Description
The Mountfield SP46 Self-Propelled Petrol Lawn Mower is a dependable and easy-to-use mower that makes maintaining medium-sized gardens simple and efficient. Combining a robust steel chassis with a powerful STIGA petrol engine and self-propelled drive, the SP46 is built for homeowners who want reliable performance, excellent cutting results and minimal effort when mowing their lawn. Suitable for gardens up to approximately 500m², it delivers the ideal balance of power, durability and manoeuvrability.
At the heart of the SP46 is the reliable 139cc STIGA ST 140 OHV Autochoke petrol engine, producing 2.2kW of power. The Autochoke system simplifies starting by automatically managing the choke, allowing the engine to start quickly with minimal effort. The overhead valve design provides efficient fuel consumption, dependable performance and reduced emissions, making it ideal for regular lawn maintenance throughout the growing season.
The generous 46cm steel cutting deck allows you to cover larger areas more quickly while maintaining an even, professional finish. Constructed from durable pressed steel, the deck is designed to withstand years of regular use. Centralised height adjustment makes it easy to choose between six cutting heights ranging from 22mm to 65mm using a single lever, allowing you to adapt the mower to changing grass conditions throughout the year.
The self-propelled rear-wheel drive system removes much of the effort from mowing, making it easier to work across larger lawns and gentle slopes. Travelling at a comfortable forward speed of 3.7km/h, the mower allows you to maintain a steady pace while reducing fatigue during longer mowing sessions. Combined with its lightweight design and balanced handling, the SP46 is comfortable to operate even for extended periods.
The large 60-litre hybrid grass collector combines a durable plastic top with a breathable textile bag to maximise airflow and improve grass collection. An integrated collector full indicator lets you know when the bag needs emptying, helping to prevent blockages and maintain optimum collection performance. The generous capacity reduces the number of stops required, allowing you to complete larger lawns more efficiently.
The SP46 offers versatile mowing options to suit different lawn conditions. Grass can be collected for a neat finish, discharged from the rear when cutting longer grass or finely mulched using the included mulching plug. Mulching returns finely chopped grass clippings back into the lawn where they decompose naturally, helping to improve soil health, retain moisture and reduce the need for fertiliser while eliminating the time spent emptying the collector.
Operator comfort has been carefully considered throughout the design. The ergonomic soft-grip handlebar helps reduce vibration, while the foldable handles allow the mower to be stored compactly when not in use. The robust grooved wheels provide excellent grip and smooth manoeuvrability across a variety of lawn surfaces, making the mower easy to control around trees, borders and garden features.
Designed with durability in mind, the SP46 features a robust steel deck, dependable components and straightforward maintenance. The simple recoil starting system, reliable petrol engine and quality construction ensure years of dependable service with routine maintenance. Weighing approximately 26kg, it remains easy to manoeuvre while providing the stability needed for consistent cutting performance.
The Mountfield SP46 Self-Propelled Petrol Lawn Mower is an excellent choice for homeowners looking for a powerful, reliable and versatile petrol lawn mower. Featuring a 139cc STIGA engine, self-propelled drive, durable 46cm steel cutting deck, 60-litre grass collector and mulching capability, the Mountfield SP46 delivers outstanding performance and effortless mowing for medium-sized gardens.









