We offer a free delivery service for all machines within a 30 mile radius. Not only that; we build, inspect and run up every machine prior to delivery. Making sure you get a fully functional machine that is set-up and ready for use. On delivery we will run through with you any instructions & maintenance advice so you are comfortable with your new machine.
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Mountfield HW531 PD 21″ Petrol Lawn Mower
Original price was: £539.00.£469.00Current price is: £469.00. inc. VAT
The Mountfield HW531 PD is a rugged, self-propelled petrol lawn mower designed to tackle large and uneven lawns up to 2000 m². Its powerful STIGA engine and wide 53cm cutting deck ensure efficient, high-quality performance.
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Description
Why buy the Mountfield HW531 PD 21″ Petrol Lawn Mower?
- Powered by a reliable and powerful 196cc STIGA ST 200 OHV petrol engine.
- Self-propelled rear-wheel drive system takes the effort out of mowing.
- Generous 53cm (21″) cutting width for efficient coverage of large lawns.
- Versatile 3-in-1 cutting: collect, mulch, or rear discharge clippings.
- Large 70-litre hybrid grass collector with ‘bag full’ indicator.
- Robust steel deck with large rear wheels, ideal for undulating ground.
Powerful Performance for Large Lawns
The Mountfield HW531 PD is a popular, high-specification self-propelled lawnmower, perfectly engineered for homeowners with large, undulating lawns. At its core is the powerful STIGA ST 200 OHV 196cc petrol engine, providing reliable power to both the cutting blade and the rear-wheel drive system. This self-propelled functionality means there’s no need to push; the mower moves forward at a steady 3.8 Km/h, making light work of slopes and rougher terrain.
Efficient and Versatile Cutting
Featuring an impressive 53cm cutting width, the HW531 PD covers more ground in less time, making it ideal for gardens up to 2000 m². The robust steel chassis, finished in classic Mountfield Red, houses a deep deck and a front comb, a combination that ensures a perfect cut every time. You have complete control over your lawn’s finish with a centralised cutting height adjustment lever, offering five positions from 25mm to 80mm.
This mower offers superb versatility with its 3-in-1 cutting system. You can collect clippings in the spacious 70-litre hybrid textile collector, which features an indicator to warn you when it’s full. Alternatively, engage the rear discharge option for less formal areas, or use the supplied mulching plug. Mulching finely chops the clippings and returns them to the lawn, acting as a natural, nutrient-rich fertiliser.
Designed for Durability and Convenience
Built for longevity and ease of use, the HW531 PD features large 280mm rear wheels on ball bearings, providing smooth travel over uneven ground. The ergonomic handlebar includes cam locks and a soft grip for operator comfort, and it can be adjusted or folded for easier storage. Maintenance is simplified with the handy Snap-On hose connector (washing link), allowing you to clean the underside of the deck efficiently after each use.
Buy From An Authorised Mountfield UK Dealer
Purchasing a Mountfield lawnmower from an authorised dealer like Sims Garden Machinery ensures you receive a genuine product with a full UK warranty. As a family-run business with over 100 years of experience, we offer more than just a box. Our trained sales staff are available to offer expert advice at our Stratford-upon-Avon showroom, ensuring you choose the right machine for your needs. For local customers, this lawnmower will receive a comprehensive Pre-Delivery Inspection (PDI) from our trained mechanics, be delivered fully assembled, and you’ll receive a full handover demonstration to get you started safely and confidently. This level of service guarantees your new mower is ready to perform at its best from the moment it arrives.
Not sure which machine or part is right for you?
Our team is here to help. Contact us today for expert advice.
Our team is here to help. Contact us today for expert advice.
