Updated:22 October 2026
Rank 1-15 of the best Petrol Lawn Mower 51cm Cutting Width
Our recommendation Price Customer rating
1. Comparison winner
Hyundai 20" Self-propelled Petrol Lawnmower
Hyundai 20" Self-propelled Petrol Lawnmower
Available immediately
free shipping
  • 510 mm cutting width for medium to large gardens
  • 196 cc 4-stroke petrol engine for easy starting and low fuel consumption
  • self-propelled system eliminates the need to push by selecting one of four walking speeds
Our rating
9,8
very good
2. Best value
Hyundai 20" Petrol Lawnmower 196cc
Hyundai 20" Petrol Lawnmower 196cc
Available immediately
free shipping
  • 508 mm cutting width for medium to large lawns
  • 196 cc engine for easy starting and low fuel consumption
  • self-propelled system with 4 walking speeds for ease of use
Our rating
9,8
very good
3. Bestseller
STIGA Combi 53 S Petrol Lawn Mower, Self-Propelled, 166 cc, 51 cm Cutting Width, 3-in-1 (Collection, Mulching & Rear Discharge), 60 L Grass Collector, Yellow
STIGA Combi 53 S Petrol Lawn Mower, Self-Propelled, 166 cc, 51 cm Cutting Width, 3-in-1 (Collection, Mulching & Rear Discharge), 60 L Grass Collector, Yellow
Available immediately
free shipping
  • 46 cm cutting width for efficient mowing of medium-sized lawns
  • 2.8 kilowatts of engine power at 2900 rpm
  • centralised cutting height adjustment with 6 settings from 22 mm to 65 mm
Our rating
9,6
very good
Murray EQ2-500X 20" Self-Propelled Petrol Lawnmower
Murray EQ2-500X 20" Self-Propelled Petrol Lawnmower
Available immediately
free shipping
  • cutting width: adaptable for various mowing conditions
  • engine power: 7.6Nm maximum torque for powerful performance
  • height adjustment: 6-step central system from 25 mm to 75 mm
Our rating
9,6
very good
Webb WER510ES Classic 51 cm Self-Propelled Electric-Start Petrol Lawn Mower
Webb WER510ES Classic 51 cm Self-Propelled Electric-Start Petrol Lawn Mower
Available immediately
free shipping
  • 51 cm cutting width enables you to cover more ground in fewer passes
  • 173 cc engine provides reliable power for mowing medium to large lawns
  • Self-propelled drive system moves the mower forward for you, reducing manual effort
Our rating
9,6
very good
Cobra M51SPCVX 20" Self-Propelled Petrol Lawnmower
Cobra M51SPCVX 20" Self-Propelled Petrol Lawnmower
Available immediately
free shipping
  • 51 cm cutting width for precise mowing close to borders and walls
  • 149 cc engine for consistent cutting performance
  • self-propelled drive system reduces effort and operator fatigue
Our rating
9,5
very good
Hyundai 196cc Petrol Lawnmower, Self Propelled, 51cm Blade
Hyundai 196cc Petrol Lawnmower, Self Propelled, 51cm Blade
Available immediately
free shipping
  • cutting width of 508mm suitable for medium to large lawns
  • petrol engine with 196cc power offers easy starting and low fuel consumption
  • self-propelled system eliminates the need to push, simply steer
Our rating
9,5
very good
Mountfield SP53A Petrol Lawnmower 166cc 51cm Self-Propelled Mulching for lawns up to 650 sqm
Mountfield SP53A Petrol Lawnmower 166cc 51cm Self-Propelled Mulching for lawns up to 650 sqm
Available immediately
free shipping
  • cutting width of 51 cm for a wide, even finish
  • engine displacement of 166 cubic centimetres for strong, reliable power across large lawns
  • self-propelled drive system to ease mowing on slopes and large areas
Our rating
9,5
very good
Mountfield SP53 Petrol Lawnmower, 51cm, Self-Propelled
Mountfield SP53 Petrol Lawnmower, 51cm, Self-Propelled
Available immediately
free shipping
  • cutting width of 51 cm
  • powered by petrol engine
  • self-propelled system for easy operation
Our rating
9,3
good
Mountfield SP53 Elite Petrol Lawnmower
Mountfield SP53 Elite Petrol Lawnmower
Available immediately
free shipping
  • 51cm cutting width
  • 167cc engine
  • single lever adjustable height with 5 positions from 27 to 90mm
Our rating
9,3
good
Scheppach MS173-51 Self-Propelled Petrol Lawn Mower, 51cm, Mulching, 65L Bag
Scheppach MS173-51 Self-Propelled Petrol Lawn Mower, 51cm, Mulching, 65L Bag
Available immediately
free shipping
  • engine power of 4.1 horsepower from a 173cc four-stroke petrol engine
  • self-propelled drive with wheel drive and ball-bearing wheels for smooth movement on large lawns
  • cutting height adjustable in seven central settings from 25 millimetres to 75 millimetres
Our rating
9,1
good
Dellonda 170cc 20" Self-Propelled Petrol Lawnmower DG102
Dellonda 170cc 20" Self-Propelled Petrol Lawnmower DG102
Available immediately
free shipping
  • 51cm cutting width for accurate and efficient mowing of medium to large gardens
  • 170cc engine with recoil pull start for powerful performance
  • self-propelled drive system for reduced effort during mowing
Our rating
9,1
good
Hyundai 20-inch Self-Propelled Petrol Lawnmower with Electric Start, 196cc 4-Stroke, 4-in-1 Mulch/Bag/Side & Rear Discharge, 60L Grass Box, Black Edition
Hyundai 20-inch Self-Propelled Petrol Lawnmower with Electric Start, 196cc 4-Stroke, 4-in-1 Mulch/Bag/Side & Rear Discharge, 60L Grass Box, Black Edition
Available immediately
free shipping
  • 51 cm cutting width enabling more ground per pass
  • 196 cc four-stroke petrol engine delivering 5.5 hp for high torque performance
  • self-propelled rear-wheel drive for easier mowing on large lawns and gentle slopes
Our rating
9,0
good
Hyundai 20-inch Self-Propelled Petrol Lawn Mower, 196cc 4-stroke, 4-in-1 with Side & Rear Discharge, 60L Grass Box, Black Edition
Hyundai 20-inch Self-Propelled Petrol Lawn Mower, 196cc 4-stroke, 4-in-1 with Side & Rear Discharge, 60L Grass Box, Black Edition
Available immediately
free shipping
  • cutting width of 51 cm enables more ground covered per pass for faster mowing of medium to large gardens
  • 196 cc four-stroke petrol engine delivering around 5.5 horsepower with high torque to cut through thick grass
  • self-propelled rear-wheel drive reduces effort by pulling the mower forward on large lawns and slopes
Our rating
9,0
good
VonHaus 171cc Petrol Self-Propelled Lawn Mower with 60L Bag, 51cm Width, 8-Position Height Settings
VonHaus 171cc Petrol Self-Propelled Lawn Mower with 60L Bag, 51cm Width, 8-Position Height Settings
Available immediately
free shipping
  • a cutting width of 51 centimetres allows you to cover more ground in fewer passes
  • a 171 cubic centimetre petrol engine providing reliable starting and steady power for mowing thick grass
  • self-propelled drive moves the mower forward reducing effort on slopes and larger lawns
Our rating
8,9
good

