Hyundai HYM40LI420SP Review 40V Cordless Lawnmower

Hyundai HYM40LI420SP Review
Hyundai HYM40LI420SP
Performance/Cut Quality
88
Features
88
Durability
86
Value
90
Warranty/Support
86
What I Like
Self-propelled cordless mower
Mulching plug supplied
Lightweight steel deck
Vertical Storage
3 year warranty
What I Don't Like
No roller for creating a striped lawn
88
My Overall Rating

Summary

Hyundai HYM40LI420SP Cordless Mower Review

The Hyundai HYM40LI420SP is a lightweight, cordless lawn mower with a 42cm deck size and 6 cutting heights. It comes with a 2.5Ah 40v Samsung lithium-ion battery, providing up to 30 minutes of run-time, and a 45L grass collection box. This self-propelled mower is made from durable steel and includes a mulching plug and safety keys. It also comes with a 3-year warranty. With its cordless design and safety features, this mower is a great option for those who find lawn care physically challenging or want to make the job easier. It’s an ideal choice for medium-sized gardens and offers a handsomely-sized grass bag to reduce trips to the bin or compost heap.

Main Features

  • Self-propelled
  • 42cm cutting width
  • Lithium-ion Samsung battery – 40V
  • 45-litre grass collection bag
  • Safety key
  • Steel chassis for durability
  • 6 cutting heights
  • 3-year warranty

Battery Charger

Hyundai HYM40LI420SP PowerI have already touched on the use of the lithium-ion Samsung battery that makes this mower so powerful. You know you’re going to be getting quality but when you learn that this battery has been designed to withstand more than 1000 charges, it suddenly shoots up to another league.

You’re obviously going to want something reliable and that is exactly what you’re getting with this battery, but you’re also getting convenience. The 40V battery requires just 80 minutes to reach its fully charged capacity so you won’t be waiting around all day to get the grass cut.

The 2.5Ah battery, when fully charged will give you up to 30 minutes of cutting time, which is more than ample for tackling a small to medium lawn – just bear in mind that this applies to normal cutting conditions.

80 minutes for a full charge compares favourably with other brands, however if you need to charge even faster, then there is a Hyundai fast charge available that will get the job done in just 30 minutes. This fast charger will need to be purchased separately as the standard charger is supplied with the mower.

Remember, that the batteries and charger can also be used with other compatible 40 volt Hyundai tools.

Features In Detail

Deck And Blade

A super-strong steel deck gives you the confidence that this mower will not falter in terms of durability. It’s a commonly understood fact that steel has the ability to withstand a battering from the elements and still remain in excellent condition, so no matter what trials you decide to put the mower through, the strong body has got you covered.

The mower features powerful rotating blades that make light work of cutting the grass and thanks to the self-propelled nature of the machine, it will easily glide along getting every single blade of grass on the way.

Cutting Diameter

The Hyundai HYM40LI420SP has a reasonably generous cutting diameter of 42cm which is perfectly ample for small or medium-sized lawns. If you compare this to the larger model that features a 45cm cutting width, it’s easy to see that this is a better option if you don’t have a huge lawn.

Handles

One of the most notable things about the handle on this mower is its ability to fold down so that when the machine is not in use, it can be easily stored away in the shed or other outbuilding.

It also features a soft foam grip which is essential for comfortable operation and reducing vibrations, that further adds to the overall excellent experience you will have when using this mower.

Wheels

Hyundai HYM40LI420SP Height AdjustmentFour plastic wheels give you a good strong base for the mower whilst also enabling you to move about the lawn with ease. The back wheels are marginally larger which allows for better navigation over rougher terrain, or if the lawn has any small bumps or grooves. In turn, this will serve as a way of preventing any damage to the lawn mower whilst it is in action.

Front wheels: 152mm

Rear wheels: 178mm

Height Adjustment

The Hyundai HYM40LI420SP has six cutting heights which make it a very diverse machine. You’ll likely be aware that your lawn should be cut at different lengths throughout the year so having a good choice of cutting heights is essential to ensure your lawn remains at its healthiest all year round.

