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Mountfield SP51 Self-Propelled 3IN1 Petrol Lawnmower

  • Brand: Mountfield

  • MO2L0536043/MC

  • Availability: In Stock

  • Recommended Retail Price: £429.00

  • Our Price £319.00

  • You save: £110.00

This 4 wheeled Mountfield SP51 lawnmower has many great features including a large 60l fabric grass bag, powder coated steel chassis and ergonomic folding handles. Fabric grass collectors allow the air to circulate through the cuttings as you mow and are collapsible for better storage.

The SP 51 offers 3 mowing functions for the user, cut and collect, rear discharge or mulching so you can adapt your mowing to match the conditions.

The Mountfield SP51 is a power drive or self-propelled lawnmower with a single speed. The lightweight design and 51cm cutting width are ideal for medium sized lawns.  

Choose your ideal cutting height from the 5 options which can be adjusted from 27 – 90mm. Start at the highest setting (90mm) then work down to the lowest (27mm) for the best cut and finish to your lawn. Quick and simple height adjustment is done by a single lever.

A bottle of 4-stroke engine oil will be included with the mower to get you started. You then only need to fill with fresh petrol and off you go. 


  1. Collect, rear discharge, mulch
  2. Single speed drive
  3. Collapsible fabric grass collector
  4. Single point height adjustment


  • Model: SP51
  • Type: 4 Wheel
  • Blade Type: Rotary
  • Drive: Yes, single speed
  • Cutting Width: 51cm (20")
  • Cutting Deck Material: Powder coated steel
  • Cutting Height Adjustment: Single Lever
  • Cutting Height Settings: 5 from 27 - 90mm
  • Engine: Mountfield ST140 145cc
  • Fuel: Unleaded petrol
  • Engine Oil: 4-stroke
  • Starter: Recoil / Manual pull
  • Handles: Ergo, folding
  • Wheels F/R : 200mm / 280mm with ball bearings
  • Grass Collector: 60l fabric with hard top
  • Rear Discharge: Yes
  • Mulch: Yes, mulch plug included
  • Warranty: 2 year homeowner (Terms and Conditions Apply)
  • Weight: 35kg

Always use fresh petrol in your engine as it can begin to go stale within 4 – 6 weeks. Stale fuel will affect the performance and running quality of the engine and can stop it working altogether. Only buy as much as you need and don’t store big quantities. Alternatively mix your fresh petrol with a fuel additive which can keep it fresh for up to 3 years. These additives won’t revive stale fuel so you need to mix together with the fresh petrol before you add to the fuel tank.

Cutting Width
20" / 51cm
Deck Material
Domestic Warranty
2 Year
Engine Manufacturer
Mowing Functions
Recoil / Manual

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