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John Deere Z320MZTrak™ Mower with 42-in. Deck

Zero-Turn mower · Model Z320M · Prosumer-duty · Gas

John Deere Australia doesn’t publish a recommended retail price for this model online — it’s dealer quote only. The John Deere Australia product page is the place to start.

Sold in Australia — listed on deere.com.au, checked 20 Oct 2026. Listed there as Z320M (Z320M). Also sold in the United States: US specs and list price.

The John Deere Z320MZTrak Mower with 42-in. Deck is a prosumer-grade gas zero-turn mower, built for large residential properties and acreage, with a 42-inch deck and a 726cc engine making 21.5 hp. It weighs 561 lb (254.5 kg).

At a glance

Power Source
gas
Cutting Width
42 in (1067 mm)
Displacement
44.3 ci (726 cc)
Engine Power
21.5 hp
Ground Speed
7 mph
Weight
561 lbs (254.5 kg)
Compare this mower: Pick another John Deere zero-turn or pick from every zero-turn mower sold in Australia   or quick compare: vs Z315EZTrak Mower with 42-in. Deck · vs Z325EZTrak Mower with 48-in. Deck · vs Z370R ElectricZTrak Mower
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
  • Husqvarna Z242F
    Deck 1,067 mm (42 in) · Kawasaki FR Series, 21.5 hp, 725.9 cc · RRP A$9,499
    Fuel capacity 13.2 L (3.5 gal) (this model: 11.4 L (3 gal))Max cut height 102 mm (4 in) (this model: 114 mm (4.5 in))
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Prosumer-duty, like this model · 21.5 hp (this model: 21.5 hp) · By Husqvarna, a different maker
    Compare with the Z320MZTrak Mower with 42-in. Deck ›
  • Toro 42 in TimeCutter SS 4225
    Deck 1,067 mm (42 in) · 22 hp, 725 cc
    Weight 240.4 kg (530 lbs) (this model: 254.5 kg (561 lbs))
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Prosumer-duty, like this model · 22 hp (this model: 21.5 hp) · By Toro, a different maker
    Compare with the Z320MZTrak Mower with 42-in. Deck ›
  • Cox 400 Series 442 42 in
    Deck 1,067 mm (42 in) · Kawasaki Kawasaki FR651V, 21.5 hp, 726 cc · RRP A$9,999
    Fuel capacity 32 L (8.5 gal) (this model: 11.4 L (3 gal))Max cut height 102 mm (4 in) (this model: 114 mm (4.5 in))
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Prosumer-duty, like this model · 21.5 hp (this model: 21.5 hp) · By Cox, a different maker
    Compare with the Z320MZTrak Mower with 42-in. Deck ›
  • Bad Boy Mowers 2026 Rambler
    Deck 1,067 mm (42 in) · 21.5 hp, 726 cc · RRP A$9,240
    Fuel capacity 22.7 L (6 gal) (this model: 11.4 L (3 gal))Warranty 2 yr (this model: 3 yr)
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Prosumer-duty, like this model · 21.5 hp (this model: 21.5 hp) · By Bad Boy Mowers, a different maker
    Compare with the Z320MZTrak Mower with 42-in. Deck ›
  • Ariens IKON 42 KAWASAKI
    Deck 1,067 mm (42 in) · Kawasaki® FR651V, 21.5 hp, 726 cc · RRP A$8,999
    Weight 296.6 kg (654 lbs) (this model: 254.5 kg (561 lbs))Fuel capacity 13.2 L (3.5 gal) (this model: 11.4 L (3 gal))
    Why: Same class: zero-turn · Same 42 in deck · Gas engine, like this model · Prosumer-duty, like this model · 21.5 hp (this model: 21.5 hp) · By Ariens, a different maker
    Compare with the Z320MZTrak Mower with 42-in. Deck ›

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

John Deere Z320MZTrak Mower with 42-in. Deck engine specifications
Power Sourcegas
Displacement44.3 ci (726 cc)
Engine Power21.5 hp
Cylinders2

Deck

John Deere Z320MZTrak Mower with 42-in. Deck deck specifications
Cutting Width42 in (1067 mm)
Min Cut Height1.3 in (32 mm)
Max Cut Height4.5 in (114 mm)
Deck Material12 gauge 0.105 in. 2.7 mm
Deck Gauge12

Drive

John Deere Z320MZTrak Mower with 42-in. Deck drive specifications
Ground Speed7 mph
Drive SystemV-belt
Reverse Speed3.5 mph

Dimensions

John Deere Z320MZTrak Mower with 42-in. Deck dimensions specifications
Weight561 lbs (254.5 kg)
Fuel Capacity3 gal (11.4 L)

General

John Deere Z320MZTrak Mower with 42-in. Deck general specifications
Warranty3 yr

Similar models

Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the Z320MZTrak Mower with 42-in. Deck.

42 in Deck Victa · 42 in (1067 mm)
42 in eTimeCutter eMR4275 60V Battery Powered Ride-On Mower Toro · 42 in (1067 mm)
80V HP 42 in ZT Ride-On Mower Bonus Battery & Cover Kit Ryobi · 41.7 in (1060 mm)
42 in TimeCutter SS 4225 Toro · 42 in (1067 mm)
Z 245i Husqvarna · 42.1 in (1070 mm)
Z242E Husqvarna · 42 in (1067 mm)

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

What the parts on this spec sheet mean

See all John Deere 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 John Deere’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 5.0 acres per tank.

Weight & hauling

  • Machine weight561 lb
  • + 6×12 trailer900 lb
  • Towed weight1,461 lb
  • single-axle 3,500 lbCarries it, 2,039 lb spare
  • tandem-axle 7,000 lbCarries it, 5,539 lb spare

Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 1,461 lb.

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 inch0.512 hp/in
  • Run time per tank~3.0 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 John Deere 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 John Deere 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 John Deere'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: John Deere (manufacturer) · archived copy

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