Greenworks 40V Weed Wacker Lineup: Quick Buyer’s Guide

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Choosing a greenworks weed wacker 40v model requires evaluating cutting swath, line diameter, motor efficiency, and attachment flexibility against your property size. Homeowners managing compact suburban lots often need lightweight maneuverability and integrated edging guides for sidewalk borders, whereas property owners with half-acre lots or dense perimeter overgrowth need high-torque brushless motors and thicker dual cutting lines. Selecting the wrong configuration leads to premature line breakage or arm strain from unnecessary tool bulk. Comparing line feed mechanics and battery pairings prevents wasted spending.

Greenworks organizes its 40V lineup into three clear performance brackets: entry auto-feed trimmers, mid-range high-torque workhorses, and commercial-grade brushless tools with attachment-capable shafts. Compact 12-inch and 13-inch models focus on single-line auto-feed operation and bundled leaf blowers for fast sidewalk clearing. Stepping up to 15, 16, and 17-inch platforms introduces dual-line bump-feed heads, thicker gauges, and TruBrushless motors built for dense vegetation. For homeowners considering a jump from a smaller greenworks 24v trimmer, this greenworks 40v weed wacker comparison clarifies which greenworks weed wacker to buy for your yard profile.

Criteria matrix What each model in this report is credited with

Rows are the criteria that come up in the pros and cons listed for this lineup. A check means the criterion is named in this report’s write-up of that model; a dash means it is not. Criteria that apply to every model, or to only one, are left out because they separate nothing.

Criterion	12 in String Trimmer 8.0/10	13 in Cordless String 8.6/10	15 in Cordless String 8.8/10	16 in String Trimmer 9.2/10	17 in Cordless String 8.4/10	16 in Cordless String 9.0/10
Ah battery	✓Named	✓Named	✓Named	✓Named	✓Named	Not named
Bump feed head	Not named	Not named	✓Named	Not named	✓Named	✓Named
Variable-speed trigger	Not named	Not named	✓Named	Not named	✓Named	✓Named
Brushless motor	Not named	Not named	✓Named	✓Named	✓Named	Not named
Cutting path	Not named	Not named	✓Named	✓Named	Not named	✓Named
Battery and charger	Not named	Not named	✓Named	✓Named	Not named	Not named
TruBrushless motor	Not named	Not named	Not named	✓Named	Not named	✓Named
Dual-line bump	Not named	Not named	✓Named	Not named	Not named	✓Named
Criteria named	1 / 8	1 / 8	7 / 8	5 / 8	4 / 8	5 / 8

Built from the wording of this report, not from a bench test. A dash is not a fault: it only means the write-up does not mention that point for that model. Scores next to each model are out of 10, based on listed specifications and buyer feedback.

Greenworks Weed Wackers Lineup at a Glance

The Models in Detail

Greenworks 40V 12 in String Trimmer

Best for: Suburban yard cleanup and walkway blowing

Pros

• Includes 390 CFM leaf blower
• Whisper-quiet 67dB operation
• Lightweight 8-pound balanced build

Cons

• Thinner 0.065-inch single line
• Fixed 12-inch cutting width

The Greenworks 40V 12 in String Trimmer is bundled with an axial leaf blower as an integrated walkway clearing system. Designed for light perimeter grooming, the trimmer delivers a 12-inch cutting swath powered by an auto-feed head spinning 0.065-inch line. Greenworks indicates that the commercial-grade head slices through weeds up to one inch thick and carries a 3-year head warranty. The tool features an 8-pound balanced profile, operates at a whisper-quiet 67 decibels, and is thirty percent lighter than comparable gas units.

The bundled blower outputs 390 CFM at 110 MPH with cruise control for clearing wet leaves and hard surfaces. Power is delivered by an included 2.0 Ah battery that recharges in 60 minutes, while the total package weight is 16.5 pounds. This package fits homeowners wanting a rapid trim-and-sweep combo for small suburban driveways, flower beds, and patio perimeters without gas maintenance. However, it concedes cutting width and line thickness to the 13-inch and 15-inch trimmers when clearing taller, woody weed patches.

Greenworks 40V 13 in Cordless String

Best for: Homeowners needing precision sidewalk curb edging

Pros

• 7-position pivoting trimmer head
• Integrated steel edging guide
• Telescoping shaft fits diverse heights

Cons

• Limited to 0.065-inch line
• Not designed for thick brush

The Greenworks 40V 13 in Cordless String trimmer operates as a dedicated two-in-one trimmer and edger designed for clean lawn borders. It incorporates a 7-position pivoting head and a steel edging guide, enabling operators to switch between flat trimming and vertical edging in three clicks. Running at 9000 RPM, the 13-inch swath relies on 0.065-inch auto-feed line rated to tackle 1.5-inch weeds. Ergonomic adjustments include a telescoping shaft extending from 40 to 52 inches for operators between 5’2″ and 6’4″, paired with a 7-position handle.

