Lawn Mowers

Allett Kensington 20B 20″ Cylinder Mower


  • Kawasaki 98cc Engine
  • 6 Bladed Cylinder – 79 Cuts/m
  • 70 Litre Plastic Catcher
  • ‘Quick-Cassette’ available extras
  • Height of Cut 6-32mm
  • Stepless micro-adjust knob
  • Steel Front Roller with Turf Rake
  • 2 Years Domestic Warranty


Allett’s precision, single-cylinder machines have for decades been the lawnmower of choice for a wide range of people and organisations, from top Premier League football clubs and professional groundsmen to keen home gardeners, united by a commitment to maintaining a superb surface on their lawns and turfs; something for which Allett mowers have a deserved reputation. By investing in one of Allett’s Kensington petrol mowers, including the 14K, 17K and 20K, you therefore not only acquire a first-rate machine, but also join a proud tradition of gardeners dedicated to achieving a luxurious manicured finish on their lawns.

The Kensington 20K has the largest cutting width of any of Allett’s Kensington range at 51 cm, and is fitted as standard with a six-blade “Quick Cartridge” cutting cylinder capable of delivering up to 79 cuts per metre. The clean and efficient cut offered by the Kensington 20K can be further improved by the addition of the optional ten-blade cutting cylinder (available separately), which slots quickly and easily into place and increases the clip rate to around 131 cuts per metre. The 20K’s cutting height can be adjusted to precision to suit your needs, over a range of 6mm-32mm, and the inclusion of a static grass rake in front of the cutting cylinder lifts grass to ensure a finer and more even cut.

In addition to the cutting cylinder, the self-propelled Kensington 20K’s potent 98cc Kawasaki four-stroke petrol engine also supplies power to the rear roller, thereby taking much of the effort out of mowing larger lawns. The front and rear stainless steel rollers also work to improve stability and manoeuvrability, as well as ensuring a crisply defined stripe effect on your finished lawn. All mowers in Allett’s Kensington range can be quickly and easily fitted with a scarifier cartridge for the removal of leaf litter and other detritus from the surface of your lawn. The British manufactured Kensington 20K also comes with Allett’s two-year warranty on parts and labour, and is ideal for anyone seeking to keep their lawn in peak condition.

Technical Data

Lawn Size Up to 350 sq m
Applications General purpose, ornamental and prestige domestic lawns
Width of Cut 20″ (50.8cm)
Power Source 98cc. Kawasaki petrol engine
Drive Method Self-Propelled
Cutting Cylinder Six-blade
Cutting Height ¼” – 1¼” (6mm-32mm)
Height-of-cut adjustment Stepless micro-adjust knob
Handles Dual bale bar for separate cylinder and rear roller drive. Throttle lever
Grassbox 70 litre
Cartridge System Yes
Options Qc 10-bladed cutting unit and Qc scarifier unit, both quickly interchangeable with the standard cutting unit
Rear Roller Double section steel with rolled edges and geared differential drive
Front Roller Zinc plated steel with bearings
Turf Rake Yes-adjustable
Engine Start Recoil
Weight 119lb (54kg)
Warranty Two-year parts and labour
Product Overview This four-stroke petrol-engined cylinder mower is recommended for keen home gardeners with lawns of up to 350 sq metres.
Comes in three cutting widths, all with six-bladed precision cutting cylinders and an adjustable static turf rake for removing thatch/moss and standing up lateral grasses.
The standard six-bladed Qc (Quick Cartridge) cutting unit can be interchanged quickly with an optional Qc 10-bladed unit or a powered scarifier.


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