Mountfield 145cc Honda Engine 51cm Self-Propelled Petrol Lawn Mower - Model SP51HMountfield 145cc Honda Engine 51cm Self-Propelled Petrol Lawn Mower - Model SP51H
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Mountfield 145cc Honda Engine 51cm Self-Propelled Petrol Lawn Mower - Model SP51H

Item #375968

Online Price£389.98
Shipping Included

- Powerful 145cc Honda OHV Autochoke engine

- Self-propelled (no need to push)

- 51cm cutting width

- 6 cutting heights (22-80mm)

- 60 litre grass collector with full indicator

- Mulching plug included 

- Suitable for lawns up to 2,500m² 

We will contact you within 4 business days for delivery within 7 business days from the date of your order (excluding weekends and bank holidays). Postcode restrictions may apply. Find out more in the Delivery & Returns Tab below

Your credit/debit card will be charged when your order is placed on this item.



The Mountfield SP51H is a tough, dependable and easy to use a stylish mower. Self-propelled with power to the rear wheels, there is no need to push, making this an ideal mower for maintaining your lawn with minimal effort, especially if it has slopes. Powered by an industry leading 145cc Honda OHV Autochoke engine, it has a 51cm cutting width and 6 cutting heights ranging from 22-80mm. It is also fitted with a cone clutch transmission (DSC) for smooth acceleration. The SP51H has a deep drawn pressed steel chassis giving superior strength and collecting ability. 

The large grass collector has a collecting capacity of 60 litres and a warning to let you know when it is full. To save time and to add a nitrogen rich mulch to your lawn, simply fit the mulching plug (supplied with the mower) and clippings are finely cut and redistributed back onto the lawn surface as you mow. The handle is easily folded down to make storage simple and space-effective. Suitable for medium and larger lawns up to 2,500m².


  • Self-propelled (no need to push)
  • Powerful 145cc Honda OHV Autochoke engine
  • 4-stroke petrol engine with a separate oil dipstick
  • Requires SAE30 engine oil (not supplied)
  • 51cm cutting width
  • Single lever cutting height adjustment
  • 6 cutting height positions (22-80 mm)
  • 60 litre grass collector with full indicator
  • 2-year Manufacturer’s warranty


  • H 110 x W 54 x D 157 cm
  • Weight: 32 kg

Supported by Service Link, an aftersales help and advice website, phone line (0800 121 6585) and a national service network of garden machinery repair specialists.   

TypeLawn Mower
DimensionsH 110 x W 54 x D 157 cm
Weight32 kg
Fuel TypePetrol
Cutting Width51 cm
Bag Capacity60 Litres
  •   Delivery is by a common carrier, with ground floor positioning. Our carrier will contact you via phone, text or email to arrange delivery.
  •   Additional day(s) transit may be required for remote areas.
  •   All orders must be delivered within 15 business days after contact from the delivery company. If the delivery company is unable to contact you after multiple attempts, your order may be returned to inventory and refunded to your original form of payment.
  •   Public and Regional holidays may affect delivery lead times.
  •   Delivery times may vary in the event of adverse weather conditions.
  •   Please note that we are only able to deliver to the UK mainland, excluding Post Office boxes and BFPO.
  •   Please also note we are not able to deliver this item to the following postcodes: IV4-IV11, IV14-IV28, IV40-IV49, IV51-IV56, IV63, ZE1-ZE3, KW1-KW3, KW5-KW17, KA27, KA28, PA20-PA80, PO30-PO41, IM, JE, GY, BT, HS, TR21-TR25.
  •   Further postcode delivery restrictions might apply to this item.
  •   Delivery is subject to reasonable access to the area without damaging customer’s property or the product, or jeopardising the safety of the delivery personnel The recipients must be home at the time of delivery. An adult of 18 years or older will need to be present during the delivery.
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  •  If you wish to return an item, please view Costco's Return Policy.
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