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MOUNTFIELD S421RHP Petrol Lawn Mower

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MOUNTFIELD S421RHP Petrol Lawn Mower
Our Price:  £311.00
List Price:  £349.00
Saving Of:  11%
(Inc. 20% VAT)(£259.17 Exc. VAT)


In stock


  (1 Review)

SPECIAL OFFER:  A free Oil SAE30 for 4 stroke machinery 1 litre is available when you order 1 item or more of selected products.

Achieve a superb striped finish on your lawn.

Ideal for lawn sizes up to 20m x 20m, the S421R HP hand-propelled rear roller lawn mower has a fantastic Mountfield ST120 Autochoke engine that produces 1.9kW of power @ 2900rpm.

The 41 cm/ 16 inch wide cutting blade allows for the clipping to be collected in the convenient 55-litre canvas hard top collection bag. This lawn mower also features a range of cutting heights between 20-70mm ( 5 positions) to get your desired for you garden.  

Includes a useful indicator that lets you known when the bag needs emptying. A good tip is that when mixed with equal amounts of woody material it helps to give the best garden compost. 

Overall, this machine is extremely sturdy and efficient, delivering a high-powered performance to help get that manicured striped look quickly. 


  • Engine: Mountfield
  • Engine type: ST 120 OHV
  • Engine capacity: 123 cc
  • Net power output: 1.90kW @ 2900 rpm
  • Starting method: recoil
  • Transmission: single speed
  • Drive: hand propelled
  • Cutting width: 41 cm/ 16 inch
  • Cutting heights: 20-70mm (5 positions)
  • Cutting height adjustment: single point
  • Roller: yes
  • Collector: yes
  • Mulching: no
  • Collector: canvas with hard top 55 litres
  • Chassis steel
  • Fuel tank capacity: 0.85 litres
  • Lawn size: 20m x 20m
  • Collapsible handles: hand wheel
  • Safety features: operator presence control
  • Wheels: front 180 mm rear roller 127 mm
  • Warranty: 5 years (Terms and Conditions apply)
  • Washing link: no
  • dB(A) rating: 96
  • Weight: 30 kg

Important Information:  PLEASE NOTE: Lawn Mowers are delivered drained of their fuel and oil. Please ensure you fill them with the appropriate amount of fuel and oil before first use to avoid damaging your machine. Always refer to the operating manual.
Power Source:  Petrol
Cutting Width:  41 cm

Part Number:  S421RHP

Why choose us?

Garden Machinery Direct is a family run business with over 50 years experience in selling and servicing garden equipment. We are one of the biggest garden machinery retailers in the UK. Based in the Midlands, we are well placed to deliver products across the UK. We are main agents for all the biggest garden machinery brands, and have fantastic working relationships with world leading manufacturers.

Our goal is to offer customers top of the range garden machinery at discount prices, delivered direct to your door. Our friendly and professional staff are available by telephone or email to give expert advice on the equipment most suited to your needs or to answer any queries you may have. We also operate an efficient spare parts service, utilising the latest computer link-ups direct to manufacturers stocks.

All of the garden machinery we sell carries a manufacturers guarantee, supported by a nationwide network of authorised service dealers.

At Garden Machinery Direct we offer our customers the best deals and even better service.

Please feel free to contact us if you have any questions.

Average Rating (1 Review):  
Write a Review and share your opinions!

MOUNTFIELD S421RHP Petrol Lawn Mower
Monday, 24 August 2020  | 

Lovely product and easy to use, just a shame it’s not self-propelled and doesn’t have an idle speed when moving corners when you release the throttle bar.


This review has not been appraised.

  • All machinery is tested by the manufacturer's trained technicians
  • When carrying out servicing and repairs, only genuine Mountfield parts & spares are used to ensure quality

View the Mountfield brochure for more information.

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