Similar Petrol Lawn Mower 51cm Cutting Width comparisons

Petrol Lawn Mower 51cm Cutting Width buying guide: How to choose the right product from the above Petrol Lawn Mower 51cm Cutting Width test or comparison

Understanding the Benefits of a 51cm Petrol Lawn Mower

Power and Performance at Your Fingertips

A 51cm petrol lawn mower offers a great blend of power and efficiency, making it suitable for a wide range of gardens. With its robust engine, it cuts through grass effortlessly, even when the vegetation is thick or wet. This means that we can tackle various lawn conditions without worrying about the mower bogging down or struggling to keep pace. The added power translates to quicker mowing times, allowing us to spend less time on this chore and more time enjoying our outdoor space.

Ideal for Medium to Large Lawns

This size is particularly advantageous for medium to larger lawns, where manoeuvrability and cutting width become important factors. A 51cm cutting deck can streamline our mowing process, letting us cover more ground with each pass. Whether you’re maintaining a backyard paradise or a larger estate, this mower can handle the job effectively, giving uniform results across the entire lawn.

Durable and Versatile

Investing in a petrol mower of this size also ensures durability. These machines are designed to withstand the rigours of regular use and adverse weather conditions, significantly extending their lifespan. Plus, petrol mowers often allow for additional features like mulching and collection options, giving us the flexibility to manage our lawn according to our needs and preferences.

Key Features to Look For When Selecting Your Mower

Engine Quality

First and foremost, we need to consider the engine quality. Look for an engine that combines power with efficiency. A reliable brand often provides lower emissions and better fuel consumption, so we can mow longer without needing frequent refuels. Machines with 4-stroke engines are often a great choice for balancing power and cleanliness.

Cutting Height Adjustment

Another essential feature to consider is the cutting height adjustment mechanism. We want a mower that allows us to adjust the cutting height easily, accommodating different grass types and garden conditions. Ideally, look for a model with a wide range of height options, so we can achieve our desired grass length without hassle.

