EGO Power+ 21" Blade for Electric Lawn Mowers LM2101/LM2100/LM2102SP/LM2100SP/LM2142SP - AB2100

A mower is only as good as its blade. After a season of watching my EGO’s stock blade leave stragglers and push leaves around rather than lift them, I swapped in the EGO 21-inch blade. The difference showed up on the first pass: cleaner cut, stronger suction, and a bag that finally filled the way it should.

What it is and where it fits

This is a 21-inch, steel, 3-in-1 replacement blade designed for EGO’s 21-inch walk-behind mowers. It’s a genuine part, factory sharpened, and intended to handle mulching, bagging, and side discharge without any deck modifications. I ran it on an LM2100-series self-propelled unit, but it’s compatible across EGO’s 21-inch lineup. If you’ve been using the original blade that shipped with the mower, this is a simple swap—no adapters, no fuss.

Installation and setup

Fitting the blade is straightforward and took me just a few minutes:
- Remove the battery.
- Tip the mower back safely.
- Wear gloves.
- Use a socket to break the center bolt free.
- Note blade orientation: the “sail” (the curved, upswept edge) faces upward toward the deck.
- Reinstall, aligning the star pattern, and torque the bolt to the spec in your mower’s manual.

It’s worth stressing orientation. If the blade goes on upside down, you’ll lose lift and bagging performance entirely and may blame the mower. Installed correctly, the airflow difference is immediate.

Cutting performance

On a healthy, mixed fescue/bluegrass lawn, the cut was distinctly cleaner than with my well-worn stock blade. Grass tips looked sliced rather than torn, which reduces browning a day or two after mowing. I noticed fewer stragglers along turns and near edges, especially when running the deck at a mid-high setting.

In thick, late-spring growth that has stalled lesser blades, this one maintained speed and kept the motor from surging as often. I won’t pretend an electric mower suddenly behaves like a 160cc gas unit under load, but the blade’s profile clearly helps the deck move air more efficiently, which translates to better cutting consistency.

For damp conditions (the early-morning mow with a bit of dew), the blade stayed competent. It still pays to avoid fully wet grass to prevent clumping, but the deck stayed clearer longer than I expected, and I didn’t have to stop to scrape nearly as often.

Bagging and mulching

This is where the blade earns its keep. The increased lift is obvious:
- Bagging: Leaves, seed pods, and surface debris that the stock blade would skate over were drawn up and captured. My bag filled evenly from front to back, and I didn’t have to creep to coax clippings into the chute.
- Mulching: With a single pass at a responsible height-of-cut, clippings were better comminuted than with the baseline blade. There were fewer visible clumps, and the deck seemed to re-circulate material effectively until it was small enough to drop.

If your lawn has a tendency to lay over (taller, lush growth leaning from rain or foot traffic), the extra lift helps stand blades up for a more uniform cut. It’s still not the vacuum power of a commercial gas deck, but it’s much closer to that standard than the stock setup.

Noise and battery life

You don’t get more airflow for free. Running this blade costs a bit in noise and runtime:
- Sound: There’s a touch more whoosh and edge tone compared with the stock profile. It’s not remotely gas-mower loud, and I don’t feel a need for hearing protection, but the change is noticeable.
- Battery: Expect a modest hit to runtime, especially in thick turf. On my typical weekly cut, I saw the state of charge drop faster by a meaningful but acceptable margin. On heavier weeks or first-of-season cuts, I planned for a quick swap or a charge midway through the yard.

If you keep your lawn at a sensible height and mow regularly, the runtime penalty is small. If you often push into overgrown or damp conditions, you’ll appreciate the performance gain, but you’ll also notice the battery drain.

Build quality and longevity

The blade arrives straight and sharp. Balance felt good out of the box—no deck vibration at speed, which tells me the factory grind and temper are consistent. After several weeks, including a couple of runs over twig-littered turf, the edge held up well. Like any mower blade, it will dull with sand, soil contact, and hidden debris, so the usual rules apply:
- Avoid scalping; keep the deck high over uneven ground.
- Touch up the edge periodically with a file or a bench grinder.
- Check balance after sharpening; an unbalanced blade will stress the motor and bearings.

As a steel blade with a straightforward profile, this is easy to maintain. I’d rather replace than fight to restore an overly chewed edge; new blades cut cleaner and protect the mower by staying in balance.

Day-to-day usability

A few real-world notes from regular use:
- Height-of-cut: The increased lift lets me mow a notch higher without sacrificing finish quality. That’s healthier for the grass in summer heat.
- Pace: I don’t have to ride the self-propel as slowly to keep up with bagging. The chute stays clear unless I push into very wet clippings.
- Edges and turns: Because the blade stands grass up better, I get fewer missed blades along borders and around trees.
- Fall cleanup: This blade turns the mower into a credible leaf pickup tool. It won’t replace a dedicated vac, but it makes “mow-and-bag” leaf management realistic.

Who it’s for

Choose this blade if:
- You bag regularly and want better pickup of clippings and light leaf litter.
- Your stock blade leaves stragglers or fails to stand the grass up for a clean cut.
- You want one blade that does a solid job across mulching, bagging, and side discharge.

Consider alternatives or manage expectations if:
- Maximum runtime is your top priority; the extra lift costs some battery life.
- You mow infrequently and often tackle very overgrown or soaked grass. The blade helps, but it’s not a magic fix for extreme conditions.
- You’re extremely sensitive to deck noise; this blade adds a modest amount.

Tips for best results

• Keep it sharp. A quick touch-up every 10–12 hours of cutting makes a visible difference.
• Mow dry when possible. The blade handles dew, but drenched turf will still clump.
• Check the underside of the deck. A clean deck improves airflow; scrape built-up clippings periodically.
• Mind the orientation. Sail up. If bagging performance suddenly tanks, check that the blade hasn’t been installed upside down after maintenance.

The bottom line

The EGO 21-inch blade is a meaningful upgrade over the basic blade that shipped with my mower. It delivers a cleaner cut, stronger lift, and far better bagging behavior, with the predictable trade-offs of slightly more noise and a bit less runtime. It turns an already capable electric mower into something that feels closer to a gas unit in how it pulls grass upright and moves clippings through the chute.

Recommendation: I recommend this blade to most EGO 21-inch mower owners, particularly those who bag or who want a more polished finish in taller, denser lawns. The step-up in cut quality and pickup is worth the small hit to battery life, and installation is quick enough that there’s little reason not to try it. If you maximize runtime above all else, you may prefer a lower-lift profile, but for balanced, everyday mowing, this is the blade I’ll keep on my deck.