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21-Inch AK Series Self-Propelled Walk-Behind Mower, Mower Only
- Mfg.#
- RMA 510 V
- Sku#
- 3661121
- The self-propel function features a variable-speed setting control, reducing user fatigue by offering choices of mowing speeds.
- Users can trust that the steel mowing deck will provide more durability than a plastic alternative.
- Not only is the handlebar is easily adjustable for user comfort, it also folds making it easy to transport and store the mower.
- The advanced brushless motor virtually eliminates maintenance while supplying the power and performance you expect from STIHL.
- The sealed ball bearing wheels are designed for long life.
* Estimated stock levels as of Fri, Jul 10, 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
Just the squeeze of a lever engages the RMA 510 V battery-powered lawn mower’s efficiency-driven performance, helping reduce fatigue commonly caused by traditional push mowers. A 21-inch steel mowing deck with a 20-inch cutting width makes the RMA 510 V highly maneuverable and able to quickly cover small-to-medium size yards. The mower’s self-propel function features a variable-speed setting control, allowing choices of mowing speeds between 0.6 mph and 2.8 mph. With the 36-volt STIHL AP 300 S battery, the RMA 510 V can mow up to 3,078 square feet On A Single Charge™.* With battery, enjoy instant starting, low noise, zero gasoline costs, and zero exhaust emissions. For added convenience and customization, the deck of the RMA 510 V is adjustable to seven different cutting heights, and the handlebar adjusts to three height positions. Durable, ten-inch rear wheels and eight-inch front ball-bearing wheels allow for mowing over rough terrain.
Read Owners Manual for extended warnings and directions prior to use.
Specifications
General
| Cutting height, max (approximate) | 3.9 in |
|---|---|
| Cutting height, min (approximate) | 1 in |
| Deck Width | 21 in |
| Grass Bag Capacity | 19.8 gal |
| Item Weight | 63.9 lbs |
| Number of Settings | 7 |
| RPM | 3200 |
| Self Propelled | Yes |
| Type | Push Mower |
Dimensions
| Cutting Path | 20 in |
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Manufacturing Details
The following information is subject to change without notice
| Prop 65 Warning |
WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
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Related Documents
InstructionsPDF (PDF)
