• Call us on 01256 672 673

Hyundai HYM400P Petrol Lawnmower 79cc 400mm Push Rotary

Regular price


Ask a question

FREE UK DELIVERY Order by 2:30pm for same day dispatch (excludes weekends and bank holidays). Delivery in 1-2 working days.

Hyundai Warranty Logo


400mm / 16" cutting width: Ideal for small to medium lawns

79cc Hyundai 4-stroke petrol engine: Provides easy starting and low fuel consumption

6 adjustable cutting heights: Get the perfect finish on your lawn

40L grass collector bag: Minimises time spent emptying cuttings

Lightweight at only 19kg: Easy to push around your garden

Foldable handles: Compact to transport and store in your shed or garage

Minimal set-up required: Also includes 600ml SA30 oil to get going out of the box

Peace of mind: 3 year Hyundai home-use warranty / 1 year commercial warranty (terms apply)


Budget-Friendly Petrol Lawn Mower

The HYM400P is a low-maintenance, compact petrol lawn mower from Hyundai. Fitted with a lightweight and very durable polypropylene deck, it is the most budget-friendly option of all of our petrol lawn mowers.

The Hyundai HYM400P lawn mower is powered by an impressive Hyundai 79cc OHV economical petrol 4-stroke engine, delivering impressive cutting power but also low levels of noise and fuel consumption to minimise disruption and keep running costs to a minimum. It also features a soft-pull recoil start for easy starting each time.

400mm Cutting Width

With a cutting width of 400mm / 16", this mower is ideal for small to medium lawns and gardens.

For the perfect, tailored cut on your lawn, the HYM400P can be easily adjusted between its 6 different cutting heights - from 25mm for super smooth to a 75mm option if you’re trimming rougher ground or doing a first cut - by using a single height adjusting lever, giving you complete control over your lawn care needs.

The HYM400P's spacious 40L polyester grass collector bag ensures that you'll spend less time having to empty the cuttings, reducing your overall mowing time.

Push Lawn Mower

Weighing just 19kg, this is one of the lightest petrol lawnmowers on the market, which is essential for hand push models to minimise fatigue and any strain on your arms and shoulders. It also means it can be lifted into the car boot with relative ease.

The soft grip handles can be folded forwards oven the main body for extra-compact storage to save space in your garden shed or garage.

Safe and Easy To Use

Designed with your safety in mind, the HYM400P includes OPC (Operator Presence Control) technology that ensures the engine will not run if you let go of the handle.

With minimal assembly required and 600ml engine oil included, you can be up and running in minutes to get that first cut on your lawn done as quickly as possible!

3 Year Warranty

As with all of our Hyundai Lawn Mower range, the HYM400P comes with our Hyundai 3 year home-use warranty* and 1 year commercial warranty* (terms apply) for added peace of mind.

At A Glance:

  • 400mm/16” cutting width for small to medium gardens
  • Hyundai 79cc OHV 4-stroke petrol engine
  • Push petrol lawn mower
  • 6 adjustable cutting heights – 25-75mm
  • 40L grass collector
  • Foldable handles for compact storage
  • OPC technology for extra safety
  • 3 year Hyundai home-use warranty / 1 year commercial warranty


Catcher type
Full Fabric
Catcher volume (l)
Cut options
Rear Discharge
Cutting height max (mm)
Cutting height min (mm)
Cutting positions
Cutting width (mm)
Deck material
Engine capacity (cc)
Under 100
Engine model
Hyundai IC80V
Engine oil
Engine oil capacity (ml)
Engine size (cc)
Engine type
4-Stroke OHV Single Valve
For lawns up to
Small Lawns - Under 2000sq. ft
Unleaded Petrol
Fuel capacity (l)
Fuel power source
Fully assembled dimensions
1340 x 510 x 1000 (H x W x L) (mm)
Gross weight (kg)
Handle type
Soft Grip
Model ean
Net weight (kg)
Packaged dimensions
670 x 510 x 375 (H x W x L) (mm)
Power (hp)
Product type
Lawn Mower
Quick clean hose connector
Rear roller
Safety features
Operator Presence Control
Start method
Warranty (years)
Wheel diameter (mm)
Front 150. Rear 150

Customer Reviews

Based on 9 reviews
Louise Barnett
Excellent lightweight petrol mower

I purchased this to substitute my corroding Briggs & Stratton powered mower. Delivery was swift, and it starts quickly and cuts effectively. The only minor drawbacks are its slightly weak power (only evident when cutting longer grass) and the grass catcher being quite minuscule, thus it fills up fast. I had an issue with hot starting, but customer services solved it quickly.

Brian Harrison
Sweet as a nut!

My son persuaded me to return the electric mower I had bought from elsewhere and opt for a petrol one instead to avoid the issue with cables. We were initially going to purchase a £200 model with a steel deck, however we found this one at the last minute which has a small engine and a polypropylene deck. It's been great so far, starting easily with a few pumps on the red button and collecting the grass without blocking. We've only used it three times, but it's been great. Highly recommend if you're after a lightweight petrol mower at a good price.

Angela Morrell
Excellent value for money and well made

I was drawn to the low price of this mower, however, after speedy delivery and assembly, I am delighted with the quality and how easily it starts. I had a query during assembly which the technical team helped me with over the phone, leaving me very satisfied with my purchase as a replacement for the Honda which had served me well over the years.

Nina Taylor
Brilliant lawnmower

I am confident that the great construction and reasonable cost will ensure its longevity.

Bess Sellars
Excellent product and value

This lawn mower was ideal for our lawn and looks splendid as well. Highly recommended!