Best 21 Petrol Lawnmower Deals Online in the UK (25 Deals Found)

Last Updated - 04/10/2026 Sort By:

Best Choice
HYUNDAI

New
Hyundai 224cc Petrol Lawnmower Self-Propelled, 53cm / 21" Cutting Width, Electric Push-Button Start, 4-in-1 Mulching Rea
Powerful 224cc Hyundai Engine: Powered by a reliable 224cc Euro 5 Hyundai OHV 4-stroke petrol engine producing 4.4kW, de

£400.00
COBRA

New
Cobra MX534SPCE 53cm (21in) Petrol Lawnmower with 4 Speed Drive, Electric push button start system
53CM (21in) WIDE CUT - petrol Lawnmower with steel deck and 4 speed drive system, from 2.5km/h to 3.9km/h speeds

£389.00
New
ParkerBrand 21" Self-Propelled Petrol Lawn Mower – 173cc Engine, Easy Manoeuvr
No cash alternative.

£223.44
HYUNDAI

New
Hyundai 20"/51cm 196cc Electric-start Self-propelled Petrol Lawnmower, 6 Cutting Heights, Large 70l Grass Collector, Fol
508mm / 20" cutting width: Ideal for medium to large lawns

£453.24
New
COBRA MX534SPCE PETROL LAWNMOWER SELF PROPELLED ELECTRIC START 21" 4 SPEED
21" Cobra Self Propelled / 4 Speed The Cobra MX534SPCE 196cc electric start lawnmower has a cutting width of 53cm and is

£399.99
Best Value
HYUNDAI

New
Hyundai 18” 46cm Self-Propelled Petrol Lawnmower, 139cc 4-Stroke Engine, 4-in-1 Mulch Bag Side & Rear Discharge, 60L Gra
Self-Propelled Rear Wheel Drive System – Engine-powered drive moves the mower forward for effortless cutting, reducing s

£259.99 £289.99
COBRA

New
MX534SPH 53cm (21in) Petrol Rotary Lawnmower powered by a Honda GCV170 engine, 4 Drive speeds
Powered by Honda GCVX170 engine – Renowned for easy starting, smooth power delivery and outstanding reliability, ideal f

£469.00
New
COBRA MX534SPH PETROL LAWNMOWER HONDA SELF PROPELLED 21" AWARD WINNING MODEL
21" Honda Self Propelled / 4 Speed The Cobra MX534SPH self-propelled lawnmower has a 4-speed gearbox and a cutting width

£469.99
HYUNDAI

New
Hyundai 51cm Electric Start Self Propelled Petrol Lawn Mower, 196cc 4-in-1 Lawnmower, 60L Grass Collector, Mulching, Sid
Electric push-button start – Start mowing quickly and easily at the push of a button, with a recoil start also included

£339.99
New
Senci LMA18S21 144cc 460mm Self Propelled Petrol Lawnmower
Product Code LMA18S21.

£366.99
HYUNDAI

New
Hyundai 16" / 40cm Petrol Lawnmower, 139cc 4-Stroke Engine, Hand Push, 7 Cutting Heights 25-75mm, 40L Grass Bag - 3 Year
Reliable 139cc Petrol Engine: Powerful 4-stroke engine delivers consistent cutting performance for small to medium garde

£159.99 £174.99
Hyundai Power Products

New
Hyundai 21"/53cm 196cc Petrol Lawnmower, Self propelled Roller Lawnmower with 5 Cutting Heights, Large 70L Collection Ba
Ideal for larger lawns: 530mm / 21" cutting width

£439.99
New
Petrol Lawnmower Self Propelled RocwooD 173cc 21″ 4 Stroke OHV Engine Mulching
RocwooD 21″ Self-Propelled Petrol Mulching Lawnmower – RWLMSP21.

£319.99 £339.99
21% Off
Mountfield

New
Mountfield SP46 Petrol Lawnmower, Self-Propelled, 46 cm Cutting Width, 139 cc ST140 Autochoke Petrol Engine, Up to 500 m
A MODEL FOR EVERY NEED - The STIGA 139cc petrol engine delivers reliable power for tough mowing tasks on medium to large

£244.79 £309.80
New
Mountfield SP41 Petrol Lawnmower, Self-Propelled, 39cm cutting width, 123cc
40-litre textile grass collector.

£299.46
Mountfield

New
Mountfield Petrol Lawnmower SP53, 166 cc, 51 cm – Self-Propelled, Mulching – Lawns up to 1,800 sqm
A MODEL FOR EVERY NEED - The petrol lawnmower features a robust steel cutting deck and a STIGA ST170 OHV Autochoke 166cc

£349.98
New
Yard Force 40cm Hand Push Petrol Lawnmower 127cc GMR40

£151.50
New
Petrol Lawn Mower

£254.11
New
Snapper Pulley 2-4521 7024521 7024521YP Snapper 21” Lawn Mower Polyvee Pulley
Snapper part numbers 32-4521, 2-4521, 7024521, 7024521YP.

£16.14
New
21” Self‑Propelled Petrol Lawnmower – 173cc, Mulch & Collect
173cc Four-Stroke Petrol Engine: Strong, dependable power for tackling thicker, taller grass and tougher lawns.

£261.59
New
COBRA MX534SPCE PETROL LAWNMOWER SELF PROPELLED ELECTRIC START 21" 4 SPEED
Robins - Cobra MX534SPCE.

£399.00
New
Ariens LM21 Petrol Lawnmower Grassbox
Ariens LM21 lawnmower genuine grassbox.

£86.95
New
Petrol Lawnmower Self Propelled RocwooD 173cc 21″ 4 Stroke OHV Engine Mulching
RocwooD 21″ Self-Propelled Petrol Mulching Lawnmower – RWLMSP21.

£319.99 £339.99
New
Cobra MX534SPH 21" Petrol Lawnmower - Self-Propelled Honda Engine, 4-Speed, 65L
Why Choose the Cobra MX534SPH?.

£469.95
New
Mountfield HP41 Hand-Propelled Petrol Lawnmower
Mountfield's HP41 hand-propelled petrol-driven lawnmower features a compact 39cm cutting width - ideal for small sized g

£176.47

25 21 Petrol Lawnmower deals are available from: Amazon, eBay stores, starting from £16.14.
The biggest discount we found is 21% on Mountfield SP46 Petrol Lawnmower, Self-Propelled, 46 cm Cutting Width, 139 cc ST140 Autochoke Petrol Engine, Up to 500 m², Includes 60 Litre Grass Collector at Amazon.
The lowest price we found is £16.14 while the highest is £469.99.
Prices for the best 21 Petrol Lawnmower deals average at £308.86.
Last updated on October 4, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for 21 Petrol Lawnmower.