The cutting heights range between 25mm and 75mm giving you a very wide choice. But what’s even more impressive is how easy it is to switch between them. With the flick of a single lever, the cutting height can be adjusted and you can be on your way.

Roller

This model does not feature a roller for creating a striped lawn.


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Hyundai 16.5" / 42cm Cordless 40v Lithium-Ion Battery Self-Propelled...
  • No Cables, No Petrol, No Pollution - simply charge the batteries and you’re ready to go.
  • 420mm / 16.5" cutting width: Ideal for small to medium-sized lawns
  • Self-propelled: Drives itself - no pushing required
  • 6 adjustable cutting heights: Get the perfect finish on your lawn
  • 45L grass collector bag with mulching option: Minimises time spent emptying cuttings
  • Weighs just 19.9kg: Easy to move around the garden

Last update on 2024-04-18 / Affiliate links / Images from Amazon Product Advertising API

Mulching

Mulching is the process of the grass clippings being returned to the lawn in order to assist in its growth and health. The good news is that there is a mulching plug supplied as standard with this mulching lawn mower.

As the rotating blades spin around and cut the grass, the clippings are automatically distributed back across the lawn – it is a completely effortless process. Just pop in the mulching plug and you’re ready to go.

If you would like to learn more about the benefits of mulching, click on my article – The Benefits of Mulching Lawn Mowers.

Grass Collection Box

The Hyundai HYM40LI420SP comes with a very decent-sized grass catcher bag that is able to take up to 45 litres. It is a fabric bag that is very easy to remove and empty – not that you’ll need to be stopping to empty all that often thanks to the generous size.

Practicalities

Hyundai HYM40LI420SP SpecificationI have to say that one of the first things that caught my eye when testing out this mower was the fact that it is self-propelled. Not only does this cordless battery mower look like a petrol mower, it behaves like one. Remember it has a steel deck, and yes, it’s self-propelled!

Yes, I know there are other self-propelled cordless mowers from EGO and Mountfield available, but not at this price range. This Hyundai self-propelled mower is such great value for money when you consider what you are getting included. Included out of the box is a mulching plug, spare safety key, steel deck and a 3 year warranty and much more.

What’s more, the folding handles that I touched upon earlier makes for extremely easy storage with the added benefit of being able to store the mower vertically. The handles fold very easily both at the mid point and the lower deck point with no tools required. Hyundai are really listening to the UK market and including features that not only make the mowing experience easier, but also acknowledging that not everyone has masses of storage space available – nice one Hyundai!

The mower operates at a very low sound level so unlike some other mowers, there will be no risk to your hearing or of disturbing the neighbours, even if you want to mow early in the morning.

Other notable practicalities are the fact that it is so easy to get started. It’s not uncommon to find a lawn mower that requires a lot of putting together before the first use, but the Hyundai HYM40LI420SP can come straight out of the box and you’ll be getting to work in no time.

