This machine is eligible for "white glove" delivery to large parts of northern England, fulfilled by one of our 13 depots. See list of eligible postcodes. Please note we can only offer delivery Monday - Friday between 8am - 4pm. If you are not home during these hours we can leave your machine in a designated safe space.
Mountfield S421R PD Lawnmower
Your price
£359.00
RRP
Mountfield
|
S421R PD
In Stock
In Stock
Available to Order
Out of Stock
Every machine we supply is professionally assembled by one of our trained technicians before dispatch.
Every machine undergoes a thorough pre-delivery inspection which ensures your new machine is operating correctly, safely and is ready to use.
When we handover your new machine we will give you some instruction on the correct and safe use of your purchase. We will answer any questions you might have and also offer some instruction on basic maintenance to help you keep your new machine in good condition.
Product Details & Features
- 16"/41cm cutting width
- Petrol Mountfield engine
- Rear roller
- Self-propelled
- Up to 5-year warranty
The Mountfield S421R PD Lawnmower is a reliable and easy-to-use self-propelled petrol mower designed to deliver efficient, precise cutting and a traditional striped finish for small to medium-sized gardens. Combining robust build quality with practical features, this model is ideal for homeowners who want a neat, professional-looking lawn with minimal effort.
Powered by a dependable Mountfield ST 140 Autochoke 4-stroke engine, the S421R PD ensures smooth starting and consistent performance across a range of mowing conditions. Its self-propelled drive system reduces user fatigue, while the integrated rear roller creates attractive lawn stripes and enhances stability during use.
Key Features
Self-Propelled Drive – Provides effortless mowing and improved comfort, particularly on slopes or uneven terrain.
Mountfield ST 140 Engine – Reliable 139cc 4-stroke engine delivers steady and efficient cutting performance.
41 cm Cutting Width – Ideal for maintaining small to medium-sized lawns with ease.
Rear Roller – Produces a classic striped lawn finish while maintaining balance and control.
Central Height Adjustment – Quickly adjust cutting height to achieve the desired lawn finish.
60 L Grass Collector – Large-capacity collector minimises interruptions during mowing.
Durable Steel Deck – Strong and hard-wearing construction for long-term reliability.
Ideal For
Small to medium lawns (up to approx. 600 m²)
Users wanting a traditional striped lawn appearance
Gardeners seeking a simple, self-propelled mower
Homeowners looking for reliable and durable lawn care equipment
Product Details
Product Type: Petrol Rear-Roller Self-Propelled Lawnmower
Brand: Mountfield
Model: S421R PD
Engine: Mountfield ST 140 Autochoke (4-stroke)
Engine Capacity: 139 cc
Cutting Width: 41 cm (16")
Cutting Height Range: 20 – 70 mm
Grass Collector Capacity: 55 L
Drive Type: Self-propelled
Deck Material: Steel
Fuel Tank Capacity: 0.75 L
Application: Petrol lawn mower designed for efficient cutting and striped lawn maintenance in small to medium residential gardens.
Product Dimensions
Weight: 32 kg (70.55 lb)
Length: 150.0 cm (59.06 in)
Width: 49.0 cm (19.29 in)
Height: 112.0 cm (44.09 in)
Why Choose the Mountfield S421R PD Lawnmower
The Mountfield S421R PD is ideal for homeowners who want a clean, striped lawn without the complexity of larger machines. Its rear roller delivers a classic finish, while the self-propelled drive and reliable engine make mowing simple and efficient.
With its durable steel deck, generous grass collector, and user-friendly design, this mower offers excellent value, dependable performance, and consistent results—making it a great choice for maintaining a well-presented garden.
Product Specifications
| Manufacturer | Mountfield |
| Model | S421R PD |
| Category | Petrol |
| Type | Rotary |
| Propulsion | Self Propelled |
| Rear Roller | Yes |
| Auto Engine Stop | Yes |
| Key Start | No |
| Grass Collector | Yes - 55 litres |
| Cutting Width | 16"/41cm |
| Cutting Heights | 20-70mm |
| Cutter Deck | Steel |
| Engine | Stiga ST140 OHV |
| Lawn Size | Small |
| Weight | 32kg |
| Machine Warranty | 5 years in domestic use |
| Engine Warranty | 5 years in domestic use |
We’ll take care of you
Pre-Delivery Inspection
All machines undergo a professional assembly and rigorous testing before we dispatch.
Free White Glove Delivery
All machines qualify for free delivery to the local area around our branches. Spare parts are delivered nationally.
Click & Collect
Place your order online and collect for free from our branches across northern England.
Official Dealer
We're official dealers of all the machines we sell, meaning we're qualified to give you the best aftersales support.