Wright Autonomous ZK 72 61G8
Commercial mower · Model WSZK72M61G83BR · Commercial-duty · Gas
Wright doesn’t publish a list price for this model — it’s dealer quote only. The Wright product page is the place to start.
- Weighs 1,201 lb
- On a 6×12 trailer 2,101 lb towed, single-axle 3,500 lb
- Mows an acre in 12 min (8 at top speed) How long for your yard? ›
- How these are worked out ›
The Wright Autonomous ZK 72 61G8 is a commercial-grade gas commercial mower, built for daily commercial mowing, with a 72-inch deck and a 993cc engine making 40 hp. It weighs 1201 lb (544.8 kg).
At a glance
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
Chosen by stated rules, not opinion: same class, a deck within 8 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.
Engine
| Power Source | gas |
|---|---|
| Engine Make | Briggs & Stratton |
| Displacement | 60.6 ci (993 cc) |
| Engine Power | 40 hp |
| Engine Model | 61G8 |
| Fuel Type | Gasoline |
| Start Type | Electric |
Deck
| Cutting Width | 72 in (1829 mm) |
|---|---|
| Blades | 3 |
| Deck Material | 7 Gauge |
| Deck Construction | Floating-Mulch |
| Deck Gauge | 7 |
| Max Cut Height | 5.5 in (140 mm) |
| Min Cut Height | 1.5 in (38 mm) |
Drive
| Transmission | Hydro |
|---|---|
| Ground Speed | 12.5 mph |
| Reverse Speed | 7 mph |
Dimensions
| Weight | 1201 lbs (544.8 kg) |
|---|---|
| Fuel Capacity | 15.5 gal (58.7 L) |
| Length | 72 in (1829 mm) |
Professional use
How the Autonomous ZK 72 61G8 fits commercial and high-acreage work, from the specs we have. Duty class: Commercial.
Productivity computed from deck width and ground speed. Compare on the calculator ›
| Deck width | 72 in |
|---|---|
| Engine make | Briggs & Stratton |
| Engine displacement | 993 cc |
| Engine power | 40 hp |
| Transmission | Hydro |
| Ground speed | 12.5 mph |
| Cut-height range | 38 mm – 140 mm |
| Fuel capacity | 58.7 L |
| Weight | 544.8 kg |
| Deck construction | Floating-Mulch |
| Deck gauge | 7 ga |
Wright doesn’t publish 8 of these for the Autonomous ZK 72 61G8: drive type, warranty, commercial warranty, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
See the Wright commercial pro hub › · Professional buying hub ›
Similar models
Other commercial mowers with comparable specs — including other brands — that buyers cross-shop with the Autonomous ZK 72 61G8.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — wrightmfg.com.
See every mower with a Briggs & Stratton engine ›
What the parts on this spec sheet mean
Other Wright Autonomous ZK models › 1 more in this range: Autonomous ZK 61 61G8
See all Wright mowers and specs ›
Spot a wrong spec? Suggest a correction.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
What the specs work out to
Figures MowerFacts computes from Wright’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre3 min 2 min
- ½ acre6 min 4 min
- 1 acre12 min 8 min
- 2 acres24 min 16 min
- 5 acres59 min 41 min
- 10 acres1 h 58 min 1 h 22 min
About 12 min per acre at 5.09 acres/hour, mowing at 8.8 mph. The second figure is at the published 12.5 mph top speed (7.27 acres/hour) — faster than anyone really mows. About 78.9 acres per tank.
Weight & hauling
- Machine weight1,201 lb
- + 6×12 trailer900 lb
- Towed weight2,101 lb
- single-axle 3,500 lbCarries it, 1,399 lb spare
- tandem-axle 7,000 lbCarries it, 4,899 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 2,101 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateToo wide
Needs at least 79 in of clearance (estimated).
Power & run time
- Power per deck inch0.555 hp/in
- Run time per tank~15.5 h
Mowing times assume 5.09 acres/hour: deck width x 8.8 mph at 80% efficiency, which allows for overlap, turns and trimming. 8.8 mph is 70% of the 12.5 mph top speed Wright publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 12.5 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because Wright doesn't publish an overall width — measure before buying if a gate is tight.
Towed weight adds a 900 lb allowance for a 6x12 open utility trailer to Wright's published machine weight. Your trailer's own weight is on its VIN plate. Tongue weight, axle placement and your vehicle's tow rating are still yours to check — this is the load, not a loading plan.
Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.
Wright Autonomous ZK 72 61G8 questions
What size deck is on the Wright Autonomous ZK 72 61G8?
The Wright Autonomous ZK 72 61G8 has a 72-inch (1829 mm) cutting deck with 3 blades and 7 gauge construction.
What engine is in the Wright Autonomous ZK 72 61G8?
The Wright Autonomous ZK 72 61G8 is powered by a Briggs & Stratton 61G8, 993 cc, 40 hp. Horsepower is the manufacturer's own rating.
How much does the Wright Autonomous ZK 72 61G8 weigh?
The Wright Autonomous ZK 72 61G8 weighs 1,201 lb (544.8 kg) as specified by Wright.
What size trailer do I need for the Wright Autonomous ZK 72 61G8?
At 1,201 lb, the Wright Autonomous ZK 72 61G8 on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 2,101 lb of towed weight. That is within a single-axle 3,500 lb trailer, and your tow vehicle needs to be rated for at least 2,101 lb. Tongue weight, axle placement and your own trailer's empty weight still have to be checked — this is the arithmetic, not a loading plan.
How fast is the Wright Autonomous ZK 72 61G8?
Top ground speed is 12.5 mph. With its 72-inch deck that works out to about 7.27 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Wright Autonomous ZK 72 61G8 take to mow an acre?
About 8 min per acre, from its 72-inch deck at 12.5 mph and 80% efficiency — roughly 7.27 acres an hour, so five acres is about 41 min. Rough or obstacle-heavy ground takes longer; this is deck width times ground speed, not a timed test.
How big is the fuel tank on the Wright Autonomous ZK 72 61G8?
The Wright Autonomous ZK 72 61G8 holds 15.5 gal (58.7 L) of fuel.
How much does the Wright Autonomous ZK 72 61G8 cost?
Wright doesn't publish a list price for the Wright Autonomous ZK 72 61G8 — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.
What is the Wright Autonomous ZK 72 61G8 built for?
Commercial-duty commercial mower. Built for daily, paid commercial use.
Source: Wright (manufacturer) · archived copy