Generating 78 decibels of noise, this 40V string trimmer weighs 5.18 pounds as a bare tool and 6.9 pounds fully assembled. While property owners seeking dedicated edging tools sometimes look into the worx weed wacker for compact lawn trimming, this Greenworks model includes a 2.0 Ah battery providing an average run time of 40 minutes. It suits homeowners who prioritize precise curb edging and adjustable ergonomics, but it steps aside for dual-line models when tackling large, tangled properties.

Greenworks 40V 15 in Cordless String

Best for: Half-acre properties tackling stubborn weed patches

Pros

• TORQDRIVE system adds 30% torque
• Dual-line bump feed head
• Variable-speed trigger control

Cons

• Weighs 12.3 pounds
• Non-expandable solid shaft

The Greenworks 40V 15 in Cordless String, cataloged under model number greenworks st40b213, is engineered for homeowners who need greater torque and cutting coverage. Featuring a 15-inch cutting path, the trimmer employs Greenworks TORQDRIVE technology, delivering 30 percent more torque through dense weeds and overgrown grass. It spins at 5500 RPM and upgrades line management to a dual-line bump feed head accepting 0.080-inch and 0.085-inch line. A two-speed selector switch and variable-speed trigger grant precision throttle control around delicate landscaping plants and shrubs.

Weighing 12.3 pounds, the trimmer includes a 2.0 Ah battery and charger, with manufacturer ratings indicating coverage for properties up to one-half acre. The battery provides fade-free power with push-button starting, eliminating spark plugs and pull cords. This model suits owners of mid-sized suburban lawns seeking heavier dual-line performance to clear dense turf quickly. It yields to the 16-inch and 17-inch options when users demand brushless motor efficiency or attachment-capable split shafts for multi-tool yard care.

Greenworks 40V 16 in String Trimmer

Best for: Current 40V owners needing multi-tool versatility

Pros

• TruBrushless motor technology
• Accepts five PAC-series attachments
• Heavy-duty 0.095-inch dual line

Cons

• Battery and charger not included
• Attachments sold separately

Best for: Large yards needing trimming and heavy blowing

Pros

• High-output 550 CFM blower included
• Brushless motor with 16-inch swath
• High-capacity 4.0 Ah battery

Cons

• Heavier 22.3-pound combo package
• Requires two-hand blower storage

The Greenworks 40V 16 in String Trimmer combo kit combines a commercial-width string trimmer with a 550 CFM axial blower. Powered by a brushless motor running at 6000 RPM, the trimmer offers longer motor life, extended runtimes, and reduced internal friction. The wide 16-inch cutting path decreases trimming time along driveways, fence lines, and flower beds. The listing highlights an attachment-capable split shaft, allowing users to adapt the powerhead to other yard maintenance tasks.

Greenworks bundles this package with a 4.0 Ah battery providing an average life of 50 minutes, paired with a blower delivering 550 CFM at 130 MPH for clearing hardscapes and heavy debris. The entire kit weighs 22.3 pounds. While operators comparing expandable platforms might also investigate a makita weed wacker, this Greenworks combo serves large suburban properties needing high-volume debris clearing and broad trimming passes. It yields to the 17-inch model when slicing through thick, woody brush requiring commercial 0.105-inch line.

Greenworks 40V 17 in Cordless String

Best for: Acreage owners clearing dense woody brush

Pros

• Wide 17-inch cutting path
• Thick 0.105-inch dual line
• Rapid 50-minute 6A charger

Cons

• Oversized for small manicured yards
• Non-attachment shaft design

The Greenworks 40V 17 in Cordless String, model ST40L510-00, provides the widest cutting swath in the brand’s 40V cordless family. Powered by a high-efficiency brushless motor delivering 25 percent more torque at 6000 RPM, it drives heavy-gauge 0.105-inch dual line to slice through woody stems, dense brush, and wet tangled grass. It features a variable-speed trigger to balance runtime against cutting power, while the Load-N-Go bump feed head reloads line in seconds without requiring tool disassembly.

The bare tool weighs 7 pounds (7.1 pounds total listed weight), making it thirty percent lighter than gas trimmers. Greenworks includes a 5.0 Ah battery offering 50 minutes of runtime and a 6-amp rapid charger that recharges the battery in 50 minutes. This trimmer suits acreage owners and property managers confronting thick vegetation and ditch overgrowth. However, its broad 17-inch sweep and heavy line gauge represent more machine than necessary for small, manicured yards.

Greenworks 40V 16 in Cordless String

The Greenworks 40V 16 in Cordless String trimmer, identified as model greenworks st40l03, is offered as a bare tool for existing 40V battery owners. Equipped with a TruBrushless motor spinning at 6000 RPM, it maximizes operational torque and motor lifespan while reducing vibration. The 16-inch cutting path utilizes a dual-line bump feed head with 0.095-inch line and easy-wind reloading. A two-speed selector paired with a variable-speed trigger ensures precise throttle regulation across sidewalks, driveways, and fence borders.

