to roll the trimmer back and forth but harder to keep it parallel to the ground for a truly consistent cut. The Worx is no match for the precision and evenness of a regular mower, but after we got used to it, the results weren’t too shabby. We don’t recommend using the Worx in this way for an entire lawn. But if you have an area that is difficult for a mower to get to (like between two raised beds), these added wheels might help you make a consistent cut (versus using the trimmer with no wheels). The height of the cut cannot be changed.
The Worx is powered by a 20-volt battery and has no problem with grass, but it struggled with thicker, stalkier weeds. It comes with a 2.0 Ah battery, which gave us a bit over 20 minutes of cutting time. The good news is that it’s easy to hear the motor bog down when it’s struggling. In these cases, we could try to cut the weeds down with a slower approach.
What impressed us the most about the Worx: its ergonomics. It was one of the smallest trimmers we tested, but it was the only one with a pivoting trimmer head. Worx touts this as a feature that makes trimming in tight spots—like under a picnic table—easier. But we found that it adds a whole new layer to the ergonomic adjustments and results in a trimmer that is comfortable to use, no matter the height of the person. With the combination of the adjustable trimmer head and the pivoting handle, a 6-foot 5-inch tester was able to use the Worx while standing perfectly straight. Conversely, someone on the shorter side of the spectrum can do the same.
The Worx also has a telescoping shaft, adding a further adjustment to accommodate for height (and to assist with storage). On other models, you can modify for user height only by adjusting the secondary handle on the shaft (if it has one, which many do not). These adjustments make it easier to share the trimmer among members of a household.
The Worx uses an auto-line feed feature. Most quality trimmers priced under about $175 have an auto-line feed system that releases about ¼ inch of line each time the trimmer is activated. As the motor starts up, the string is cut to the proper length by a small edge that hangs down from the underside of the debris guard. On the Worx, this process is barely noticeable. The motor kicks on at such a high speed that the line is trimmed almost instantly. So it’s nothing more than a whirrr followed by a quick little pop as the line is cut. The other trimmers we looked at all had slower motors, which resulted in a loud smacking noise as the string slapped against the cutter, until it reached cutting speed. This really sounds awful, and in one case, we actually thought the trimmer was broken. Trimming is such a start-stop activity that having to deal with a less-than-perfect auto-feed system got old really quickly.
We liked that the Worx maintained its quiet operation through the start-up and into regular use. The motor just whirls along, sounding like a high-pitched hair dryer. We’re not going to say it’s a pleasant sound, and we always wore ear protection. But the other models were all really loud, and their motors had an almost grindy quality to them.
A final touch that we appreciated was the little flower guard that sticks out at the front of the trimmer. This guard can be set to indicate the leading edge of the whirling string, so you can trim right up to—but not harm—your prized geraniums. It’s a nice feature—particularly for those who might not be used to handling a string trimmer.
The Worx does have some downsides that are worth noting. First, it uses proprietary pre-loaded line cartridges. The benefit is that they install quickly and easily (though with recent advances like Ego’s automatic system, the advantages of the pre-loaded line aren’t as significant as in the past). You also can’t simply invest $15 in what’s basically a lifetime supply of trimmer string. Also, if you’re in a pinch and need some immediately, there may be availability issues. We recommend getting a decent supply of extra spools. Worx sells them, and there appear to be a number of other brands selling compatible spools (we haven’t tested these and can’t vouch for them).
The other potential negative is that the Worx 20-volt battery system isn’t as widely available as some others, most notably Ryobi. Worx does have a selection of 20-volt saws, lights, and drills, among other tools, but we don’t have enough experience with them to pass judgement on them as a full system. Yet as much as we value consistent battery compatibility, we think $100 for a cordless trimmer that hits all the right points is a solid value (even if it means owning an additional battery and charger).
Also great: Echo SRM-225 String Trimmer
Despite all the benefits of a cordless model, in some rare situations a gas model will be the best option—namely for clearing large amounts of grass, either on a steep hillside or on a massive property that lacks a convenient place to recharge. For this kind of work, we recommend the Echo SRM-225 String Trimmer. It’s roughly the same price as the Ego ST1511S.
We tested the Echo in Los Angeles on a steep rear hillside (approximately 2,000 square feet), which Wirecutter senior editor Harry Sawyers has to clear every year before Southern California’s fire season. In spring 2016, he purchased the SRM-225 for the job, after trying (and returning) Echo’s lighter-duty curved-shaft model. The gas engine appealed to Harry at the time, and it’s still working perfectly after four years of intermittent heavy use and minimal maintenance. (But Harry said if he were shopping today, in spring 2021, he’d probably get a cordless tool instead.)
Here’s the appeal of a gas engine: With an ample supply of fuel and trimming line, you’ve got limitless run time for an all-day job, which is the reliable, durable Echo’s primary duty. This trimmer’s engine is as easy as any modern two-stroke engine to start. And Harry found he’d rather pay a slight premium for a can of premixed Trufuel 50:1 Mix Engineered Fuel+Oil than fuss with his own mixing ratios. The premix saves an additional trip to a gas station, and the can is stabilized and able to be stored at home for years.