Hyundai Cordless Comparison Table

HYM40Li330P
Hyundai 13"/33cm 40V Lithium-Ion Cordless Battery Powered Roller Lawn...
HYM40Li380P
Hyundai 15"/38cm Cordless 40v Lithium-Ion Battery Roller Lawnmower...
HYM40Li420P
Hyundai 40V Lithium-Ion Battery Lawnmower, 42cm / 420mm Cutting Width,...
HYM40Li420SP
Hyundai 16.5" / 42cm Cordless 40v Lithium-Ion Battery Self-Propelled...
HYM80Li460P
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Lawnmower with...
HYM80Li460SP
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Self Propelled...
Mower
Hyundai 13"/33cm 40V Lithium-Ion Cordless Battery Powered Roller Lawn...
Hyundai 15"/38cm Cordless 40v Lithium-Ion Battery Roller Lawnmower...
Hyundai 40V Lithium-Ion Battery Lawnmower, 42cm / 420mm Cutting Width,...
Hyundai 16.5" / 42cm Cordless 40v Lithium-Ion Battery Self-Propelled...
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Lawnmower with...
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Self Propelled...
Battery
40V, 2.5Ah
40V, 2.5Ah
40V, 2.5Ah
40V, 2.5Ah
2X 40V, 2.5Ah
2X 40V, 2.5Ah
Battery Charging Time
80min Approx
80min Approx
80min Approx
80min Approx
80min per battery
80min per battery
Drive System
Push
Push
Push
Self Propelled
Push
Self Propelled
Cutting Heights
20-40-70mm (3 Positions)
20-70mm (5 Positions)
25-75mm (6 Positions)
25-75mm (6 Positions)
25-75mm (6 Positions)
25-75mm (6 Positions)
Cutting Width
33cm
38cm
42cm
42cm
45.2cm
45.2cm
Deck Material
Plastic
Plastic
Steel
Steel
Steel
Steel
Weight
13.9kg
13.9kg
19.9kg
19.9kg
27.8kg
29.8kg
Grass Bag Volume
30L
40L
45L
45L
65L
65L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
£209.99
Price not available
Price not available
Price not available
£459.99
£519.00
Prime Benefits
-
-
-
-
-
Amazon Prime
HYM40Li330P
Hyundai 13"/33cm 40V Lithium-Ion Cordless Battery Powered Roller Lawn...
Mower
Hyundai 13"/33cm 40V Lithium-Ion Cordless Battery Powered Roller Lawn...
Battery
40V, 2.5Ah
Battery Charging Time
80min Approx
Drive System
Push
Cutting Heights
20-40-70mm (3 Positions)
Cutting Width
33cm
Deck Material
Plastic
Weight
13.9kg
Grass Bag Volume
30L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
£209.99
Prime Benefits
-
More Information
Full Review
HYM40Li380P
Hyundai 15"/38cm Cordless 40v Lithium-Ion Battery Roller Lawnmower...
Mower
Hyundai 15"/38cm Cordless 40v Lithium-Ion Battery Roller Lawnmower...
Battery
40V, 2.5Ah
Battery Charging Time
80min Approx
Drive System
Push
Cutting Heights
20-70mm (5 Positions)
Cutting Width
38cm
Deck Material
Plastic
Weight
13.9kg
Grass Bag Volume
40L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
Price not available
Prime Benefits
-
More Information
Full Review
HYM40Li420P
Hyundai 40V Lithium-Ion Battery Lawnmower, 42cm / 420mm Cutting Width,...
Mower
Hyundai 40V Lithium-Ion Battery Lawnmower, 42cm / 420mm Cutting Width,...
Battery
40V, 2.5Ah
Battery Charging Time
80min Approx
Drive System
Push
Cutting Heights
25-75mm (6 Positions)
Cutting Width
42cm
Deck Material
Steel
Weight
19.9kg
Grass Bag Volume
45L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
Price not available
Prime Benefits
-
More Information
Full Review
HYM40Li420SP
Hyundai 16.5" / 42cm Cordless 40v Lithium-Ion Battery Self-Propelled...
Mower
Hyundai 16.5" / 42cm Cordless 40v Lithium-Ion Battery Self-Propelled...
Battery
40V, 2.5Ah
Battery Charging Time
80min Approx
Drive System
Self Propelled
Cutting Heights
25-75mm (6 Positions)
Cutting Width
42cm
Deck Material
Steel
Weight
19.9kg
Grass Bag Volume
45L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
Price not available
Prime Benefits
-
More Information
Full Review
HYM80Li460P
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Lawnmower with...
Mower
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Lawnmower with...
Battery
2X 40V, 2.5Ah
Battery Charging Time
80min per battery
Drive System
Push
Cutting Heights
25-75mm (6 Positions)
Cutting Width
45.2cm
Deck Material
Steel
Weight
27.8kg
Grass Bag Volume
65L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
£459.99
Prime Benefits
-
More Information
Full Review
HYM80Li460SP
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Self Propelled...
Mower
Hyundai 18"/45cm Cordless 80v Lithium-Ion Battery Self Propelled...
Battery
2X 40V, 2.5Ah
Battery Charging Time
80min per battery
Drive System
Self Propelled
Cutting Heights
25-75mm (6 Positions)
Cutting Width
45.2cm
Deck Material
Steel
Weight
29.8kg
Grass Bag Volume
65L
Rear Roller
Mulching Plug Included
Side Discharge
Vertical Storage
Price
£519.00
Prime Benefits
Amazon Prime
More Information
Full Review

