Compare Mowers
List prices are the manufacturer’s published figures, re-checked daily; they exclude tax, freight and dealer setup.
A side-by-side reference of each model's stated specifications. MowerFacts doesn’t give opinions: where a published, spec-derived rule can separate machines we mark a Data Pick and show the rule; here, read the values and decide what fits your needs.
Best suited for
What each model is built for, from its duty class and key specs. This is a neutral reference — MowerFacts does not rank one model above another.
- Wright Stander B 52 FS651E — commercial: daily paid use and high acreage; 52-inch deck; gas powered
- Wright Autonomous ZK 72 61G8 — commercial: daily paid use and high acreage; 72-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Stander B 52 FS651E holds 5 gal (18.9 L) of fuel; Autonomous ZK 72 61G8 holds 15.5 gal (58.7 L) of fuel, a 10.5 gal difference. Tank size bounds how long a machine runs between stops. Consumption varies with engine, load and speed, so hours per tank are not fixed.
- Stander B 52 FS651E has a 22 hp engine; Autonomous ZK 72 61G8 has a 40 hp engine, a 18 hp difference. Published horsepower is the maker's rating at a stated engine speed. It is a different measure from displacement, and two engines of equal rating can pull differently.
- Stander B 52 FS651E uses a Kawasaki engine; Autonomous ZK 72 61G8 uses a Briggs & Stratton engine. The engine maker builds the engine; the mower maker chooses the model, rating and fit, so the badge alone does not settle output or longevity.
- Stander B 52 FS651E has a published top speed of 7 mph; Autonomous ZK 72 61G8 has a published top speed of 12.5 mph, a 5.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- Stander B 52 FS651E has a 52 in (1,321 mm) deck; Autonomous ZK 72 61G8 has a 72 in (1,829 mm) deck, a 20 in difference. Deck width sets how much grass each pass covers. Mowing time also depends on ground speed, turns and obstacles, so a wider deck alone does not fix the job's length. Time both decks on your own lawn ›
5 more differences, calculated figures
Other verified differences
- Stander B 52 FS651E weighs 800 lbs (362.9 kg); Autonomous ZK 72 61G8 weighs 1,201 lbs (544.8 kg), a 401 lbs difference.
- Stander B 52 FS651E has a Floating-side discharge deck; Autonomous ZK 72 61G8 has a Floating-Mulch deck.
- Stander B 52 FS651E has a 11 Gauge deck; Autonomous ZK 72 61G8 has a 7 Gauge deck.
- Stander B 52 FS651E has a 44.3 ci (726 cc) engine; Autonomous ZK 72 61G8 has a 60.6 ci (993 cc) engine, a 16.3 ci difference.
- Stander B 52 FS651E cuts from 2 in (51 mm) to 5 in (127 mm); Autonomous ZK 72 61G8 cuts from 1.5 in (38 mm) to 5.5 in (140 mm).
Calculated by MowerFacts
- Stander B 52 FS651E works out to 2.9 acres/hour; Autonomous ZK 72 61G8 works out to 7.3 acres/hour, a 4.3 acres/hour difference. Calculated by MowerFacts from deck width and the published top speed at 80% efficiency; it is not a manufacturer figure, and real mowing is slower.
Verified means each manufacturer publishes the figure. A bigger number is only a bigger number; nothing here says which machine is better. The full specification table is below.
Which is faster on your property? › Measure your lawn once and MowerFacts times all 2 against it.
| Spec | Stander B 52 FS651E Wright · Commercial |
Autonomous ZK 72 61G8 Wright · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Briggs & Stratton |
| Displacement | 44.3 ci (726 cc) | 60.6 ci (993 cc) |
| Engine Power | 22 hp | 40 hp |
| Engine Model | FS651E | 61G8 |
| Fuel Type | Gasoline | Gasoline |
| Start Type | Electric | Electric |
| Deck | ||
| Cutting Width | 52 in (1321 mm) | 72 in (1829 mm) |
| Blades | 3 | 3 |
| Deck Material | 11 Gauge | 7 Gauge |
| Deck Construction | Floating-side discharge | Floating-Mulch |
| Deck Gauge | 11 | 7 |
| Min Cut Height | 2 in (51 mm) | 1.5 in (38 mm) |
| Max Cut Height | 5 in (127 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | Hydro | Hydro |
| Ground Speed | 7 mph | 12.5 mph |
| Reverse Speed | 3 mph | 7 mph |
| Dimensions | ||
| Weight | 800 lbs (362.9 kg) | 1201 lbs (544.8 kg) |
| Fuel Capacity | 5 gal (18.9 L) | 15.5 gal (58.7 L) |
| Length | 65.7 in (1670 mm) | 72 in (1829 mm) |
| Width | 53 in (1346 mm) | — |
Where these models differ, explained
Stander B 52 FS651E: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kawasakienginesusa.com.
Autonomous ZK 72 61G8: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — wrightmfg.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.