The Echo is available at Home Depot, where it currently carries a 4.6 rating across nearly 7,000 customer reviews. We’ve been covering lawn equipment since 2013, and we can state that a rating this high, with this many reviews, on a gas-powered piece of outdoor equipment is extremely rare and likely indicates a unique level of quality. This model shares some problems common to any other gas trimmer—it’s super-loud, it vibrates your hands at full throttle, and it’s strong enough to kick all kinds of junk up into your face. Wear eye and ear protection, long pants, and gloves to be safe when using it.
The Ego ST1502-SA Power+ String Trimmer was previously our runner-up pick. It has similar capabilities to the other Ego trimmers, but it also has a manual line load, which is more tedious than what’s on the newer models. This trimmer is usually a little less expensive than the others, but not enough to make it a more appealing option.
In 2021, we tested two other smaller trimmers alongside the Worx, both typically priced under $125. The Ryobi P2030 18-Volt String Trimmer and Edger is very small and has none of the ergonomic adjustments that made the Worx so successful. The P2030 is very inexpensive, but we think the Worx is worth the extra investment. The Ryobi P2080 18-Volt String Trimmer/Edger has a telescoping shaft, but without the pivot at the trimmer head, its ergonomics are not as good as those of the Worx, especially for taller people. Neither of these models has the mini-mower function, and both of them are louder, particularly when the motor is first engaged.
In 2021, we also looked at the larger Ryobi P20120VNM 18-Volt Brushless String Trimmer. This is a solid trimmer, and it has a nice feel to it. But the motor is slow to get to full speed, resulting in an extremely loud slapping sound as the auto-feed line hits against the cutter. It’s such an unexpected noise that our testers thought the trimmer was broken. A nearby child said, “That thing sounds terrible. What is it?” Once the motor is at full speed and the line is cut, it’s still loud.
Ryobi has two other attachment-capable 40-volt models, but neither matches the power of our runner-up pick. The Ryobi RY40230 comes with a smaller battery; the RY40250 has a brushed motor, not the brushless one on our also-great pick, the RY40270. All three Ryobis are priced similarly, so we prefer the one with the larger battery and more-efficient motor, especially since it might be powering some of the more-draining attachments, like the cultivator.
String Trimmer Buying Guide
Black+Decker Craftsman Echo Ego Greenworks Husqvarna MTD Brands Ryobi Stihl Toro
Black+Decker is a leading manufacturer of corded- and cordless-electric string trimmers, and offers an extensive line of electric products. Black+Decker string trimmers are widely available online and at Home Depot, Lowe’s, and Walmart.
Craftsman products are made by a variety of manufacturers, and most have similar counterparts under different brand names. In the string trimmer market, Craftsman is a top brand. Its string trimmers are available with two- and four-stroke engines, and split-shaft designs for attachments. Craftsman products are sold at Sears and Kmart, and at sears.com, as well as select Ace Hardware stores and Lowe's.
Echo is the leading manufacturer of gas string trimmers and now also sells cordless-electric models. Its products are used in the consumer and professional market. Its string trimmers are available with two-cycle engines and split-shaft designs for attachments. Echo claims that some of its models offer low noise, emissions, and weight, along with anti-vibration features. Consumers can find Echo string trimmers at Echo dealer stores and Home Depot.
Ego is one of the larger manufacturers of battery-powered lawn tools, with some of the top models in CR's tests. After years of selling these products exclusively at Home Depot, Ego now sells at Lowe's. All of its tools, including its string trimmers, share a 56-volt battery platform, which is nice because if you buy multiple Ego tools, you'll always have a charged battery on hand.
Greenworks is a large manufacturer of electric lawn tools, including string trimmers, leaf blowers, lawn mowers, and chainsaws, the majority of which work on either a 60- or 80-volt battery platform. Greenworks sells through Home Depot, Lowe's, Walmart, Ace Hardware, and Tractor Supply.
Husqvarna makes a small line of gas string trimmers for the consumer and professional market. These string trimmers are available with two- and four-stroke engines, and many have split-shaft designs for attachments. You'll find Husqvarna string trimmers at Lowe's and dealer stores.
MTD makes electric and gas string trimmers and sells them under the Bolens, Cub Cadet, Troy-Bilt, Yard Machines, and Yard-Man brand names. MTD's diverse line of string trimmers includes corded- and cordless-electric types, models with two- and four-stroke engines, and split-shaft designs for attachments. MTD products are sold at a broad array of retailers, including Home Depot, Lowe's, Sears, Tractor Supply, and Walmart.
This Home Depot exclusive brand has a reputation for offering tools that are reasonably priced but offer good performance. In addition to lawn mowers, chainsaws, leaf blowers, and other outdoor tools, Ryobi is one of the only brands that makes all three kinds of string trimmers: corded, battery, and gas.
Stihl is a leading manufacturer of gas string trimmers with a small number of battery models. These premium-priced products are for consumers and pros. Stihl string trimmers are available with two- and four-stroke engines, and many of those gas models have split-shaft designs for attachments. Stihl claims some of its models have features that reduce noise, emissions, weight, and vibration. You'll find Stihl string trimmers at outdoor power equipment dealers.
Toro manufactures a line of small, lightweight, corded- and cordless-electric string trimmers sold through dealers and Home Depot.
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