01234 741185 
Hello guest
Your basket is empty
Code: 299439043/M19

Mountfield S421R PD Self-Propelled Rear Roller Petrol Lawnmower

£459.00 inc. VAT

The perfect machine for the perfect stripe in your lawn. Take advantage of this fantastic member of the Mountfield family.

Contact us for availability


The Mountfield S421R PD Lawn Mower now has a new chassis and engine. The robust powder-coated steel chassis houses the new Mountfield ST140 Autochoke engine; this new engine is easy to start thanks to the auto choke system. The 139cc engine provides plenty of Torque and power even in the more demanding conditions.

Self propelled with forward drive coming from the powered rear roller, this mower is effortless to use and cuts right up to paths and border edges at the same time leaving those classic lawn stripes. The cutting height is centralised and easily adjusted with a single handle through 5 positions ranging from 20mm to 70mm, allowing you to choose the most suitable height for the finish required.

This model has been specifically designed to collect grass clippings and features a 55 litre grass collector with an indicator to show when it needs emptying. User comfort is ensured by an adjustable ergonomic handle that can be conveniently folded to maximise storage space when not in use

A 41cm cutting width makes this mower suitable for small to medium sized lawns.


  • Engine Brand Mountfield
  • Engine Type ST140 OHV
  • Engine Capacity 139cc
  • Net Power Output 2.20kW @ 2900rpm
  • Starting Method Recoil
  • Transmission Single Speed
  • Drive Self Propelled
  • Cutting Width 41cm /16"
  • Cutting Heights 20-70mm (5 Positions)
  • Cutting Height Adjustment Single Point
  • Roller Yes
  • Collecting 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
  • Included Accessories N/A
  • Wheels Front 180mm Rear Roller 127mm
  • Warranty 5-Years (T&C's apply)
  • Washing Link No
  • Weight 31kg

Customer reviews

This product has not yet been reviewed

Also in Lawnmowers for stripes (Rear Roller & Cylinder Lawnmowers)

Our site uses cookies. For more information, see our cookie policy. Accept cookies and close
Reject cookies Manage settings