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Gravely PRO-TURN 660 KAWASAKI EFI

Zero-Turn mower · Model 992503 · Commercial-duty · Gas

A$29,999 Gravely Australia RRP (inc. GST)

Recommended retail price in Australian dollars, read 20 Oct 2026 from the Gravely Australia product page.

Sold in Australia — listed on gravely.com.au, checked 20 Oct 2026. Listed there as Pro-Turn 660 EFI Zero-Turn Mower (AGU992503). Also sold in the United States: US specs and list price.

Dealers set the final price; delivery, assembly and any local offer are extra and are not tracked here.

The Gravely PRO-TURN 660 KAWASAKI EFI is a commercial-grade gas zero-turn mower, built for daily commercial mowing, with a 60-inch deck and a 999cc engine making 38.5 hp. It weighs 1601 lb (726.2 kg).

At a glance

Power Source
gas
Cutting Width
60 in (1524 mm)
Displacement
61 ci (999 cc)
Engine Power
38.5 hp
Ground Speed
15 mph
Weight
1601 lbs (726.2 kg)
Compare this mower: Pick another Gravely zero-turn or pick from every zero-turn mower sold in Australia   or quick compare: vs COMPACT-PRO 34 KAWASAKI · vs PRO-TURN 148 KAWASAKI · vs PRO-TURN 152 KAWASAKI
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
  • Gravely PRO-TURN 560 KAWASAKI FX1000 EFI
    Deck 1,524 mm (60 in) · Kawasaki® FX1000 EFI, 38.5 hp, 999 cc · RRP A$27,999
    Fuel capacity 50.7 L (13.4 gal) (this model: 47.3 L (12.5 gal))
    Why: Same class: zero-turn · Same 60 in deck · Gas engine, like this model · Commercial-duty, like this model · 38.5 hp (this model: 38.5 hp) · Also by Gravely
    Compare with the PRO-TURN 660 KAWASAKI EFI ›
  • Gravely PRO-TURN MACH ONE KAWASAKI FX1000 EFI
    Deck 1,524 mm (60 in) · Kawasaki® FX1000 EFI, 38.5 hp, 999 cc · RRP A$28,499
    Ground speed 13 mph (this model: 15 mph)Fuel capacity 50.7 L (13.4 gal) (this model: 47.3 L (12.5 gal))
    Why: Same class: zero-turn · Same 60 in deck · Gas engine, like this model · Commercial-duty, like this model · 38.5 hp (this model: 38.5 hp) · Also by Gravely
    Compare with the PRO-TURN 660 KAWASAKI EFI ›
  • Bad Boy Mowers Rebel
    Deck 1,549 mm (61 in) · Kawasaki, 31 hp, 822 cc
    Ground speed 12 mph (this model: 15 mph)Engine power 31 hp (this model: 38.5 hp)
    Why: Same class: zero-turn · 61 in deck, within 6 in of this model's 60 in · Gas engine, like this model · Commercial-duty, like this model · 31 hp (this model: 38.5 hp) · By Bad Boy Mowers, a different maker
    Compare with the PRO-TURN 660 KAWASAKI EFI ›
  • John Deere Z735EZTrak Zero Turn Mower
    Deck 1,524 mm (60 in) · 25 hp, 810 cc
    Ground speed 8 mph (this model: 15 mph)Weight 449.1 kg (990 lbs) (this model: 726.2 kg (1,601 lbs))
    Why: Same class: zero-turn · Same 60 in deck · Gas engine, like this model · Commercial-duty, like this model · 25 hp (this model: 38.5 hp) · By John Deere, a different maker
    Compare with the PRO-TURN 660 KAWASAKI EFI ›
  • Kubota Z452KWTi-60
    Deck 1,524 mm (60 in) · Kawasaki (FT Series), 26 hp, 726 cc
    Fuel capacity 25.7 L (6.8 gal) (this model: 47.3 L (12.5 gal))Weight 448.2 kg (988 lbs) (this model: 726.2 kg (1,601 lbs))
    Why: Same class: zero-turn · Same 60 in deck · Gas engine, like this model · Commercial-duty, like this model · 26 hp (this model: 38.5 hp) · By Kubota, a different maker
    Compare with the PRO-TURN 660 KAWASAKI EFI ›

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

Gravely PRO-TURN 660 KAWASAKI EFI engine specifications
Power Sourcegas
Displacement61 ci (999 cc)
Engine Power38.5 hp
Engine MakeKawasaki®
Engine ModelFX1000 EFI
Fuel TypeGas

Deck

Gravely PRO-TURN 660 KAWASAKI EFI deck specifications
Cutting Width60 in (1524 mm)
Deck Material7 ga
Deck ConstructionFabricated X-Factor® 3
Deck Gauge7
DischargeSide

Drive

Gravely PRO-TURN 660 KAWASAKI EFI drive specifications
Ground Speed15 mph
Drive SystemHydrostatic
Reverse Speed6 mph

Dimensions

Gravely PRO-TURN 660 KAWASAKI EFI dimensions specifications
Weight1601 lbs (726.2 kg)
Fuel Capacity12.5 gal (47.3 L)

Similar models

Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the PRO-TURN 660 KAWASAKI EFI.

Rebel Bad Boy Mowers · 61 in (1549 mm)
Pro-Turn 652 Zero-Turn Mower Gravely · 52 in (1321 mm)
Pro-Turn 348 Zero-Turn Mower Gravely · 48 in (1219 mm)
Z760RZTrak Zero Turn Mower John Deere · 54 in (1372 mm)
Z735EZTrak Zero Turn Mower John Deere · 60 in (1524 mm)
Maverick HD Bad Boy Mowers · 48 in (1219 mm)

Specs verified against the retailer listing on Jun 6, 2026 — haightsmobile.com.

What the parts on this spec sheet mean

See all Gravely 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 Gravely’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 10.5 mph. The second figure is at the published 15.0 mph top speed (7.27 acres/hour) — faster than anyone really mows. About 63.6 acres per tank.

Weight & hauling

  • Machine weight1,601 lb
  • + 6×12 trailer900 lb
  • Towed weight2,501 lb
  • single-axle 3,500 lbCarries it, 999 lb spare
  • tandem-axle 7,000 lbCarries it, 4,499 lb spare

Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 2,501 lb.

Gate & trailer fit

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

Needs at least 66 in of clearance (estimated).

Power & run time

  • Power per deck inch0.642 hp/in
  • Run time per tank~12.5 h

Mowing times assume 5.09 acres/hour: deck width x 10.5 mph at 80% efficiency, which allows for overlap, turns and trimming. 10.5 mph is 70% of the 15.0 mph top speed Gravely publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 15.0 mph, shown so you can see it.

Fit uses the deck width plus 6 in for the discharge chute, because Gravely 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 Gravely'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.

Source: Gravely (manufacturer) · archived copy

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