The defining feature of the ST40L03 is its modular attachment-capable shaft. It connects directly with Greenworks attachments, including the PAC458 edger, PAC459 hedge trimmer, PAC460 pole saw, PAC461 cultivator, and PAC462 blower. Weighing 11.3 pounds, it is 25 percent lighter than gas trimmers. This model is the best greenworks 40v weed eater configuration for homeowners who already own 40V batteries and want a versatile, multi-attachment yard system without purchasing redundant batteries or chargers.

Matching a Model to Your Setup

• For small suburban yards needing light trimming and immediate walkway blowing: Greenworks 40V 12 in String Trimmer provides an 8-pound balanced build, a quiet 67-decibel sound rating, and an included 390 CFM blower.
• For townhomes and landscaped beds requiring sharp curb edging: Greenworks 40V 13 in Cordless String features a 7-position pivoting head, a steel edging guide, and a telescoping shaft adjusting from 40 to 52 inches.
• For half-acre suburban lawns with dense patches of stubborn weeds: Greenworks 40V 15 in Cordless String offers TORQDRIVE gearing, a 15-inch swath, and 0.085-inch dual line to tackle heavy turf.
• For large properties requiring extended runtime and heavy leaf clearing: Greenworks 40V 16 in String Trimmer combo kit includes a brushless motor, a 4.0 Ah battery, and a high-volume 550 CFM blower.
• For rough acreage, woody stems, and wet ditch overgrowth: Greenworks 40V 17 in Cordless String delivers a 17-inch path, commercial 0.105-inch line, and a 5.0 Ah battery with 50-minute fast charging.
• For existing 40V system owners wanting multi-tool versatility: Greenworks 40V 16 in Cordless String bare tool supports five PAC-series attachments on a durable TruBrushless powerhead.

Before You Buy

Before selecting a trimmer, verify the exact equipment included in the box. Several models, such as the 16-inch ST40L03, are sold as bare tools and do not include a 40V battery or charging station. In contrast, combo packages include batteries ranging from compact 2.0 Ah packs on entry kits to 4.0 Ah and 5.0 Ah batteries with rapid chargers on heavy-duty units. Spool styles and line thicknesses also differ substantially across the line: entry models use 0.065-inch single line, mid-tier units run 0.080-inch or 0.085-inch dual line, and heavy-duty models use 0.095-inch or 0.105-inch line.

Take note of details the listings do not include or do not specify. The manufacturer listings do not specify universal compatibility between Greenworks attachment-capable shafts and attachments produced by competing brands, confirming fitment only with Greenworks PAC-series accessories. Furthermore, while the listings cite average runtimes of 40 to 50 minutes under typical trimming conditions, they do not specify runtime under continuous maximum-throttle use in thick, woody brush. If you are comparing battery platforms across different manufacturers, reviewing cordless ecosystems such as our litheli weed wacker guide provides additional perspective on cordless battery runtimes and equipment weights.

FAQ

Are Greenworks 40V batteries interchangeable across all trimmers?

Yes, all trimmers featured in this guide operate within the Greenworks 40V ecosystem. Whether your tool came with a 2.0 Ah, 4.0 Ah, or 5.0 Ah battery, the physical battery mount and voltage output are compatible across every 40V Greenworks trimmer and blower.

What is the functional difference between auto-feed and bump-feed trimmer heads?

Auto-feed heads automatically release fresh 0.065-inch line each time the motor trigger is released and pulled, preventing manual line adjustment. Bump-feed heads require the operator to tap the spinning head against the turf, giving precise control over line advancement when utilizing thicker dual line.

Can the Greenworks ST40L03 attachment-capable trimmer accept attachments from other brands?

The product listing specifies compatibility strictly with Greenworks PAC-series attachments, such as the PAC458 edger, PAC459 hedge trimmer, PAC460 pole saw, PAC461 cultivator, and PAC462 blower. The listing does not specify whether third-party universal attachments will fit the drive coupling.

How long does it take to recharge the included 40V batteries?

Recharging duration depends on the battery capacity and charger model supplied. The 2.0 Ah battery included with the 12-inch trimmer takes approximately 60 minutes on its standard charger, whereas the 5.0 Ah battery bundled with the 17-inch trimmer recharges in 50 minutes using its included 6-amp fast charger.

Which Greenworks 40V trimmer is best suited for cutting thick brush and woody weeds?

The Greenworks 40V 17 in Cordless String trimmer is best equipped for dense brush, utilizing a commercial-grade 0.105-inch dual line, a Load-N-Go bump feed head, and a brushless motor delivering 25 percent more torque.