Grass Collection System

Next, examine the grass collection system. A mower equipped with a spacious, easy-to-empty grass box makes our job much more manageable. Look out for features that indicate how efficiently the mower collects grass; for instance, a rear discharge option can keep our lawn looking tidy while reducing our cleanup time.

How to Choose the Right Size for Your Lawn

Evaluating Your Lawn Size

To choose the right mower size, we should first evaluate our lawn. For gardens around 1000 square metres or more, a 51cm mower generally strikes a balance between mobility and efficiency. If your lawn has complex shapes or tight corners, it’s beneficial to consider how quickly we can navigate with this mower without missing patches or mowing too closely to borders.

Tackling Lawn Complexity

If our garden features more obstacles like flower beds, trees, or pathways, the agility of a 51cm mower becomes crucial. This size allows us to manage tricky areas more effectively without compromising on power or cutting depth, suitable for landscaped gardens with intricate designs.

Maintenance Tips for Longevity and Performance

Regular Cleaning and Care

Maintaining our 51cm petrol lawn mower is essential for ensuring its longevity and optimal performance. After each use, a good practice is to clean the underside of the mower deck to prevent grass build-up, which can hinder performance. A soft brush or cloth will suffice in most cases. We should also ensure the air filter is checked and cleaned regularly to allow the engine to breathe properly and operate efficiently.

Oil and Fuel Management

Additionally, keeping an eye on oil levels and fuel quality can greatly affect the mower’s performance. Regular oil changes help maintain engine health, while using fresh petrol prevents starting difficulties and ensures the engine runs smoothly. We can make the most of our mower by ensuring that petrol is stored correctly and used within an optimal timeframe.

Maximising Efficiency: Operating Your Petrol Lawn Mower

Optimal Mowing Techniques

To operate our petrol mower efficiently, we should adopt proper mowing techniques. Mowing during dry weather conditions helps reduce the workload on the mower while maintaining a clean cut. Moreover, mowing in set patterns—like straight lines or a spiraling technique—can prevent us from missing patches of grass and improves uniformity.

Use of Mulching and Collecting Options

Understanding how to utilise the available features, such as mulching or side discharging, can also maximise efficiency. Mulching not only reduces waste but also provides natural fertilisation, improving lawn health. We should familiarise ourselves with our mower’s settings and capabilities to create the best mowing strategy for our garden.

Table of contents
  1. Understanding the Benefits of a 51cm Petrol Lawn Mower
  2. Key Features to Look For When Selecting Your Mower
  3. How to Choose the Right Size for Your Lawn
  4. Maintenance Tips for Longevity and Performance
  5. Maximising Efficiency: Operating Your Petrol Lawn Mower

Overview

1. Comparison winner
Hyundai 20" Self-propelled Petrol Lawnmower
Our rating
9,8
very good
Hyundai 20" Self-propelled Petrol LawnmowerAvailable immediately
2. Best value
Hyundai 20" Petrol Lawnmower 196cc
Our rating
9,8
very good
Hyundai 20" Petrol Lawnmower 196ccAvailable immediately
3. Bestseller
STIGA Combi 53 S Petrol Lawn Mower, Self-Propelled, 166 cc, 51 cm Cutting Width, 3-in-1 (Collection, Mulching & Rear Discharge), 60 L Grass Collector, Yellow
Our rating
9,6
very good
STIGA Combi 53 S Petrol Lawn Mower, Self-Propelled, 166 cc, 51 cm Cutting Width, 3-in-1 (Collection, Mulching & Rear Discharge), 60 L Grass Collector, YellowAvailable immediately
Murray EQ2-500X 20" Self-Propelled Petrol Lawnmower
Our rating
9,6
very good
Murray EQ2-500X 20" Self-Propelled Petrol LawnmowerAvailable immediately
Webb WER510ES Classic 51 cm Self-Propelled Electric-Start Petrol Lawn Mower
Our rating
9,6
very good
Webb WER510ES Classic 51 cm Self-Propelled Electric-Start Petrol Lawn MowerAvailable immediately
Cobra M51SPCVX 20" Self-Propelled Petrol Lawnmower
Our rating
9,5
very good
Cobra M51SPCVX 20" Self-Propelled Petrol LawnmowerAvailable immediately
Hyundai 196cc Petrol Lawnmower, Self Propelled, 51cm Blade
Our rating
9,5
very good
Hyundai 196cc Petrol Lawnmower, Self Propelled, 51cm BladeAvailable immediately
Mountfield SP53A Petrol Lawnmower 166cc 51cm Self-Propelled Mulching for lawns up to 650 sqm
Our rating
9,5
very good
Mountfield SP53A Petrol Lawnmower 166cc 51cm Self-Propelled Mulching for lawns up to 650 sqmAvailable immediately
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