Scag Liberty Z
Zero-Turn mower · Commercial-duty · Gas
$5,599–$7,399 Scag list price (configurations)
Manufacturer list price only — it excludes tax, freight, dealer setup and any local discount, and dealers set the final price.
- Weighs 555 lb
- On a 6×12 trailer 1,455 lb towed, single-axle 3,500 lb
- Mows an acre in 42 min (29 at top speed) How long for your yard? ›
- How these are worked out ›
The Scag Liberty Z is a commercial-grade gas zero-turn mower, built for daily commercial mowing, with a 36-inch deck. It weighs 555 lb (251.7 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 |
|---|---|
| Engine Power | 18 hp |
| Engine Make | Kawasaki® FR Series |
Deck
| Cutting Width | 36 in (914 mm) |
|---|---|
| Min Cut Height | 1.5 in (38 mm) |
| Max Cut Height | 4.5 in (114 mm) |
| Deck Construction | Dual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles. |
Drive
| Ground Speed | 7 mph |
|---|---|
| Drive Tire Size | 20″ x 8″-10″ (36″)20″ x 10″-8″ (42″, 48″ and 52″)20″ x 10″-10″ (61″) |
| Drive System | 36″ and 42″ models: Hydro-Gear ZT-2800 Transaxle48″, 52″ and 61″ models: Tuff Torq TZ450 Transaxle |
| Reverse Speed | 5 mph |
Dimensions
| Weight | 555 lbs (251.7 kg) |
|---|---|
| Fuel Capacity | 3.5 gal (13.2 L) |
Commercial / Pro
| Seat Type | Padded with arm rests, adjustment forward and back (tools required)(no armrests on 36″ and 42″ models) |
|---|
Professional use
How the Liberty Z 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 | 36 in |
|---|---|
| Engine make | Kawasaki® FR Series |
| Engine power | 18 hp |
| Ground speed | 7 mph |
| Cut-height range | 38 mm – 114 mm |
| Fuel capacity | 13.2 L |
| Weight | 251.7 kg |
| Deck construction | Dual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles. |
| Drive tire size | 20″ x 8″-10″ (36″)20″ x 10″-8″ (42″, 48″ and 52″)20″ x 10″-10″ (61″) |
| Seat type | Padded with arm rests, adjustment forward and back (tools required)(no armrests on 36″ and 42″ models) |
Scag doesn’t publish 9 of these for the Liberty Z: engine displacement, transmission, drive type, warranty, commercial warranty, deck gauge, spindle type, frame construction, anti-scalp rollers.
See the Scag commercial pro hub › · Professional buying hub ›
Similar models
Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the Liberty Z.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.
See every mower with a Kawasaki FR Series engine ›
What the parts on this spec sheet mean
See all Scag 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 Scag’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre11 min 7 min
- ½ acre21 min 15 min
- 1 acre42 min 29 min
- 2 acres1 h 24 min 59 min
- 5 acres3 h 30 min 2 h 27 min
About 42 min per acre at 1.43 acres/hour, mowing at 4.9 mph. The second figure is at the published 7.0 mph top speed (2.04 acres/hour) — faster than anyone really mows. About 5.0 acres per tank.
Weight & hauling
- Machine weight555 lb
- + 6×12 trailer900 lb
- Towed weight1,455 lb
- single-axle 3,500 lbCarries it, 2,045 lb spare
- tandem-axle 7,000 lbCarries it, 5,545 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 1,455 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateFits
Needs at least 42 in of clearance (estimated).
Power & run time
- Power per deck inch0.5 hp/in
- Run time per tank~3.5 h
Mowing times assume 1.43 acres/hour: deck width x 4.9 mph at 80% efficiency, which allows for overlap, turns and trimming. 4.9 mph is 70% of the 7.0 mph top speed Scag publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 7.0 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because Scag 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 Scag'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.
Scag Liberty Z questions
What size deck is on the Scag Liberty Z?
The Scag Liberty Z has a 36-inch (914 mm) cutting deck.
What engine is in the Scag Liberty Z?
The Scag Liberty Z is powered by a Kawasaki® FR Series, 18 hp. Horsepower is the manufacturer's own rating.
How much does the Scag Liberty Z weigh?
The Scag Liberty Z weighs 555 lb (251.7 kg) as specified by Scag.
What size trailer do I need for the Scag Liberty Z?
At 555 lb, the Scag Liberty Z on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 1,455 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 1,455 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 Scag Liberty Z?
Top ground speed is 7 mph. With its 36-inch deck that works out to about 2.04 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Scag Liberty Z take to mow an acre?
About 29 min per acre, from its 36-inch deck at 7 mph and 80% efficiency — roughly 2.04 acres an hour, so five acres is about 2 h 27 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 Scag Liberty Z?
The Scag Liberty Z holds 3.5 gal (13.2 L) of fuel.
How much does the Scag Liberty Z cost?
Scag's published list price is $5,599 to $7,399 depending on configuration, checked 23 October 2026. That excludes tax, freight, dealer setup and any local discount — dealers set the final price.
What is the Scag Liberty Z built for?
Commercial-duty zero-turn mower. Built for daily, paid commercial use.
Source: Scag (manufacturer) · archived copy