EGO STA1600 String Trimmer Attachment Review

The EGO STA1600 is a 16-inch carbon-fiber string trimmer attachment designed for the EGO POWER+ Multi-Head system. It is not a standalone trimmer — instead, it connects to a compatible EGO power head (such as the PH1400 or PH1420), which supplies the motor power while the attachment performs grass trimming and edging tasks.

Features

Specifications

Specification	Details
Model	STA1600 String Trimmer Attachment
System Type	EGO POWER+ Multi-Head attachment
Cutting Width	40 cm (16 in.)
Cutting Mechanism	Bump-feed trimmer head (Rapid Reload / POWERLOAD™ compatible)
Line Diameter	2.4 mm (0.095 in.) dual spiral-twist nylon line
Maximum Speed	4900 / 5800 RPM
Shaft Material	Carbon fiber (lifetime warranty)
Shaft Type	Straight shaft design
Line Loading System	POWERLOAD™ (PH1420) or Rapid Reload (PH1400)
Weather Resistance	IPX4 splash-resistant construction
Attachment Compatibility	EGO PH1400, PH1420, PHX1600 Power Heads
Weight (Attachment Only)	≈1.53 kg (3.4 lbs)
Total Length	Approx. 88 cm attachment length
Warranty	5-year limited consumer warranty

Material of Build

The EGO STA1600 is built using a combination of carbon fiber, high-strength steel, and reinforced engineering plastics, each chosen to balance durability, weight, and long-term reliability. The main outer shaft is made from carbon fiber, which provides excellent strength while keeping the attachment lightweight and resistant to corrosion, bending, and vibration during operation.

Internally, the power-transferring components such as the drive shaft and gearbox parts are constructed from hardened steel, ensuring strong torque delivery and long service life under continuous use. The trimmer head, guard, and housing components are made from impact-resistant reinforced polymer, designed to withstand debris impact, outdoor weather exposure, and everyday wear while keeping overall weight manageable and comfortable for extended trimming sessions.

Comfort and Ease of Use

The EGO STA1600 is designed with user comfort as a priority, starting with its lightweight construction and balanced straight-shaft layout. Weighing about 1.53 kg (3.37 lbs) without battery, the attachment feels easy to maneuver compared to heavier trimmer setups, reducing strain during longer trimming sessions. The carbon-fiber shaft helps keep overall weight low while maintaining strength, allowing users to work longer without excessive arm fatigue.

Another key comfort advantage comes from reduced vibration and ergonomic handling. Measured vibration levels are relatively low at the handles, which helps minimize hand and wrist fatigue during operation. Combined with the balanced design and smooth bump-feed system, the trimmer feels stable and controlled while edging or trimming around obstacles, making it easier for both regular homeowners and frequent users to maintain accuracy and comfort throughout the job.

Two Ways to Load Trimmer Line

The EGO STA1600 offers two different methods for loading trimmer line, giving users flexibility depending on the power head they use. The first method is POWERLOAD™ automatic line loading, available when the attachment is paired with the PH1420 power head. With this system, you simply insert the line through the trimmer head and press a button, and the head automatically winds the line evenly, removing the need for manual winding.

The second method is the Rapid Reload manual system, which works with both the PH1400 and PH1420 power heads. In this method, you align the arrows on the trimmer head, insert the line straight through, and twist the head by hand to wind the line quickly. This manual option is simple and reliable, ensuring the attachment remains easy to use even without the automatic POWERLOAD™ feature.

Cutting Performance

The EGO STA1600 delivers strong cutting performance thanks to its combination of a wide cutting path, high rotational speed, and dual-line trimming system. It features a 16-inch (40 cm) cutting swath, allowing you to trim more grass in a single pass, which noticeably reduces working time on medium and large yards. The attachment uses a 2.4 mm (0.095″) dual nylon twist line, designed to produce clean, consistent cuts while maintaining durability against thicker grass and light weeds.

Performance is driven by high cutting speeds reaching approximately 4900–5800 RPM, delivering enough power for dense grass and overgrown edges when paired with an EGO multi-head power unit. In real-world use, the wide swath combined with fast line speed allows smooth trimming without frequent slowdowns, helping maintain even results around fences, sidewalks, and landscaping areas.

Bump-feed head

The EGO STA1600 uses a bump-feed trimmer head, which is one of the most common and practical line-feeding systems used on modern string trimmers. A bump-feed head automatically releases more cutting line while you work — simply by lightly tapping (or “bumping”) the bottom of the trimmer head on the ground during operation. This allows fresh line to extend without stopping the tool or turning it off.

Inside the head, a spring-loaded mechanism releases a small amount of line when bumped, while centrifugal force spins the line outward for cutting. As the nylon line wears down during trimming, you just tap the head briefly and continue working, keeping the cutting length optimal at all times. The STA1600’s head uses a dual-line bump-feed system, meaning two lines advance evenly for balanced cutting performance and smoother operation.

Compatibility with the EGO Multi-Head System

The STA1600 is officially compatible with two EGO power heads: the PH1400 and the newer PH1420. Both power heads can drive the trimmer normally, providing full cutting performance and allowing the attachment to function as a standard string trimmer. EGO designs all multi-head attachments to connect securely through the same coupling system, ensuring stable operation and consistent power delivery during use.

When used with the PH1420 power head, the STA1600 unlocks its full feature set, including the advanced POWERLOAD™ automatic line-loading system. This feature uses electrical contacts inside the newer power head to automatically wind trimmer line at the press of a button, dramatically simplifying maintenance. With the older PH1400, trimming performance remains normal, but POWERLOAD™ is disabled and line must be loaded manually using the Rapid Reload system instead.

Value for money

The EGO STA1600 offers very good value for money because it combines premium materials and practical features that directly improve everyday use. The carbon-fiber shaft makes the attachment lighter and more durable than many standard trimmer attachments, while the wide 16-inch cutting swath helps complete trimming jobs faster. Features like easy line loading and reduced vibration also add real convenience, meaning you spend less time dealing with maintenance and more time working efficiently.

Its value becomes even stronger when used as part of the EGO multi-head system. Instead of buying several separate tools, one power head can operate multiple attachments, saving space and long-term equipment costs. For users who trim regularly or maintain medium to large yards, the durability, comfort, and versatility of the STA1600 make it a smart long-term investment rather than just a simple accessory.

EGO STA1600 Vs STA1500

Final Thoughts

The EGO STA1600 represents a thoughtful evolution of the traditional string trimmer attachment. By combining advanced materials, modern convenience features, and strong cutting performance, it offers a trimming experience that feels both powerful and easy to manage.

For users looking for durability, comfort, and long-term flexibility within a cordless system, the STA1600 stands as one of the most refined options available. It delivers reliable performance while reducing the common frustrations associated with older trimming tools, making lawn care simpler and more enjoyable overall.

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