42" MD21d - Diesel Walker Mower Catcher Mower


Tractor & Deck


MD21d - Diesel Walker Mower 42 inch Collection Model

A favourite tractor for municipal commercial mowing contractors, institutional and government customers, the MD uses a powerful Kubota, three-cylinder, liquid-cooled diesel engine that has owned its place within the lawn contracting industry for decades.

  • 20.9-HP, Kubota three cylinder diesel engine, liquid-cooled
  • Electric radiator fan with reversible self-cleaning action
  • 42 inch shaft driven grass collection deck
  • Shock-mounted instrument panel
  • Remote air intake for engine
  • 10.0 bushel - 12.4 cu. ft. catcher
  • Deck sizes from 36 to 74 inches
  • 10.5″ - 27 cm grass handling blower
  • Splined PTO drive shaft with quick-disconnect coupler
  • 17.8 litre fuel tank
  • 11.3 kph ground speed
  • Grammer suspension seat
  • Also available as a Side Discharge (SD) model

Walker Mowers System

All Walker Mowers are part of a family system; you purchase a tractor unit and then a deck for your requirements. This system includes easily interchangeable decks, assorted wheels and tyres for slope and bank mowing, as well as some of the best mulching blade and deck combinations for commercial applications. When you purchase a Walker Mower you have access to a huge range of accessories designed around mowing solutions.

MD Diesel Deck Possibilities?

The MD21d Walker Mower spoils you for choice! You can run combination mulch, side discharge and collection decks, as well as dedicated mulching decks - many sizes available from 42 inches up; a range of specialty collection decks from 36 to 52 inches wide. There are also dedicated side discharge decks 52, 56, 62 and 74 inches wide.

The shaft drive system allows you to change decks relatively easily; so you can have one mower tractor with multiple decks to allow you flexibility in one mowing unit.

The Kubota, three-cylinder, liquid-cooled diesel engine drives all of these decks amazingly efficiently, delivering almost unrivalled fuel economy as low as 2.88 litres per hour! Unbelievable!
Compact and Easy

Trimming around and under landscaping is easy and safe with your Walker Mower & the diesel has torque to spare - power across the whole working range.


Outfront mowing gives you greater balance on hills and allows faster turning across landscapes.

Easy Deck Servicing

Attend to sharpening and blade inspection & replacement easily.

Easy Maintenance

Easily tilt the mower body to service filters or clean the mower with a hand blower.

Best Seat in The House

Outfront mowers allow you to see and work closer to obstacles, closer mowing - less grass trimming - more productivity.

Effortless Steering

Forward and reverse control are on your right hand; left and right steering is done with the fingers of your left hand – fast & easy!

Engine Manufacturer:

Walker Specifications

Kubota, D722, 3 cylinder
719 cc - 43.9 cu in
Max Power:
15.5 Kw - 20.9 hp @ 3600 rpm
Max Torque:
34 ft lbs
Fuel Tank Capacity:
17.8 liters
Deck Width:
42 inch collection deck
Fuel Use Per Hour:
2.88 liter