Mountfield S421R PD Petrol Roller Mower (Self Propelled)

The Mountfield S421R PD is a great entry level Roller mower. It’s Self Propelled (Single Speed) Rear Roller can provide a beautiful stripe on any lawn.


Original price was: £520.00.Current price is: £469.00. inc. VAT

Usually dispatched within 3-7 days

Central Distribution Stock

This means we have no stock "on-site" but there is stock in the UK. These order are typically dispatched within 3-7 days however this can vary during peak season. Usually delivered within 7-10 working days.

UK Mainland Delivery: *FREE Over £200 Inc VAT (Excluding Ride On's)
Additional charges apply for certain postcodes (i.e. Scottish Highlands etc.). Prices calculated at checkout based on weight / size / address.

European & Overseas Delivery:
Our integrated IOSS system applies the correct Tax for your Country (for orders under €150) for faster customs clearance. All orders over this value may incur additional charges at customs.

Click & Collect:
Our warehouse staff they will notify you when your order is ready to collect from our depot (NE10). New Machinery purchases will be built-up, fuelled & oiled (as required) & tuned by our workshop; Ready to Mow!

Local Delivery: *FREE Over £250 Inc VAT (New Machinery Only)
For customers within 25 miles from our depot (NE10), we will delivery your new machine once it's built-up, fuelled & oiled (as required) & tuned by our workshop; Ready to Mow! Average 2-3 day lead time.

Low Stock - Hurry While Stock Lasts


The Mountfield S421R PD Petrol Roller Mower is Self Propelled (Single Speed) with a 41cm / 16″ Cutting Width. It’s powered by the ultra-reliable Stiga ST140 (139cc) engine which features “Auto-Choke” making it very simple & easy to start.

The main feature of the S421R PD is it’s Rear Roller that not only creates a classic striped finish, but will cut right over the edge of flower borders. The Rear Roller is also Self Propelled with a single speed drive. Just lift the lever on the handle bars to engage the drive and simply steer the mower!

There’s also 5 different cutting heights to choose from ranging from 20mm to 70mm. This can be changed using 1 simple lever. You’ll be wondering how you achieved such a beautiful lawn with so much ease! Grass clippings are collected in the large 55-litre canvas grass bag which has a handy indicator to let you know when it’s full.

In addition, this stripe-making mower only weighs 32kg and features quick folding handles making it quick and easy to store.

Backed by a 5 Year Warranty (subject to annual servicing), the Mountfield S421R PD is a superb mower for any small to medium-sized lawns which have slopes, up to 20m x 20m in size.

Mountfield Lawn Mowers


Engine BrandMountfield
Engine TypeST140 OHV
Engine Capacity139cc
Net Power Output2.2kW @ 2900rpm
Starting MethodRecoil / Pull Start
DriveSelf Propelled
TransmissionSingle Speed (4.1km/h)
Cutting Width41cm /16″
Cutting Heights20-70mm (5 Positions)
Cutting Height AdjusterSingle Lever
CollectorCanvas / Hard Top 55 litres
Fuel Tank Capacity0.75 Litre
Lawn Size20m x 20m
Collapsible HandlesHand Wheel + Quick Release
Safety FeaturesOperator Presence Control
Included AccessoriesN/A
Warranty5 Years (Terms & Conditions Apply)
Washing LinkNo
dB(A) Rating95


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