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21-Inch Battery Powered Walk-Behind Lawn Mower
- Mfg.#
- RMA 510 SET
- Sku#
- 3660750
- 21-Inch Steel Mowing Deck - Users can trust that the steel mowing deck will provide more durability than a plastic alternative.
- Convenient Handle - Not only is the handlebar is easily adjustable for user comfort, it also folds making it easy to transport and store the mower.
- Brushless Motor - The advanced brushless motor virtually eliminates maintenance while supplying the power and performance you expect from STIHL.
- Ball Bearing Wheels - The sealed ball bearing wheels are designed for long life.
- Multiple Storage Options - The mower can be stowed in three positions: folded on all four wheels, unfolded on all four wheels, or upright and folded in the cleaning position with blades facing the wall to save floor space.
* Estimated stock levels as of Sat, Apr 11, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.
Description
The RMA 510 gives homeowners the performance of a gasoline-powered mower without any of the hassles. Enjoy instant starting, less noise, zero gasoline costs, and zero exhaust emissions. It features a 21" steel mowing deck, so you can cover more lawn faster than previous models. The RMA 510 also includes a holding slot for a second battery, so you can swap batteries and be ready to cut again in seconds. It also features an adjustable handlebar, grass catcher, and large rear wheels for rough terrain. This battery-powered lawn mower is great for small to medium suburban yards.
Read Owners Manual for extended warnings and directions prior to use.
Specifications
General
| Battery System | AP System |
|---|---|
| Catcher Capacity | 19.8 gal. |
| Coverage | 3,616 sq. ft. |
| Cutting Height | 1.4" – 3.5" |
| Deck Width | 21 in. |
| Includes | Walk-Behind Lawn Mower, AP 300 S Battery And AL 101 Charger |
| Power Source | Battery |
| Self Propelled | No |
| Type | Walk-Behind Lawn Mower |
Dimensions
| Cutting Path | 20 in. |
|---|---|
| Weight | 59.5 lbs. |
Manufacturing Details
The following information is subject to change without notice
| Manufacturer Warranty | 3 Years |
|---|---|
| Prop 65 Warning |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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Label Information
| Precautionary Statement | CAUTION: This lawn mower is a high speed cutting tool and is battery powered, some special safety precautions must be observed to reduce risk of personal injury. Careless or improper use may cause serious or even fatal injury, including amputation of hands and feet. |
|---|
Videos
Related Documents
Brochure (PDF)
Warranty (PDF)
