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BLACK+DECKER String Trimmer with Auto Feed, Electric, 6.5-Amp, 14-Inch (BESTA510)

TLDR Review: BLACK+DECKER BESTA510 Trimmer

By ShopSavvy Team

Published: February 21st, 2026

Pros

•Lightweight yet powerful, delivering strong cutting performance that often beats competitors like Ryobi.
•Consistent cutting power effective on tall grass, tough weeds, and even some hedge trimming.
•Reliable corded electric power means no worries about battery life or charging delays.
•Automatic line feed simplifies operation, reducing the hassle of manual line replacement.
•Easy assembly and straightforward use right out of the box, with helpful owner’s manual tips.
•The edger wheel doubles as a protective guide, preventing line damage from fences or obstacles.
•Replacement spools are easy to swap and readily available, including cheaper ofrand options.
•Made in the USA, which adds to its perceived build quality and durability.
•Lightweight and welalanced, making it comfortable for extended use.
•Starts quickly without fuss and is generally reliable.

Cons

•Automatic line feed can initially feed line too quickly, causing line waste unless modified with a small coil spring on the lever.
•The cord retainer is sometimes unreliable, requiring users to manually loop the cord plug through a handle slot for a secure hold.
•Large diameter extension cord plugs may need minor trimming of the handle recess to fit properly.
•Uses only a single cutting string that tends to wear out quickly, leading to frequent restringing.
•Original line length from the spool may run out halfway through mediuized lawns, increasing line consumption over time.
•While generally reliable, some users have experienced issues with the automatic feed on older models.
•The trimmer is not rust resistant and has a plastic housing, which could affect lonerm durability in harsh conditions.

Bottom Line

The BLACK+DECKER BESTA510 is a lightweight, powerful, and easy-to-use corded string trimmer ideal for homeowners who want dependable trimming and edging without dealing with battery hassles. Its automatic feed and edger wheel make yard work efficient, though some minor tweaks may be needed to perfect line feeding and cord management. Frequent restringing is a trade-off for its single-line design, but overall, it offers strong cutting performance and reliability at an affordable price. If you want cordless convenience or a dual-line system to reduce restringing frequency, you might want to explore other options, but for steady power and ease of use, this model holds up well.

Lowest at Amazon

$55.01 at Amazon

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 73 retailers to give you the short version.