Greenworks LM2108 21-inch 80V push mower kit review

What the LM2108 kit is—and what it is not

Greenworks identifies the exact U.S. machine as model LM2108, SKU 2550702 and internal model MO80L415: an 80V, 21-inch brushless push mower. This is the operator-propelled configuration, not the similar-looking LM2108S self-propelled family. The package page lists the mower, one 4.0Ah battery, a charger, a grass-catching bag and the owner’s manual. It calls the included charger a 4A rapid charger in the kit highlights. The mower joins Greenworks’ 80V battery system, but voltage alone does not make a Greenworks 40V or 60V pack interchangeable.

The exact page describes a steel 21-inch deck, LED headlights, folding handles and seven cutting-height positions from 1⅜ to 4 inches. Those are useful basics for a homeowner who wants a conventional push mower and prefers to start with a battery and charger in the box. The listed 62.8-pound product weight has no battery basis stated on the page, so do not use it as a ready-to-mow lifting weight. The deck measurement is the cutting path, not a complete outside dimension; measure the mower’s route through gates, turns and storage rather than treating a 21-inch opening as sufficient.

Three clipping routes, despite “4-in-1” wording

The linked MO80L415/LMB413 operator manual describes mulching, rear bagging and side discharge as the physical clipping configurations. It explains how to install the catcher, mulch plug and side-discharge chute, and it warns not to use the catcher together with the side-discharge chute. Greenworks markets the product as “4-in-1” and uses “Turbo Leaf Pickup” wording, but the manual’s own table lists the three clipping routes and defines Turbo as a temporary increase in cutting speed. That is not evidence of a fourth chute, vacuum or separate leaf-collection system. The exact package list clearly names the catcher but does not separately itemize the mulch plug or side chute, so confirm those parts in the delivered carton if one is essential to you.

In regular dry-grass maintenance, mulching avoids carrying clippings away when you can keep up with the lawn. Bag when collection matters; side discharge is another option where clippings can be left safely. The manufacturer’s page claims up to 38 minutes of runtime and up to a half-acre, but neither number is a measured guarantee for a particular lawn. Tall or dense grass, a low cut, repeated Turbo use, bagging conditions and the route all affect how much work a charge completes. The 4Ah label describes the supplied battery’s nominal capacity; it does not promise an acreage result.

Push control, the manual wording conflict and care

The current exact SKU page and product name call LM2108 a push mower. The linked manual cover identifies MO80L415/LMB413, and its control overview shows the power button and blade-activation lever, with no separate self-propel lever. Yet the manual’s generic introductory sentence calls the machine “self-propelled.” That internal wording conflicts with the exact package listing and the pictured control overview. For this exact SKU, the practical classification is push-only; do not buy it expecting powered wheel drive. If your delivered machine or included manual differs, match the label to SKU 2550702 before relying on a manual or ordering parts.

The manual says not to cut wet grass, limits slopes to 15 degrees, advises mowing across a slope rather than up and down, and calls for stable footing. After mowing, remove the battery before cleaning or service; keep water away from the battery compartment and never wash the battery or charger. The manual describes vertical storage after folding the handles, which may help in a cramped shed, but measure the space for the whole machine. The product page lists a four-year limited tool and battery warranty; that is manufacturer coverage subject to its written conditions, not a durability test.

When this exact configuration makes sense

Shortlist LM2108 if you want a push-only 21-inch mower, an included 4Ah battery and charger, and the choice among bagging, mulching or side discharge with the correct parts. It is a straightforward package rather than a powered-drive mower. The 80V LM2118 is another push configuration with one included 4Ah pack, but its exact LMB454 page documents two active battery ports and Auto-Switch behavior if a second compatible pack is added. LM2118S is not a synonym for this product: the open-box LM2118S package is self-propelled and includes two different-capacity packs, with a separate warranty ambiguity. If you need self-propulsion or two packs in the delivered kit, the LM2108 package does not meet that need. If you need a confirmed high-lift blade set, precise weight with battery, or a guaranteed acres-per-charge figure, the inspected LM2108 sources leave those points unresolved.

Manufacturer sources: Greenworks LM2108 / SKU 2550702 page, its linked MO80L415 operator manual, and the Greenworks recall register checked against the exact code.