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 ZK 61 FX820 — commercial: daily paid use and high acreage; 61-inch deck; gas powered
- Wright Autonomous ZK 61 61G8 — commercial: daily paid use and high acreage; 61-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Stander ZK 61 FX820 uses a Kawasaki engine; Autonomous ZK 61 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 ZK 61 FX820 has a Floating-side discharge deck; Autonomous ZK 61 61G8 has a Floating-Mulch deck.
- Stander ZK 61 FX820 has a 34.5 hp engine; Autonomous ZK 61 61G8 has a 40 hp engine, a 5.5 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 ZK 61 FX820 has a 50.2 ci (822 cc) engine; Autonomous ZK 61 61G8 has a 60.6 ci (993 cc) engine, a 10.4 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
- Stander ZK 61 FX820 weighs 1,160 lbs (526.2 kg); Autonomous ZK 61 61G8 weighs 1,310 lbs (594.2 kg), a 150 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Stander ZK 61 FX820's weight means for a trailer ›
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 ZK 61 FX820 Wright · Commercial |
Autonomous ZK 61 61G8 Wright · Commercial |
|---|---|---|
| List price | dealer quote | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki | Briggs & Stratton |
| Displacement | 50.2 ci (822 cc) | 60.6 ci (993 cc) |
| Engine Power | 34.5 hp | 40 hp |
| Engine Model | FX820 | 61G8 |
| Fuel Type | Gasoline | Gasoline |
| Start Type | Electric | Electric |
| Deck | ||
| Cutting Width | 61 in (1549 mm) | 61 in (1549 mm) |
| Blades | 3 | 3 |
| Deck Material | 7 Gauge | 7 Gauge |
| Deck Construction | Floating-side discharge | Floating-Mulch |
| Deck Gauge | 7 | 7 |
| Min Cut Height | 1.5 in (38 mm) | 1.5 in (38 mm) |
| Max Cut Height | 5.5 in (140 mm) | 5.5 in (140 mm) |
| Drive | ||
| Transmission | Hydro | Hydro |
| Ground Speed | 12.5 mph | 12.5 mph |
| Reverse Speed | 7 mph | 7 mph |
| Dimensions | ||
| Weight | 1160 lbs (526.2 kg) | 1310 lbs (594.2 kg) |
| Fuel Capacity | 15.5 gal (58.7 L) | 15.5 gal (58.7 L) |
| Length | 70 in (1778 mm) | 70 in (1778 mm) |
Where these models differ, explained
Stander ZK 61 FX820: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kawasakienginesusa.com.
Autonomous ZK 61 61G8: Specs verified against the retailer listing on Jun 6, 2026 — barryspowerequipment.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.