Petrol lawn mower

Lightweight and easy to use, Mountfield's SP42 self-propelled petrol engine lawnmower is ideal for small to medium-sized gardens. mower. Featuring a STIGA ST120 Autochoke engine, 41cm cutting width and the option to collect or mulch the grass clippings, this mower offers extremely good value for money.
  • Powered by STIGA ST120 Autochoke 123cc petrol engine
  • Self-propelled
  • 41cm cutting width
  • 60-litre textile hybrid grass collector with bag full indicator
  • 5-year warranty (T&C's Apply)
  • Mulching plug included
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Special Price £269.00 Regular Price £309.00 Your Saving: -£40.00
Vat Included

Product details and specs

Mountfield's SP42 is a fantastic self-propelled, petrol-driven lawnmower at a great price.

A super reliable STIGA ST120 Autochoke engine and impressive 41cm cutting width combine to produce a hard-working, dependable and easy to use mower.

Featuring a robust steel chassis and a centralised lever to adjust the cutting height of the blade - choose from six cutting heights to suit the length of grass you are cutting. Grass clippings are collected into a roomy 60-litre canvas grass catcher complete with bag full indicator to let you know when its time to empty it.

Alternatively with this versatile mower you have the option to mulch the grass. Save time and add nutrients to your lawn - simply fit the mulching plug (supplied with the mower) and as you mow, clippings are finely cut and redistributed back onto the lawn surface as a natural fertiliser.

Lightweight at only 25kg and highly manoeuvrable, with fold-down handlebars for easy storage, the SP42 is a great mower for small to medium-sized gardens.

The SP42 is backed by a 5-year extended warranty (T&C's Apply)

For advice on the lawnmower best suited to your requirements please call our Technical Helpline on 0800 669 6325 or contact your local Mountfield Dealer ( who will be happy to advise you.

What's in the box

Petrol lawn mower
  • lensGrass bag
  • lensMulching plug

Technical specs

General info
1.9 kW
Power source
Engine Brand
Engine model
ST 120 OHV Autochoke Powered by STIGA
123 cm³
Engine rotation speed
2900 rpm
RPM control
Fixed rpm
Fuel tank capacity
0.75 l
Engine Oil tank capacity
0.5 l
Suggested working area
300 ㎡
Cutting system
Cutting width
41 cm
Deck material
Cutting height adjustment
Cutting height positions
6 positions
Cutting height range
22 - 65 mm
Drive system
Rear-wheel drive
Speed forward
3.7 Km/h
Collector capacity
60 l
Handlebar type
Ergonomic fixed + soft grip
200/200 grooved wheels on bushings
Front handle
Adjustable handlebar
Foldable handlebar
Washing link
Collector type
Hybrid with warn
Vibration and noise data
Guaranteed sound power level (LwA) - dB(A)
Measured sound power level dB(A)
Measured sound pressure level at operator ear dB(A)
Vibration level hand (m/s2)
Overall dimensions
Pack weight
27.4 kg
Product length
1500 mm
Product width
535 mm
Product height
1110 mm
25 kg


Should the petrol lawn mower be protected from rain?
All petrol lawn mowers are IPX4 certified, meaning that they are not damaged by rain. However, it is recommended to keep the petrol lawn mower in a garage or store it indoors. Full information can be found in the instruction manual.
Is this petrol lawnmower already assembled in the box?
The petrol lawn mower is almost fully assembled when you open the box. The main parts have been put together and the remaining elements are easy to assemble. Follow the directions in the instruction manual to ensure the petrol lawnmower is assembled correctly.
How should this petrol lawn mower be cleaned after use?
We recommend cleaning the lawn mower in the normal way after each use. Before washing the lawn mower, we suggest that any residual grass or top soil is removed using the special Mountfield scraper, which can be purchased separately. Next, the inside of the chassis can be washed with water.
Follow the steps described in the user manual.
Which fuel and engine oil are recommended for this petrol mower?
You should use petrol as fuel. In terms of engine oil, we recommend using the specific Mountifield oil, which can be purchased separately. This will guarantee the best engine performance and optimal lubrication.

Reach Information

Information on Article 33 of REACH Regulation concerning STIGA Group products. Discover more

Reach Information

181003134/0 GEARBOX G.T. CP1 Lead 7439-92-1
Component 1 Component description 1 Substance/s CAS number
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