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Cobra MX46SPE 18" Electric Lawnmower
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Cobra

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£65.99 Original price was: £65.99.£59.99Current price is: £59.99. inc. VAT

The award-winning Cobra HM381 is a lightweight, eco-friendly hand-propelled cylinder mower. Perfect for creating a classic striped finish on small to medium-sized lawns with its 5-bladed cutting system and rear roller.

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Description

Why buy the Cobra HM381 15″ Cylinder Mower?

  • Cutting Width: 38cm / 15″ for efficient mowing of smaller lawns.
  • Cutting System: 5-bladed hardened steel cylinder for a sharp, clean cut.
  • Rear Roller: Split rear roller for creating classic lawn stripes and easy turning.
  • Cutting Height: 4-stage adjustment from 13mm to 38mm.
  • Grass Collector: Includes a 25-litre fabric grass bag.
  • Eco-Friendly: Hand-propelled design is quiet and environmentally friendly.

The Cobra HM381 is a lightweight and environmentally friendly hand-propelled cylinder mower, celebrated with a Gardener’s World award. It is expertly designed to make light work of maintaining small to medium-sized lawns, delivering a precise, high-quality cut without the noise or emissions of a petrol engine.

Precision Cutting with a 5-Bladed Cylinder

At the core of the HM381 is a 5-bladed hardened steel cylinder cutting system. This design cuts the grass blades cleanly and sharply, much like scissors, which promotes healthier, greener lawn growth. The precision of a cylinder mower provides a superior finish compared to standard rotary mowers, making it the perfect choice for gardeners who take pride in their lawn’s appearance.

Adjustable Cutting Heights & Classic Stripes

The mower offers four easily adjustable cutting heights, ranging from a close 13mm up to 38mm. Adjusting the height is a simple, tool-free process achieved by moving the pins on either side of the blade. This versatility allows you to adapt to different grass conditions throughout the season. Furthermore, the integrated split rear roller not only helps in creating those sought-after classic lawn stripes but also provides stability and makes turning at the end of each pass smooth and effortless.

Convenient Grass Collection

The HM381 comes complete with a 25-litre fabric grass bag to collect clippings, keeping your lawn neat and tidy. An adjustable strap on the bag allows the mower to be used at a lower handle angle for improved comfort and more efficient collection. When it’s time to empty, the bag can be uncoupled from the handle shaft quickly and easily.

Your Authorised Cobra Dealer

When you purchase a Cobra lawnmower from Sims Garden Machinery, you are choosing an established, authorised UK dealer with over 100 years of experience. Our trained sales staff are on hand at our Stratford-upon-Avon showroom to help you find the perfect machine for your needs. For local customers, our service extends beyond the sale; we offer free pre-delivery inspection (PDI) to ensure your mower is perfectly set up, followed by local delivery and a full handover demonstration. This commitment is backed by our team of trained mechanics in our workshop, ensuring you receive comprehensive aftersales support for years to come.

Not sure which machine or part is right for you?
Our team is here to help. Contact us today for expert advice.

Technical Specification

Drive Hand Propelled
Cutting Width 38cm / 15″
Cutting Height 13 – 38mm / 4 Stage
Grass Bag Capacity 25L
Cutting System 5 Bladed Cylinder
Deck Steel
Rear Roller Yes / Split
Weight 8.5kg
Domestic Warranty 2 Years

Why buy from Sims Garden Machinery?

Authorised Dealer

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 people, real support

No call centres. No ticket systems. Just a knowledgeable local team you can speak to when you need help.

Expert Advice

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.

Since 1908

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

What size lawn is the Cobra HM381 suitable for?
The Cobra HM381, with its 15-inch cutting width and manual operation, is ideally suited for small to medium-sized domestic lawns. It is an excellent choice for gardeners who want a high-quality, striped finish on a manageable area.
How do I adjust the cutting height on this mower?
Adjusting the cutting height is straightforward and requires no tools. The mower features a simple pin system on either side of the blade cylinder. You simply remove the pins and reposition them into one of the four available height slots to set your desired cutting height, ranging from 13mm to 38mm.
Does this mower create stripes on the lawn?
Yes, the Cobra HM381 is specifically designed to create classic lawn stripes. It is equipped with a split rear roller which gently presses the grass down as you mow, creating the light and dark striped effect that is characteristic of a well-kept formal lawn.
Is the grass collector included with the HM381?
Yes, the mower comes complete with a 25-litre fabric grass bag. This collector is easy to attach and detach, making the collection and disposal of grass clippings clean and simple.

User Manuals / Downloads


View Cobra Brochure

Additional information
Weight 8.5 kg
Brand

Cobra

Blade Brake Clutch Indicates if the blade can be stopped while the engine keeps running.

FALSE

Collector Size The capacity of the grass collection bag or box in litres.

25

Cutting Method The cutting mechanism used (e.g., Rotary or Cylinder).

Cylinder

Cutting Width The width of the grass cut in a single pass.

38 cm

Deck Material The material the cutter deck is constructed from (e.g., Steel, Aluminium).

Steel

Drive Type How the mower is propelled (e.g., Push, Self-Propelled, Variable Speed).

Push

Electric Start Indicates if the machine features a key or push-button electric starter.

FALSE

Mowing Functions Available mowing modes (e.g., Collection, Mulching, Side-Discharge).

["Collection"]

Rear Roller Indicates if the mower features a rear roller for creating lawn stripes.

TRUE

Specification

Specification

Type Petrol
Propulsion Self Propelled
Cutting Width (cm) 43
Blade Type Rotary
Deck Steel
Power Type Petrol
Engine/Motor B&S 575IS InStart Engine 150cc
Starting Method Electric
Throttle Control 3 Speed
No of Heights of Cut 6
Lowest Height of Cut (mm) 17
Highest Height of Cut (mm) 75
Height of Cut Adjustment Single Lever
Grass Bag Capacity (ltr) 50
Weight (kg) 32
Handle Folding Yes
Max Domestic Warranty (yrs) 2
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Shipping & Delivery

FREE PDI, DELIVERY & HANDOVER

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.

NATIONAL DELIVERY

  • Each machine will be tested prior to delivery.
  • Orders will be sent out via either ThePalletNetwork or DHL insured service.
READ MORE
SKU: C3-COBRA HM381 Categories: Cylinder Lawn Mowers, Lawnmowers, Walk-behind Mowers
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    100+ Years Experience

    Family run since 1908

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    Thank you for visiting our site. Please contact us if you have any questions.

    20/21 The Waterways, Stratford-Upon-Avon, CV37 0AW
    Phone: 01789 205671
    Email: info@simsgardenmachinery.co.uk
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    £65.99 Original price was: £65.99.£59.99Current price is: £59.99. inc. VAT

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