Technical Specification
| Power | |
| Power Source | Petrol |
| Engine Brand | STIGA |
| Engine Model | ST 200 OHV Autochoke Powered by STIGA |
| Displacement | 196 cm³ |
| Power | 3.2 kW |
| Engine Rotation Speed | 2900 rpm |
| RPM Control | Fixed rpm |
| Starter | Recoil |
| Fuel Tank Capacity | 1 l |
| Engine Oil Tank Capacity | 0.5 l |
| Maximum Mowing Area | 2000 ㎡ |
| Cutting System | |
| Cutting Method | Collecting, Mulching, Rear discharge |
| Cutting Width | 53 cm |
| Deck Material | Steel |
| Cutting Height Adjustment | Centralized |
| Cutting Height Positions | 5 positions |
| Cutting Height Range | 25 – 80 mm |
| Drive System | |
| Driving | Self-propelled |
| Traction | Rear-wheel drive |
| Speed Forward | 3.8 Km/h |
| Equipment | |
| Collector Capacity | 70 l |
| Collector Type | Hybrid with warn |
| Handlebar Type | Ergonomic with cam locks + soft grip |
| Wheels | 200/280mm grooved wheels on ball bearings with soft tread |
| Front Handle | Yes |
| Adjustable Handlebar | Yes |
| Foldable Handlebar | Yes |
| Washing Link | Yes |
| Vibration and Noise Data | |
| Guaranteed Sound Power Level (LwA) | 98 dB(A) |
| Measured Sound Pressure Level at Operator’s Ear | 84 dB(A) |
| Vibration Level Hand (m/s²) | 7.5 |
| Overall Dimensions | |
| Weight | 36 kg |
| Pack Weight | 39.5 kg |
| Product Length | 1620 mm |
| Product Width | 730 mm |
| Product Height | 1260 mm |
Why buy from Sims Garden Machinery?
Authorised main dealer
We are authorised dealers for leading brands, meaning genuine parts, manufacturer-approved training, and warranty support you can rely on.
Real people, real support
No call centres. No ticket systems. Just a knowledgeable local team you can speak to when you need help.
Expert advice — not pushy sales
Our team are trained mechanics and product specialists, so you get honest, practical advice based on how you’ll actually use the machine.
Established, independent family business
We’re a long-standing independent dealer with deep roots in the local area — built on reputation, repeat customers, and word of mouth.
Frequently Asked Questions
Who is the Mountfield HW531 PD lawn mower best for?
The Mountfield HW531 PD is ideally suited for users with large gardens, up to approximately 2000 square metres. Its self-propelled drive system and large rear wheels make it particularly effective on uneven, sloping, or undulating ground where a push mower would be strenuous to use.
What cutting options does this mower offer?
This is a versatile 3-in-1 lawnmower. You can choose to (1) collect the grass clippings in the large 70-litre bag, (2) use the included mulching plug to finely chop and return the clippings to the lawn as a natural fertiliser, or (3) use the rear discharge flap for cutting longer grass in less formal areas.
How do I clean the cutting deck after use?
The HW531 PD features an integrated washing link. After mowing, you can connect a standard garden hose to this port. With the engine off and the blade disengaged, running the water while the mower is on a flat surface will efficiently clean the underside of the deck, preventing grass build-up and maintaining cutting performance.
What is a Pre-Delivery Inspection (PDI) and why is it important?
A Pre-Delivery Inspection is a service offered by authorised dealers like Sims Garden Machinery for local customers. Unlike buying a mower in a box from a large retailer, our trained mechanics assemble the machine, add the correct amounts of oil and fuel, and test it to ensure it’s running perfectly. This means you receive a machine that is safe, fully functional, and ready to use immediately, avoiding any assembly frustrations and ensuring the manufacturer’s warranty is validated.
