Webb vs Mountfield Cordless Lawn Mower
Webb and Mountfield are two of the most recognized names in UK garden machinery, but their cordless mowers take different approaches to power, cut quality, and battery ecosystems. This comparison breaks down the key differences to help you choose the right machine for your lawn.
Quick answer
For most medium to large lawns, the Webb WEER33 offers superior build quality, a wider 33cm cut, and a more reliable steel deck than the equivalent Mountfield models. If you need a lightweight, easy-to-manoeuvre mower for a smaller garden and already own Mountfield 40V tools, the Mountfield 3340M is a solid budget-friendly pick.
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Research updated June 2026.

Webb WEER33
Steel deck, 33cm cut, and reliable 40V battery system.
| Feature | Webb WEER33 (Best Pick) | Mountfield 3340M |
|---|---|---|
| Cutting Width | 33 cm | 33 cm |
| Battery Voltage | 40V | 40V |
| Deck Material | Steel | Plastic / Composite |
| Cutting Heights | 5 position (25-75mm) | 5 position (25-75mm) |
| Grass Collector | 40 litres | 35 litres |
| Weight (with battery) | 13.5 kg | 11.2 kg |
| Mulch Capability | Yes (plug included) | Yes (plug included) |
| Warranty | 3 years | 2 years |
| Owner Rating (aggregated) | 4.6 / 5 | 4.1 / 5 |
Webb vs Mountfield: Which Cordless Mower Is Better?
Both Webb and Mountfield offer 40V cordless lawn mowers aimed at the UK homeowner market. The two most directly comparable models are the Webb WEER33 and the Mountfield 3340M. Both have a 33cm cutting width, five height adjustments, and a 40V battery platform. However, the differences in deck construction, build quality, and real-world owner satisfaction are significant.
Webb has a long-standing reputation for producing robust garden machinery, often using steel decks where competitors use plastic. Mountfield, while a well-known brand, has shifted more towards lightweight, cost-conscious designs. This comparison focuses on the key specs, performance, and long-term reliability of each model.
Cutting Performance and Deck Quality
The deck material is the single biggest differentiator. The Webb WEER33 features a pressed steel deck, which is more durable, less prone to cracking, and provides a cleaner cut due to better airflow under the deck. Owner reviews consistently praise the Webb for its cut quality on both short and long grass, with fewer instances of clogging in damp conditions.
The Mountfield 3340M uses a plastic/composite deck. While this makes the mower significantly lighter (11.2 kg vs 13.5 kg), it can flex under pressure and is more susceptible to damage from stones or bumps. Aggregated owner feedback notes that the Mountfield can struggle with thicker, wetter grass, sometimes requiring multiple passes. The plastic deck also tends to show wear and scratches more quickly than steel.
Battery System and Runtime
Both mowers operate on 40V lithium-ion battery systems. Webb uses a slide-on battery design common across its 40V range of tools (trimmers, blowers, hedge cutters). Mountfield also uses a slide-on 40V battery, but the two systems are not interchangeable. Neither brand offers a particularly large battery capacity as standard, but both accept larger Ah batteries for extended runtime.
In real-world use, the Webb WEER33 tends to deliver slightly longer runtime per charge due to its more efficient steel deck design and motor tuning. Owners report around 25-30 minutes of continuous cutting on a standard 2.5Ah battery, which is enough for a typical 150-200 sqm lawn. The Mountfield 3340M offers similar runtime but the motor works harder in thick grass, draining the battery faster.
Build Quality and Longevity
Webb has a better track record for long-term reliability. The steel deck, combined with a robust motor housing and metal handlebar fixings, means the WEER33 can withstand years of regular use. The warranty is also stronger at 3 years compared to Mountfield's 2 years.
Mountfield's 3340M is designed to be a more affordable entry point. The plastic deck and lighter construction mean it is easier to push and store, but it is not built for heavy-duty or frequent use. Owner reviews on retailer sites show a higher proportion of complaints about deck cracking and handle wobble after 12-18 months for the Mountfield compared to the Webb.
Ease of Use and Storage
The Mountfield 3340M has a clear advantage in weight. At 11.2 kg, it is noticeably easier to lift, carry, and manoeuvre, especially for users with smaller gardens or those who need to carry the mower up steps. The foldable handle design is also simpler on the Mountfield.
The Webb WEER33 is heavier but feels more substantial. The handle is more ergonomic and the central height adjustment lever is easier to operate than the Mountfield's individual wheel adjusters. The 40-litre grass collector on the Webb is also larger than the 35-litre collector on the Mountfield, meaning fewer trips to the compost heap.
What to Check Before Buying a Cordless Mower
Before choosing between Webb and Mountfield, consider your lawn size. For lawns under 100 sqm, the lighter Mountfield may be sufficient. For anything larger or if you have thick, damp grass, the Webb's steel deck and better cut quality are worth the extra weight. Also check what other 40V tools you own or plan to buy, as sticking to one battery platform saves money in the long run.
Mistakes to Avoid When Choosing a Cordless Mower
A common mistake is choosing based on price alone. The Mountfield is often cheaper, but the plastic deck can lead to frustration and earlier replacement. Another mistake is ignoring the battery ecosystem. If you already own Mountfield 40V tools, the 3340M makes sense. If starting from scratch, the Webb platform offers better build quality and a wider range of tools. Finally, do not assume all 33cm mowers are the same. The deck material and motor quality make a big difference in cut consistency and longevity.
FAQs
Is Webb or Mountfield a better brand for lawn mowers?
Webb generally offers better build quality with steel decks and longer warranties, while Mountfield focuses on lighter, more affordable designs.
Are Webb and Mountfield batteries interchangeable?
No, Webb and Mountfield use different 40V battery systems and are not compatible with each other.
Which mower is better for thick or wet grass?
The Webb WEER33 with its steel deck and more powerful motor handles thick and wet grass much better than the Mountfield 3340M.
How long does the battery last on a Webb WEER33?
On a standard 2.5Ah battery, you can expect around 25-30 minutes of continuous cutting, enough for a 150-200 sqm lawn.
Is the Mountfield 3340M easy to store?
Yes, the Mountfield 3340M is lightweight and has a simple foldable handle, making it very easy to store in a small shed.
Can you mulch with the Webb WEER33?
Yes, the Webb WEER33 comes with a mulch plug that allows you to finely chop grass clippings and return them to the lawn.
What is the cutting width of the Mountfield 3340M?
The Mountfield 3340M has a 33cm cutting width, which is ideal for small to medium-sized gardens.
Which mower has a better warranty?
The Webb WEER33 comes with a 3-year warranty, while the Mountfield 3340M has a 2-year warranty.
Is the Webb WEER33 heavier than the Mountfield?
Yes, the Webb WEER33 weighs 13.5 kg compared to the Mountfield 3340M at 11.2 kg, due to its steel deck.
Can I use a larger battery on the Webb or Mountfield mower?
Yes, both mowers accept higher Ah batteries (e.g., 4.0Ah or 5.0Ah) from their respective 40V ranges for longer runtime.
Our verdict
The Webb WEER33 is the clear winner for most users, offering a steel deck, better cut quality, and a longer warranty. It is the best overall cordless mower for medium lawns. The Mountfield 3340M is a decent budget option if you need a very lightweight mower for a small garden and already own Mountfield 40V tools, but the plastic deck and lower owner ratings make it a compromise.