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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Cobra HM381 15″ Cylinder Mower
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.
In Stock
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.
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 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
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
Additional information
| Weight | 8.5 kg |
|---|---|
| Brand | Cobra |
| Blade Brake ClutchIndicates if the blade can be stopped while the engine keeps running. | FALSE |
| Collector SizeThe capacity of the grass collection bag or box in litres. | 25 |
| Cutting MethodThe cutting mechanism used (e.g., Rotary or Cylinder). | Cylinder |
| Cutting WidthThe width of the grass cut in a single pass. | 38 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). | Push |
| Electric StartIndicates if the machine features a key or push-button electric starter. | FALSE |
| Mowing FunctionsAvailable mowing modes (e.g., Collection, Mulching, Side-Discharge). | [“Collection”] |
| Rear RollerIndicates 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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- Orders will be sent out via either ThePalletNetwork or DHL insured service.
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