User Manuals / Downloads
Additional information
| Brand | Mountfield |
|---|---|
| Engine SizeThe displacement of the engine in cubic centimetres (cc). | 196 |
| Collector SizeThe capacity of the grass collection bag or box in litres. | 70 |
| Cutting MethodThe cutting mechanism used (e.g., Rotary or Cylinder). | Rotary |
| Cutting WidthThe width of the grass cut in a single pass. | 53 cm |
| Deck MaterialThe material the cutter deck is constructed from (e.g., Steel, Aluminium). | Steel |
| Drive TypeHow the mower is propelled (e.g., Push, Self-Propelled, Variable Speed). | Self-Propelled |
| Mowing FunctionsAvailable mowing modes (e.g., Collection, Mulching, Side-Discharge). | [“Collection”,”Mulch”,”Rear-Discharge”] |
| Power Output (HP)The tool\'s power output measured in horsepower (hp). | 4.3 |
| Power Output (kW)The tool\'s power output measured in kilowatts (kW). | 3.2 |
| Power SourceThe primary energy source (e.g., Petrol 4-stroke, Battery, Electric). | Petrol |
| UNIVERSAL-Collection Type | Collect |
| WB-Mower Type? | Rotary |
| WB-Cutting Width | 21″ |
| WB-Propulsion Type | Self-Propelled |
| WB-Starting Method | Pull (Recoil) |
| WB-Wheel Type | Wheels |
Specification
Specification
| GENERAL INFO | |
| SKU | 294556843/M19 |
| CUTTING SYSTEM | |
| 4 in 1 cutting system | Yes |
| Cutting method | Collecting, Mulching, Side discharge, Rear discharge |
| Mulching function | Yes |
| Cutting width | 53 cm |
| Deck material | Steel |
| Cutting height adjustment | Centralized |
| Cutting height positions | 5 positions |
| Cutting height range | 25 – 80 mm |
| EQUIPMENT | |
| Collector capacity | 70 l |
| Handlebar type | Ergonomic with cam locks + soft grip |
| Wheels | 200/280mm grooved wheels on ball bearings with soft tread |
| Front handle | Yes (bumper) |
| Adjustable handlebar | Yes |
| Foldable handlebar | Yes |
| Washing link | Yes |
| Collector type | Hybrid with warn |
| OVERALL DIMENSIONS | |
| Pack weight | 39 kg |
| Product length | 1620 mm |
| Product width | 730 mm |
| Product height | 1260 mm |
| Weight | 36 kg |
| POWER | |
| Power source | Petrol |
| Power | 2.6 kW |
| Engine Brand | STIGA |
| Engine model | ST 170 OHV Autochoke Powered by STIGA |
| Displacement | 166 cm³ |
| Engine rotation speed | 2900 rpm |
| RPM control | Fixed rpm |
| Starter | Recoil |
| Fuel tank capacity | 1 l |
| Engine Oil tank capacity | 0.55 l |
| Maximum working area | 750 m² |
| DRIVE SYSTEM | |
| Traction | Rear-wheel drive |
| Driving | Self-propelled |
| Speed forward | 3.8 Km/h |
| VIBRATION AND NOISE DATA | |
| Guaranteed sound power level (LwA) – dB(A) | 98 |
| Measured sound pressure level at operator ear dB(A) | 84 |
| Vibration level hand (m/s2) | 7.5 |
| Measured sound power level dB(A) | 98 |
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About Mountfield
At Sims Garden Machinery we stock a wide range of Mountfield garden equipment. We offer a range of lawn tractors and rider mowers, suited for commercial lawn maintenance. We also have a range of regular lawn mowers, in both petrol and electric models. We stock cordless hedge trimmers and grass trimmers, along with more specialist gardening equipment like pole pruners. Finally, we have spare batteries for cordless lawnmowers, and battery charging stations.
We can deliver Mountfield garden equipment across the UK. Upon arrival a member of our team will assemble and demonstrate your equipment to you, ensuring safe and correct usage.
Our industry-trained sales team are available to help with any queries you have about our range of Mountfield gardening equipment. Speak to a member of our team today to discuss lawnmowers, hedge trimmers, or accessories. At Sims Garden Machinery we have been selling high-quality gardening equipment for over 100 years, remaining a family-run business.
Shipping & Delivery
FREE PDI, DELIVERY & HANDOVER
NATIONAL DELIVERY
- Each machine will be tested prior to delivery.
- Orders will be sent out via either ThePalletNetwork or DHL insured service.
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