The Cobra RM46SPH petrol lawn mower is expertly powered by a 145cc Honda GCVx145 OHC engine. The easy starting engine packs a punch and offers a quiet yet powerful and lightweight combination for a variety of demanding mowing applications.
The RM46SPH is self-propelled with recoil start and is equipped with 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 RM46SPH is equipped with a 55 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 RM46SPH is suitable for medium to large gardens and is backed by a two year domestic warranty.
| Brand | Cobra |
|---|---|
| Engine | Honda |
| Engine Model | GCVX145 |
| Engine Type | Petrol, 4-stroke, OHC |
| Displacement | 145cc |
| Net Rated Power Output | Net power: 3.1kW (4.2hp) / 3600rpm Cont. rated power: 2.1kW (2.8hp) / 3000rpm Max. net torque: 9.1Nm (0.93kgfm ) / 2500rpm |
| Propulsion | Self-propelled single speed |
| Throttle Control | No |
| Fuel Tank Capacity | 0.91L |
| Oil Tank Capacity | 0.4L |
| 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 | 55L |
| Fill Level Indicator | Yes |
| Wheels - Front | 7" |
| Rear Roller Type | Full width |
| Weight | 32.0kg |
| Includes | FREE lawn mower starter kit: 4-stroke oil, fuel fit + fuel can |
| Warranty | 2 years |
| Global Trade Item Number | 5055485038418 |
| Promotional Image | no_selection |
Honda 145cc GCVX145 engineThe Honda GCVX145 'Easy Start' petrol engine offers a quiet, yet powerful and lightweight combination for a variety of demanding applications. The Honda GCVX145 engine powers Cobra lawn mowers for medium to large gardens.
|
![]() |
![]() |
46cm / 18" cutting deckThe Cobra RM46SPH lawn mower features a robust 46cm cutting deck, making it an excellent choice for medium to larger sized lawns. This cutting deck size allows for efficient and precise mowing, ensuring a clean, even cut with each pass. The 18" width strikes a perfect balance between manoeuvrability and coverage. |
Self-propelled driveThe Cobra RM46SPH petrol lawn mower comes equipped with a self-propelled drive system for added comfort and ease of operator use. The self propelled system takes all the effort out of pushing your lawn mower, meaning you can maintain your lawn with ease. |
![]() |
![]() |
17-75mm cut heightsWith a fully adjustable six cut heights ranging from 17mm up to 75mm for tackling longer grass, choose the Cobra RM46SPH. All this is achieved by simply using the single height of cut lever. |
Beautiful striped finishEquipped with a full width rear roller to help produce a traditional striped finish. The RM46SPH also gives you the ability to mow right up to the edge of flowerbeds and borders. |
![]() |
![]() |
Spacious grass bagEquipped with a 55 litre fabric grass bag, ideal for collecting large amounts of grass clippings before the need for emptying. 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. |
Know when it's time to emptyTo make life even easier, Cobra have equipped the mower with a grass bag full indicator system. |
|
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
-
Lawnflite Pro 448HR Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £1,149.00 (inc VAT) Regular Price £1,399.00 (inc VAT) -
Cobra Pro RM53SPH Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £1,220.00 (inc VAT) Regular Price £1,279.00 (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) -
Cobra Pro RM48SPH Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £1,175.00 (inc VAT) Regular Price £1,229.00 (inc VAT) -
Masport Rotarola RRSP 22 H Self-Propelled Rear Roller Petrol Lawn MowerSpecial Price £1,009.00 (inc VAT) Regular Price £1,119.00 (inc VAT)






















