John Deere Z320MZTrak™ Mower with 42-in. Deck
Zero-Turn mower · Model Z320M · Prosumer-duty · Gas
John Deere doesn’t publish a list price for this model — it’s dealer quote only. The John Deere product page is the place to start.
- Weighs 561 lb
- On a 6×12 trailer 1,461 lb towed, single-axle 3,500 lb
- Mows an acre in 36 min (25 at top speed) How long for your yard? ›
- How these are worked out ›
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
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 | 44.3 ci (726 cc) |
| Engine Power | 21.5 hp |
| Cylinders | 2 |
Deck
| Cutting Width | 42 in (1067 mm) |
|---|---|
| Min Cut Height | 1.3 in (32 mm) |
| Max Cut Height | 4.5 in (114 mm) |
| Deck Material | 12 gauge 0.105 in. 2.7 mm |
| Deck Gauge | 12 |
Drive
| Ground Speed | 7 mph |
|---|---|
| Drive System | V-belt |
| Reverse Speed | 3.5 mph |
Dimensions
| Weight | 561 lbs (254.5 kg) |
|---|---|
| Fuel Capacity | 3 gal (11.4 L) |
General
| Warranty | 3 yr |
|---|
Productivity & acreage
Z320MZTrak Mower with 42-in. Deck deck width, ground speed and computed acres-per-hour, from the specs we have. Duty class: Prosumer — A higher-capacity homeowner machine for larger properties and acreage.
Productivity computed from deck width and ground speed. Compare on the calculator ›
| Deck width | 42 in |
|---|---|
| Engine displacement | 726 cc |
| Engine power | 21.5 hp |
| Ground speed | 7 mph |
| Cut-height range | 32 mm – 114 mm |
| Fuel capacity | 11.4 L |
| Weight | 254.5 kg |
| Warranty | 3 |
| Deck construction | 12 gauge 0.105 in. 2.7 mm |
| Deck gauge | 12 ga |
John Deere doesn’t publish 9 of these for the Z320MZTrak Mower with 42-in. Deck: engine make, transmission, drive type, commercial warranty, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
See the John Deere commercial pro hub › · Professional buying hub ›
Similar models
Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the Z320MZTrak Mower with 42-in. Deck.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — deere.com.
What the parts on this spec sheet mean
Other John Deere Z300 Series models › 8 more in this range: Z315EZTrak Mower with 42-in. Deck, Z320RZTrak Mower with 42-in. Deck, Z325EZTrak Mower with 48-in. Deck, Z330MZTrak Mower with 48-in. Deck and more
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.
John Deere Z320MZTrak Mower with 42-in. Deck questions
What size deck is on the John Deere Z320MZTrak Mower with 42-in. Deck?
The John Deere Z320MZTrak Mower with 42-in. Deck has a 42-inch (1067 mm) cutting deck with 12 gauge 0.105 in. 2.7 mm construction.
What engine is in the John Deere Z320MZTrak Mower with 42-in. Deck?
The John Deere Z320MZTrak Mower with 42-in. Deck is powered by 726 cc, 21.5 hp. Horsepower is the manufacturer's own rating.
How much does the John Deere Z320MZTrak Mower with 42-in. Deck weigh?
The John Deere Z320MZTrak Mower with 42-in. Deck weighs 561 lb (254.5 kg) as specified by John Deere.
What size trailer do I need for the John Deere Z320MZTrak Mower with 42-in. Deck?
At 561 lb, the John Deere Z320MZTrak Mower with 42-in. Deck on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 1,461 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 1,461 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 John Deere Z320MZTrak Mower with 42-in. Deck?
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 John Deere Z320MZTrak Mower with 42-in. Deck 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 John Deere Z320MZTrak Mower with 42-in. Deck?
The John Deere Z320MZTrak Mower with 42-in. Deck holds 3 gal (11.4 L) of fuel.
How much does the John Deere Z320MZTrak Mower with 42-in. Deck cost?
John Deere doesn't publish a list price for the John Deere Z320MZTrak Mower with 42-in. Deck — it's sold on a dealer quote. MowerFacts records prices only where the manufacturer publishes them.
What is the John Deere Z320MZTrak Mower with 42-in. Deck built for?
Prosumer-duty zero-turn mower. A higher-capacity homeowner machine for larger properties and acreage.
Source: John Deere (manufacturer) · archived copy