John Deere

John Deere Z320M 21.5HP 42" ZTrack Zero-Turn Mower

No reviews yet Write a Review



✓ Free professional assembly and calibration

✓ Free full tank of fuel
✓ Free onsite handover and instruction

✓ $99 flat rate delivery within the RDO Equipment Online Store Mower Delivery Zone (Read more)


With comfortable seats, easy access storage, and large rear drive tires, the Z300 Series makes yard work a breeze. And thanks to the Accel Deep™ Mower Deck, optional MulchControl™ kits, and up to 7mph travel speed, it gets the job done fast so you can get the most out of your lawn.

The 21.5-HP, V-Twin John Deere engine has plenty of power and torque for the Z320M to handle tough mulching, mowing, and bagging conditions – most suitable for a flat with obstacles terrain, up to one acre. Comfortable 20-in high-back seat, cup holder, side and under seat storage compartments, color coded controls for easy identification and low-fuel warning light visible in daylight.

Premium engine is powerful, reliable, and durable

A 16.0 kW (21.5-hp) V-twin engine with 726-cc (44.3-cu in.) displacement provides plenty of power and torque to handle tough mulching, mowing, and bagging conditions:

  • V-twin cylinder design for greater torque, lower vibration, and improved sound quality
  • Full-pressure lubrication and cast-iron sleeves to extend engine life
  • Engine model FR651V
  • Rear engine guard protects the engine from damage

Get an even cut with the 42-in. (107-cm) Accel Deep™ (42A) Mower Deck

  • The 42-in. (107-cm) Accel Deep Mower Deck is a stamped-steel, deep, flat-top design that delivers excellent cut quality, productivity, cleanliness, durability, and versatility. Optimal performance and dispersion of clippings is provided, even at faster mowing speeds.
  • 12.6 cm (4.97 in.) deep throughout the entire deck shell for optimum mowing, mulching, and bagging performance.
  • Stamped-steel design eliminates sharp edges and corners where material can build up and diminish mowing performance
  • Mower deck suspended from the vehicle for a smooth and level cut
  • 6.4 mm (0.25 in.) cut-height increments allow the mower to be set at the desired cut height
  • Compatible with efficient 230 L (6.5 bu) two-bag cut-and-throw material collection system

Comfortable ride delivered by operator station with adjustable controls and seat position

The operator station is designed for operator comfort and convenience when operating all controls:

  • Excellent visibility forward and to the trim side of the deck makes operation easy and comfortable for the operator.
  • Controls are color coded for easy identification.
  • Translucent fuel tank displays fuel level.
  • Twin-lever controls adjust, using cut-height pin/socket, for convenience and operator comfort.
  • A shock absorber dampens motion control lever movement to give smooth operation.

Great appearance, reliability, and performance delivered by a heavy-duty design

ZTrak Mowers are designed around a heavy-duty formed and welded steel frame for strength and reliability. Large front caster wheels and large rear drive wheels provide several operator benefits:

  • Smoother ride
  • Better slope performance
  • More operator comfort over uneven ground
  • Better traction

Efficiency and durability from dual transmissions with large, 2.5 cm (1 in.) diameter axles

Dual transmissions efficiently power the ZTrak™ mower forward and reverse and give steering capability:

  • Transmissions are set low in the vehicle for excellent hillside stability.
  • Hydro-Gear® transmissions are reliable and durable.
  • Maintenance-free unitized transmissions are sealed and have no hose connections to leak hydraulic fluid.

Easy refueling with a conveniently located fuel tank

The fuel tank holds 11 L (3 U.S. gal) of fuel. It is located low on the left side of the machine:

  • Fuel-fill opening is located low and angled for easy refueling.
  • Large, 5.1 cm (2 in.) fuel-fill opening reduces the chance of spilling when adding fuel.
  • Cap is tethered to the fuel tank to prevent the fuel cap from getting misplaced.

Translucent fuel tank displays fuel level.

Convenient machine service includes 3-year or 200-hour bumper-to-bumper warranty

A convenient service interval decal provides basic maintenance information. It provides a quick reference for keeping recommended service up to date.

Z300 Series
Deck Size:
107cm (42")
16 kW (21.5hp)
Mowing Area:
Up to 2 Acres
Flat / Some Slopes


Product Brochure
Parts Reference Guide