Shop by Brand
Shop by Price

We accept payment via Paypal and major credit cards

MOUNTFIELD S421HP Petrol Lawn Mower

MOUNTFIELD S421HP Petrol Lawn Mower
MOUNTFIELD S421HP Petrol Lawn MowerMOUNTFIELD S421HP Petrol Lawn MowerMOUNTFIELD S421HP Petrol Lawn Mower
MOUNTFIELD S421HP Petrol Lawn MowerMOUNTFIELD S421HP Petrol Lawn MowerMOUNTFIELD S421HP Petrol Lawn Mower
Our Price:  £239.00
List Price:  £279.00
Saving Of:  14%
(Inc. 20% VAT)


In stock

Great performance and superb value for money.

The Mountfield S421HP petrol lawn mower has an incredible range of features for its price.

Premium specification

Firstly, It has a 16 inch cutting width that makes it ideal for small to medium gardens (lawns up to 20m x 20m), and a robust steel cutting deck which is powder coated to allow you years of use from the machine. 

Hand propelled for simple control

Powered by a Mountfield petrol engine, you can expect easy starting to allow you to use your time more efficiently.  Being hand propelled, you can choose the speed of the machine to suit you.

Versatile 3 in 1 cutting system

The S421HP has an effective 3 in 1 cutting system that allows you to collect, mulch or use rear discharge when cutting the grass. Collecting has the machine cut and collect the grass into the easy to detach 60 litre collecting box with hard top. Mulching works simply by taking the collector box off and fitting the mulching plug to allow the grass clippings to be deposited back into the the ground under the deck, ensuring the nutrients from the clippings are put back into the soil. The rear discharge option has the machine simply cut and discharge the clippings from the rear of the lawn mower.

With all these options and features, the S421HP is a great machine for domestic use.


This machine comes with a conditional 5 year warranty.

  • Engine Brand: Mountfield
  • Engine Type: RS100 OHV
  • Engine Capacity: 100cc
  • Net Power Output: 1.55kW @ 2800rpm
  • Starting Method: Recoil
  • Drive: Hand Propelled
  • Cutting Cutting Width: 41cm /16"
  • Cutting Heights: 25-80mm (5 Positions)
  • Cutting Height Adjustment: 4 Levers
  • Roller: No
  • Collecting: Yes
  • Mulching: Yes
  • Collector Canvas, Hard Top 60 litres
  • Chassis: Steel
  • Fuel Tank Capacity: 0.8 litre
  • Lawn Size: 20m x 20m
  • Collapsible Handles: Hand Wheel
  • Weight: 23kg

Power Source:  Petrol

Part Number:  S421HP
SKU: M5-S421HP

Be the first to Write a Review for this item!

Related Products
MOUNTFIELD S421RHP Petrol Lawn Mower

MOUNTFIELD S421RHP Petrol Lawn Mower£349.00   £319.00

A 41cm / 16 inch cut hand propelled petrol lawn mower from Mountfield, complete with 55 litre grass bag and rear roller for the perfect striped finish.

MOUNTFIELD HP425 Petrol Lawn Mower

MOUNTFIELD HP425 Petrol Lawn Mower£399.00   £359.00

The HP425 from Mountfield comes with a reliable 145 cc GCV145 autochoke Honda engine, featuring impressive power and reliability you can trust. It has a 16 inch cutting width and a 60 litre collector.

MOUNTFIELD S421RPD Petrol Lawn Mower

MOUNTFIELD S421RPD Petrol Lawn Mower£389.00   £359.00

Mountfield's S421RPD is a great value 16 inch / 41 cm rear roller self propelled lawn mower with a 55 litre fabric grass collector.

MOUNTFIELD HW531PD Petrol Lawn Mower

MOUNTFIELD HW531PD Petrol Lawn Mower£499.00   £419.00

A powerful Mountfield mower with large 53 cm cutting width and oversized rear wheels

Ron Smith Garden & Estate Machinery