Kensington Mower Petrol 20B

The Allett Kensington 20B is a 20" petrol-powered cylinder mower for homeowners who want maximum cutting width, strong stripes, and the flexibility of Allett’s Quick Change cartridge system.

It is the largest mower in the Kensington homeowner range and is suited to larger premium lawns where petrol power, fine height adjustment, and cartridge-based lawn care are preferred.

• Cutting width: 51 cm / 20"
• Overall width: approximately 68 cm / 27"
• Engine: 127cc Briggs & Stratton XR550 petrol engine
• Drive: self-propelled
• Recommended lawn size: up to approximately 900 m²
• Height of cut: 6 mm to 32 mm with variable micro-set adjustment
• Cutting cylinder: 6-blade precision cutting cylinder included
• Cuts per metre: 79
• Cartridge system: compatible with 20" Allett Quick Change cartridges
• Grass box: 70 litre grass box
• Weight: approximately 56.6 kg with grass box
• Fuel tank: 2 litre fuel tank

Cartridge compatibility

The Kensington 20B is compatible with 20" Allett Quick Change cartridges, including the scarifier, aerator, lawn brush, dethatcher, verticut cartridge, 10-blade cutting cylinder, and other compatible 20" QC cartridge options.

Height of cut

• S = 6 mm
• 1 = 13 mm
• 2 = 19 mm
• 3 = 26 mm
• 4 = 32 mm
• Micro-adjustment: approximately 0.75 mm per click

Key details

• Spring tine comb lifts grass before cutting
• Zinc-plated steel front roller helps produce a defined striped finish
• Double-section steel rear roller with differential helps avoid wheel marks
• Auxiliary wheel kit included
• Three handlebar height positions plus folding handlebar
• 2 years / 24 months warranty for homeowner use; 3 months for sports/professional use

Need help choosing between Kensington 14, 17, and 20? Contact Allett Canada before ordering and we can help match the mower and cartridge setup to your lawn size and mowing goals.