Kubota Z781KWi-54
Zero-Turn mower · Model Z781KWi-54 · Commercial-duty · Gas
Kubota doesn’t publish a list price for this model — it’s dealer quote only. The Kubota product page is the place to start.
- Weighs 1,254 lb
- On a 6×12 trailer 2,154 lb towed, single-axle 3,500 lb
- Mows an acre in 18 min (12 at top speed) How long for your yard? ›
- How these are worked out ›
The Kubota Z781KWi-54 is a commercial-grade gas zero-turn mower, built for daily commercial mowing, with a 54-inch deck and a 852cc engine making 29.5 hp. It weighs 1254 lb (568.8 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 6 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 |
|---|---|
| Displacement | 52 ci (852 cc) |
| Engine Power | 29.5 hp |
| Engine Make | Kawasaki FX850-EFI |
| Fuel Type | Gasoline |
Deck
| Cutting Width | 54 in (1372 mm) |
|---|---|
| Min Cut Height | 1 in (25 mm) |
| Max Cut Height | 5 in (127 mm) |
Drive
| Transmission | Parker HTG14 |
|---|---|
| Ground Speed | 11.2 mph |
| Drive System | Belt |
Dimensions
| Weight | 1254 lbs (568.8 kg) |
|---|---|
| Fuel Capacity | 11.6 gal (43.9 L) |
Professional use
How the Z781KWi-54 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 | 54 in |
|---|---|
| Engine make | Kawasaki FX850-EFI |
| Engine displacement | 852 cc |
| Engine power | 29.5 hp |
| Transmission | Parker HTG14 |
| Ground speed | 11.2 mph |
| Cut-height range | 25 mm – 127 mm |
| Fuel capacity | 43.9 L |
| Weight | 568.8 kg |
Kubota doesn’t publish 10 of these for the Z781KWi-54: drive type, warranty, commercial warranty, deck construction, deck gauge, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
See the Kubota commercial pro hub › · Professional buying hub ›
Similar models
Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the Z781KWi-54.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — kubotausa.com.
See every mower with a Kawasaki FX850 engine ›
What the parts on this spec sheet mean
Other Kubota Z700 Series models › 10 more in this range: Z723KH-3-48, Z724KHNC-54, Z724XKWNC-48, Z724XKWNC-54 and more
See all Kubota 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 Kubota’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre4 min 3 min
- ½ acre9 min 6 min
- 1 acre18 min 12 min
- 2 acres35 min 25 min
- 5 acres1 h 28 min 1 h 1 min
- 10 acres2 h 55 min 2 h 3 min
About 18 min per acre at 3.42 acres/hour, mowing at 7.8 mph. The second figure is at the published 11.2 mph top speed (4.89 acres/hour) — faster than anyone really mows. About 39.7 acres per tank.
Weight & hauling
- Machine weight1,254 lb
- + 6×12 trailer900 lb
- Towed weight2,154 lb
- single-axle 3,500 lbCarries it, 1,346 lb spare
- tandem-axle 7,000 lbCarries it, 4,846 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 2,154 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateToo wide
Needs at least 61 in of clearance (estimated).
Power & run time
- Power per deck inch0.546 hp/in
- Run time per tank~11.6 h
Mowing times assume 3.42 acres/hour: deck width x 7.8 mph at 80% efficiency, which allows for overlap, turns and trimming. 7.8 mph is 70% of the 11.2 mph top speed Kubota publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 11.2 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because Kubota 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 Kubota'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.
Kubota Z781KWi-54 questions
What size deck is on the Kubota Z781KWi-54?
The Kubota Z781KWi-54 has a 54-inch (1372 mm) cutting deck.
What engine is in the Kubota Z781KWi-54?
The Kubota Z781KWi-54 is powered by a Kawasaki FX850-EFI, 852 cc, 29.5 hp. Horsepower is the manufacturer's own rating.
How much does the Kubota Z781KWi-54 weigh?
The Kubota Z781KWi-54 weighs 1,254 lb (568.8 kg) as specified by Kubota.
What size trailer do I need for the Kubota Z781KWi-54?
At 1,254 lb, the Kubota Z781KWi-54 on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 2,154 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 2,154 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 Kubota Z781KWi-54?
Top ground speed is 11.2 mph. With its 54-inch deck that works out to about 4.89 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Kubota Z781KWi-54 take to mow an acre?
About 12 min per acre, from its 54-inch deck at 11.2 mph and 80% efficiency — roughly 4.89 acres an hour, so five acres is about 1 h 1 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 Kubota Z781KWi-54?
The Kubota Z781KWi-54 holds 11.6 gal (43.9 L) of fuel.
How much does the Kubota Z781KWi-54 cost?
Kubota doesn't publish a list price for the Kubota Z781KWi-54 — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.
What is the Kubota Z781KWi-54 built for?
Commercial-duty zero-turn mower. Built for daily, paid commercial use.
Source: Kubota (manufacturer) · archived copy