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Scag SLS

Zero-Turn mower · Commercial-duty · Gas

Scag doesn’t publish a list price for this model — it’s dealer quote only. The Scag product page is the place to start.

The Scag SLS is a commercial-grade gas zero-turn mower, built for daily commercial mowing, with a 42-inch deck.

At a glance

Power Source
gas
Cutting Width
42 in (1067 mm)
Engine Power
20 hp
Ground Speed
7 mph
Fuel Capacity
3.5 gal (13.2 L)
Compare this mower: Pick another Scag zero-turn or pick from every zero-turn mower   or quick compare: vs Cheetah II · vs EVZ · vs Freedom Z
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
  • Bad Boy Mowers MZ Rambler
    Deck 42 in (1067 mm) · Briggs, 19 hp, 540 cc
    Fuel capacity 5 gal (18.9 L) (this model: 3.5 gal (13.2 L))Ground speed 6 mph (this model: 7 mph)
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Commercial-duty, like this model · 19 hp (this model: 20 hp) · By Bad Boy Mowers, a different maker
    Compare with the SLS ›
  • Ferris 300R Zero Turn Mower (42 in / 5902205)
    Deck 42 in (1067 mm) · Kawasaki®, 21.5 hp, 726 cc
    Ground speed 8 mph (this model: 7 mph)Fuel capacity 3 gal (11.4 L) (this model: 3.5 gal (13.2 L))
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Commercial-duty, like this model · 21.5 hp (this model: 20 hp) · By Ferris, a different maker
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  • Gravely ZT X 42 KAWASAKI
    Deck 42 in (1067 mm) · Kawasaki® FR651V, 21.5 hp, 726 cc
    Engine power 21.5 hp (this model: 20 hp)
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Commercial-duty, like this model · 21.5 hp (this model: 20 hp) · By Gravely, a different maker
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  • Gravely ZT XL 42 KAWASAKI
    Deck 42 in (1067 mm) · Kawasaki® FR651V, 21.5 hp, 726 cc
    Engine power 21.5 hp (this model: 20 hp)
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Commercial-duty, like this model · 21.5 hp (this model: 20 hp) · By Gravely, a different maker
    Compare with the SLS ›
  • Kubota Z232KW-42
    Deck 42 in (1067 mm) · Kawasaki FR651V, 21.5 hp, 726 cc
    Engine power 21.5 hp (this model: 20 hp)Ground speed 6.5 mph (this model: 7 mph)
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Commercial-duty, like this model · 21.5 hp (this model: 20 hp) · By Kubota, a different maker
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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

Scag SLS engine specifications
Power Sourcegas
Engine Power20 hp
Engine MakeBriggs & Stratton® PXi Series™

Deck

Scag SLS deck specifications
Cutting Width42 in (1067 mm)
Min Cut Height1.5 in (38 mm)
Max Cut Height4.5 in (114 mm)
Deck ConstructionDual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles.

Drive

Scag SLS drive specifications
Ground Speed7 mph
Drive Tire Size20″ x 8″-8″ (42”)20″ x 10″-8″ (52”)20″ x 10″-8″ (61”)
Drive SystemHydro-Gear ZT2200 (EZT)
Reverse Speed5 mph

Dimensions

Scag SLS dimensions specifications
Fuel Capacity3.5 gal (13.2 L)

Professional use

How the SLS fits commercial and high-acreage work, from the specs we have. Duty class: Commercial.

Acres/hr (80%)
1.66
Acres/hr (100%)
2.97
Deck width
42 in
Ground speed
7 mph

Productivity computed from deck width and ground speed. Compare on the calculator ›

Scag SLS professional and productivity specifications
Deck width42 in
Engine makeBriggs & Stratton® PXi Series™
Engine power20 hp
Ground speed7 mph
Cut-height range38 mm – 114 mm
Fuel capacity13.2 L
Deck constructionDual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles.
Drive tire size20″ x 8″-8″ (42”)20″ x 10″-8″ (52”)20″ x 10″-8″ (61”)

Scag doesn’t publish 11 of these for the SLS: engine displacement, transmission, drive type, weight, warranty, commercial warranty, deck gauge, spindle type, frame construction, anti-scalp rollers, seat type.

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 SLS.

42-in Gas Zero Turn Riding Lawn Mower Craftsman · 42 in (1067 mm)
60V 42 in Electric CrossoverZ Zero Turn Mower Greenworks · 42 in (1067 mm)
POWER+ 42 in Z6 Zero Turn Mower with e-STEER Technology… EGO · 42 in (1067 mm)
POWER+ 42 in Z6 Zero Turn Mower with e-STEER Technology EGO · 42 in (1067 mm)
POWER+ 42 in Z6 Zero Turn Riding Mower with Six 6.0 Ah… EGO · 42 in (1067 mm)
POWER+ 42 in Z6 Zero Turn Riding Mower (ZT4204L) EGO · 42 in (1067 mm)

Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.

See every mower with a Briggs & Stratton 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 acre9 min 6 min
  • ½ acre18 min 13 min
  • 1 acre36 min 25 min
  • 2 acres1 h 12 min 51 min
  • 5 acres3 h 2 h 6 min

About 36 min per acre at 1.66 acres/hour, mowing at 4.9 mph. The second figure is at the published 7.0 mph top speed (2.38 acres/hour) — faster than anyone really mows. About 5.8 acres per tank.

Gate & trailer fit

  • 32 in gateToo wide
  • 36 in gateToo wide
  • 48 in gateToo wide

Needs at least 49 in of clearance (estimated).

Power & run time

  • Power per deck inch0.476 hp/in
  • Run time per tank~3.5 h

Mowing times assume 1.66 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.

Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.

Scag SLS questions

What size deck is on the Scag SLS?

The Scag SLS has a 42-inch (1067 mm) cutting deck.

What engine is in the Scag SLS?

The Scag SLS is powered by a Briggs & Stratton® PXi Series™, 20 hp. Horsepower is the manufacturer's own rating.

How fast is the Scag SLS?

Top ground speed is 7 mph. With its 42-inch deck that works out to about 2.38 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.

How long does the Scag SLS take to mow an acre?

About 25 min per acre, from its 42-inch deck at 7 mph and 80% efficiency — roughly 2.38 acres an hour, so five acres is about 2 h 6 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 SLS?

The Scag SLS holds 3.5 gal (13.2 L) of fuel.

How much does the Scag SLS cost?

Scag doesn't publish a list price for the Scag SLS — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.

What is the Scag SLS built for?

Commercial-duty zero-turn mower. Built for daily, paid commercial use.

Source: Scag (manufacturer) · archived copy

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