Ask the Experts on 0800 669 6325 or Contact us

Mon - Fri 10am-4pm 

open_in_full

S421R HP

Petrol lawn mower

  • Free White Glove delivery Free delivery: the product will be assembled and prepared by a local Mountfield authorised dealer.
A hand-propelled, petrol mower with a rear roller to create a those all important lawn stripes all combine to make Mountfield's S421R HP a superb choice. The powerful STIGA ST120 Autochoke engine makes light work of all lengths of grass and the 41cm wide cutting blade nips effortlessly around small lawns. It’s a great lawnmower!
  • Powered by STIGA 123 cc petrol engine
  • Rear Roller for a lovely striped finish
  • Hand-propelled
  • 41cm cutting width
  • 55-litre hybrid with full indicator grass collector
  • Centralised height of cut adjustment
  • Free Shipping
£399.00
Vat Included

Product details and specs

To produce that classic British striped lawn you need a rear roller mower. If you are also looking to nip around a small lawn and cut various lengths of grass with ease, then Mountfield's S421R HP is the lawnmower for you.

This fantastic hand-propelled mowing machine is powered by the STIGA ST120 Autochoke engine, producing 1.9kW of power at 2900 rpm, giving you plenty of oomph to get the job done.

Featuring an impressive 41cm wide cutting blade with grass clippings being collected into the handy 55-litre canvas hard top collection bag. When the bag is full there is a handy indicator to let you know to empty it. *Top tip: grass clippings mixed with equal amounts of woody garden material produces some of the best garden compost ever!

This is a no-nonsense, efficient mower that is dependable, sturdy - the steel chassis sees to that and is backed by a five-year extended warranty (T&C's Apply). The S421HP is a real beauty if you want that perfectly striped lawn.

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 (https://www.mountfieldlawnmowers.co.uk/find-a-dealer) who will be happy to advise you.

Delivery Information: There is an option to have this Lawnmower delivered by our premium ‘Ready to Mow’ white glove delivery service. To qualify for this service please ensure you select this delivery service at checkout. Your local Mountfield authorised dealer will prepare the machine with a thorough pre-delivery inspection and deliver it ready to use at a time convenient to you. They will also demonstrate its safety features and how to use the machine.

Please allow up to 7 working days for delivery, however, if your local dealer has the machine in stock then delivery would normally be much sooner.
This premium delivery service is available free of charge with this machine.

What's in the box

S421R HP
S421R HP
Petrol lawn mower
  • lensGrass bag
  • lensRoller

Technical specs

General info
EAN/UPC
8008984817395
SKU
299434043/M19
Power
Power source
Petrol
Power
1.9 kW
Engine Brand
STIGA
Engine model
ST 120 OHV Autochoke Powered by STIGA
Displacement
123 cm³
Engine rotation speed
2900 rpm
RPM control
Fixed rpm
Starter
Recoil
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
Steel
Cutting height adjustment
Centralized
Cutting height positions
5 positions
Cutting height range
20 - 70 mm
Drive system
Driving
Push
Equipment
Collector capacity
55 l
Handlebar type
Ergonomic + soft grip
Wheels
180 mm /ROLLER grooved wheels on ball bearings
Front handle
Yes (bumper)
Adjustable handlebar
Yes
Foldable handlebar
Yes
Collector type
Hybrid with warn
Vibration and noise data
Vibration level hand (m/s2)
7.5
Guaranteed sound power level (LwA) - dB(A)
96
Measured sound power level dB(A)
95
Measured sound pressure level at operator ear dB(A)
81.2
Overall dimensions
Pack weight
33.3 kg
Product length
1420 mm
Product width
490 mm
Product height
1120 mm
Weight
30 kg

Support

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 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 oil, which can be purchased separately. This will guarantee the best engine performance and optimal lubrication.
How should the oil level be measured on this petrol lawn mower?
To correctly measure the oil level, you need to make sure the petrol lawnmower is on a flat surface, unscrew the cap which has a built-in dipstick for measuring, clean off any oil on the dipstick and reinsert it without screwing it in. Take the dipstick back out and check the level, which must lie between the MIN and MAX values. Top up, if required, and screw the cap back on. Full details can be found in the engine manual.
Where can I purchase a new blade for my petrol lawn mower?
When purchasing a new blade for your petrol mower, we recommend that you contact an authorised Mountfield dealer. To find your nearest retailer, go to the "find a distributor" section of the website's main menu.
Search engine powered by ElasticSuite
How big is your Garden?
Draw around your lawn on the map to find the most suitable products.
Zoom in on your property. Click or tap to draw a path around your garden to measure the area.