Rank #2 in Best Petrol Lawn Mowers 2026: 10 Ranked, Ad Claims Checked
Mountfield SP41 Self-Propelled 39cm Petrol Mower
Price and rating as shown on Amazon when we collected them. Both change.
The Mountfield SP41 is a self-propelled petrol rotary mower with a 39cm cutting width, a 123cc Stiga ST120 Autochoke engine and a 40L grass collector. It is listed at £199.98 with a 4.3 out of 5 rating from 846 ratings, and it takes the number 2 slot in this guide of 15 petrol mowers. At 39cm it is one of the narrower decks on the list — the listing gives a maximum working area of 250m and calls it ideal for small- or medium-sized gardens.
The finding on this listing is the cutting height. The bullets describe five positions running from 22mm to 80mm; the spec table underneath them gives a minimum adjustable cutting height of 22mm and a maximum of 70mm. The two agree at the bottom of the range and disagree at the top by 10mm. Weight tells the same story: the bullets quote a "light pack weight of 22.9kg", while the Item Weight field says 20 kg. Everything on this page is taken from the Mountfield SP41's Amazon listing, not from testing we carried out ourselves.
How those 846 ratings break down
An average hides its own shape. This is the spread behind the 4.3 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £199.98 |
|---|---|
| Rating | 4.3 out of 5 from 846 ratings |
| Cutting width | 39cm — the ad copy and the spec table both give 39 |
| Engine | Stiga ST120 Autochoke petrol engine, 123cc |
| Cutting height, bullets | 5 positions, 22–80mm |
| Maximum adjustable cutting height (as listed) | 70mm in the spec table, against 80mm in the bullets |
| Item weight (as listed) | 20 kg, against a "light pack weight of 22.9kg" in the bullets |
| Grass collector | 40L, included |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Great mower, easy to assemble, cuts very well and collect well too. Certainly taken the strain out of mowing the lawn.”
Verified purchase“Much lighter easier to use than previouse expensive mower”
What it is up against
The rivals it was ranked against in Best Petrol Lawn Mowers 2026: 10 Ranked, Ad Claims Checked.
Questions people ask
How wide a strip does the Mountfield SP41 cut?
39cm, the figure given in both the ad copy and the spec table.
What engine does the Mountfield SP41 use?
A Stiga ST120 Autochoke petrol engine with a 123 cubic capacity, according to both the title and the bullets.
How high can the Mountfield SP41 cut?
The bullets say the five positions run from 22-80mm, but the spec table lists a maximum adjustable cutting height of 70mm against a minimum of 22mm.
How much does the Mountfield SP41 weigh?
The bullets quote a "light pack weight of 22.9kg"; the Item Weight field in the spec table says 20 kg.
What size garden is the Mountfield SP41 for?
The listing gives a maximum working area of 250m and describes it as ideal for small- or medium-sized gardens.
What comes in the box with the Mountfield SP41?
One SP41 self-propelled lawnmower, a 0.75L fuel tank, a 0.5L engine oil tank and a 40L grass collector.
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