With exceptional performance and style, the Cobra RM46SPBR petrol lawn mower is powered by a 140cc Briggs & Stratton 575EX Series engine for the best-in-class performance. With Ready Start recoil start, It incorporates the latest engine design technology ensuring optimal torque and efficiency, resulting in lower emissions.
The RM46SPBR features a self-propelled drive system for added comfort and ease of operator use on slopes and when tackling longer grass. It also features a rear roller for a traditional striped finish. The full width roller supports the lawn mower when the front wheels are in line with the border edge, allowing you to mow right up to the edge of flowerbeds and borders.
The robust steel deck has a 46cm (18") cutting width. The height of cut can be adjusted centrally through six positions from 17mm to 75mm.
The Cobra RM46SPBR is equipped with a 60 litre fabric grass bag, ideal for collecting large amounts of grass clippings before the need for emptying. This fabric enables a strong free flow of air which results in an even more compact and comprehensive grass collection on this lawn mower.
Expertly designed in the UK to cater specifically for the changing conditions of the British lawn, the Cobra RM46SPBR is suitable for gardens up to 600 square metres and is backed by a two year domestic warranty.
| Brand | Cobra |
|---|---|
| Engine | Briggs & Stratton |
| Engine Model | 575EX Series |
| Displacement | 140cc |
| Propulsion | Self-propelled single speed |
| Ground Speed | 3.4km/h |
| Throttle Control | No |
| Fuel Tank Capacity | 0.8L |
| Cutter Deck | Steel |
| Width of Cut | 46cm |
| Minimum Cutting Height | 17mm |
| Maximum Cutting Height | 75mm |
| Cutting Height Adjustment | Central, 6 stages |
| Grass Collector | Fabric grass bag with hard top |
| Collector Capacity | 60L |
| Fill Level Indicator | Yes |
| Mulch Plug | No |
| Side Deflector | No |
| Handle Type | Folding, cam lock |
| Wheels - Front | 7" |
| Rear Roller Type | Full width |
| Weight | 38.0kg |
| Includes | FREE lawn mower starter kit: 4-stroke oil, fuel fit + fuel can |
| Warranty | 2 years |
| Global Trade Item Number | 5055485038463 |
| Promotional Image | no_selection |
Briggs & Stratton 575EX Series engine, expertly powering Cobra lawn mowers
The 575EX engine provides the best-in-class performance in this category of engines. It incorporates the latest engine design technologies ensuring optimal torque and efficiency, resulting in lower emissions. |
![]() |
![]() |
Full width rear rollerThe rear roller series of petrol lawn mowers from Cobra all come equipped with a full width rear roller to help produce a traditional striped finish. The machine also gives you the ability to mow right up to the edge of flowerbeds and borders. The rear roller supports the lawn mower when the front wheels are in line with the border edge. |
A closer cutCobra rear roller lawn mowers cut down to 17mm. |
![]() |
![]() |
Single lever 6 stage height of cut adjustmentWith a fully adjustable six cutting heights ranging from 17mm for a superb low finish, up to 75mm for tackling longer grass. All this is achieved by simply using the single lever height of cut adjustment level which has been conveniently positioned next to the rear roller. |
Large capacity grass bag will full indicatorA capacious 60 litre fabric grass bag allows collection of large amounts of grass clippings before the need to empty. The grass bag is made from a robust, high quality fabric. This fabric enables a strong free flow of air which means that grass collection on this machine is even more compact and comprehensive. |
![]() |
![]() |
Quick release handle leversEasily fold the handle bar over for easier transportation and more compact storage. |
ABOUT COBRA GARDEN.....

Cobra Garden - The Most Comprehensive Range of Garden Machinery in the UK
Cobra garden machinery was launched in the United Kingdom in 2013 and is supported by Henton & Chattell Ltd, giving Cobra the benefit of over 90 years experience in the garden machinery and horticultural Industry.
The Cobra Garden range is constantly expanding and now consists of over 130 products to cover both your domestic and professional requirements. Cobra incorporates a comprehensive range of petrol, electric and cordless lawn mowers, hand-held machines and lawn care products. Cobra Garden products are available across the UK throughout a network of approved specialist dealers. As a Cobra Garden approved dealer, The Green Reaper has the knowledge and experience to help you purchase the correct Cobra Garden product for your requirements. We will also provide expert after-sales assistance if needed.
Cobra Garden’s philosophy is to remain true to its trusted values of innovation, quality, reliability, value and customer service. Cobra Garden works hard to ensure that the products and services on offer continue to be relevant to its customers.

![]() |
This product arrives in a box |
![]() |
Small hand tools are required for assembly |
![]() |
Oil is required in the engine before starting |
You may also be interested in
-
Cobra RM46SPCE Self-Propelled Rear Roller Petrol Lawn Mower (Electric Start)Special Price £479.99 (inc VAT) Regular Price £520.99 (inc VAT) -
Cobra RM46SPH Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £454.99 (inc VAT) Regular Price £497.99 (inc VAT) -
Masport Rotarola RRSP 18 In-Start Self-Propelled Rear Roller Petrol Lawn Mower [Electric Start]Special Price £919.00 (inc VAT) Regular Price £1,019.00 (inc VAT) -
Masport Rotarola RRSP 18 H Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £855.00 (inc VAT) Regular Price £949.00 (inc VAT) -
Masport Rotarola RRSP 18 Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £799.00 (inc VAT) Regular Price £889.00 (inc VAT)




















![Masport Rotarola RRSP 18 In-Start Self-Propelled Rear Roller Petrol Lawn Mower [Electric Start]](https://www.thegreenreaper.co.uk/media/catalog/product/cache/d31472502bc471ebf29eb021c36631e6/m/a/masport-rrsp18-in-start-lawnmower.jpg)

