Ariens RAZOR 21 REFLEX SELF PROPELLED
Push / Walk-Behind mower · Model 911609 · Residential-duty · Gas
The Ariens RAZOR 21 REFLEX SELF PROPELLED is a residential-grade gas walk-behind mower, suited to small-to-mid home lawns, with a 21-inch deck and a 163cc engine. It weighs 78 lb (35.4 kg).
At a glance
Power Source
gas
Cutting Width
21 in (533 mm)
Displacement
9.9 ci (163 cc)
Weight
78 lbs (35.4 kg)
Engine
| Power Source | gas |
|---|---|
| Displacement | 9.9 ci (163 cc) |
| Engine Make | Briggs & Stratton EXi 725 |
Deck
| Cutting Width | 21 in (533 mm) |
|---|---|
| Min Cut Height | 1 in (25 mm) |
| Max Cut Height | 4 in (102 mm) |
| Blades | 1 |
| Blade Tip Speed | 17001 ft/min (5182 m/min) |
| Cut Positions | 7 |
Drive
| Drive System | General Transmission® MA 302 |
|---|---|
| Ground Speed | 4 mph |
Dimensions
| Weight | 78 lbs (35.4 kg) |
|---|---|
| Fuel Capacity | 0.3 gal (1.1 L) |
General
| Warranty | 4 yr |
|---|
Similar models
Other push / walk-behind mowers with comparable specs — including other brands — that buyers cross-shop with the RAZOR 21 REFLEX SELF PROPELLED.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — ariens.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
Source: Ariens (manufacturer) · archived copy