Last update on 2024-04-19 / Affiliate links / Images from Amazon Product Advertising API

Safety Features

It’s essential to have a safe operation on any powered garden equipment to prevent injury or accidental start-up.

The Hyundai HYM40LI420SP comes with a safety key (and a spare), which must be inserted in order for the machine to be able to power up. When this is in, you can use the operator presence control (OPC) lever to get started as long as the safety button is also pressed with the other hand. If the safety key is removed, the mower is disabled.

What’s Included In The Box

  • 1 x Hyundai HYM40LI420SP
  • Mulching plug
  • 1 x 2.5Ah 40V lithium-ion battery
  • Safety key x 2
  • Battery charger
  • Instruction Manual

Pros and Cons

Pros
  • Self-propelled mower
  • Mulching plug supplied
  • Lightweight steel deck
  • Easy to store with vertical storage
  • 3 year warranty
  • Quick battery charging (30 min fast charger available separately)
  • Powerful & reliable Samsung battery
  • 42cm cutting width
  • Large grass bag (45 Litres)
  • Safety key x 2
Cons
  • No rear roller for creating a striped lawn

 

Should You Buy This Model

Hyundai HYM40LI420SP Conclusion

If you’re someone who has a small or medium lawn and needs a cordless mower that will breeze through your gardening tasks, then this is a very good option. If you are in need of something a little larger, the next model up, the Hyundai HYM80LI460SP might be a better choice – it has many of the same features but a larger cutting width.

This is also a good choice for people who need a mower that is versatile thanks to the variety of easily adjustable cutting heights.

What’s more, with a trusted name like Hyundai and the addition of the renowned Samsung battery, you know that quality is not going to be compromised.

The Hyundai HYM40LI420SP is also an excellent choice for those who may find pushing a manual drive lawn mower somewhat of a challenge. This is thanks to the self-propelled nature of the machine.

Incidentally, you can purchase this mower without the self propelled drive. The model number for the NON self-propelled version is HYM40LI420P and here is the link for more details.


Non Self-Propelled Model – Hyundai HYM40LI420P

Click the button below for more details on the Non Self-Propelled Model – Hyundai HYM40LI420P.

Click for Best Price

Conclusion

The Hyundai HYM40LI420SP is a great versatile cordless mower that has an impressive range of features making it ideal for a variety of users.

The quick-charging battery and the easy, out-of-the-box start-up makes getting outside and getting the job done more simple than ever.

With the mulching option, a good cutting width and various cutting heights, you’ll be able to create a lawn to be proud of and what’s more, the quiet operation and lack of any petrol make this a brilliantly eco-friendly option.

Click here to see the full list of my Best Self-Propelled Cordless Lawn Mowers with a complete guide including advantages and disadvantages.

Where Should I Purchase This Hyundai HYM40LI420SP ?


HyundaiSave5

5% Off Your Order At HYUNDAI POWER EQUIPMENT

Discount Code:

EASYLAWN5

 

Get Deal NOW!

 


Hyundai 16.5" / 42cm Cordless 40v Lithium-Ion Battery Self-Propelled...
  • No Cables, No Petrol, No Pollution - simply charge the batteries and you’re ready to go.
  • 420mm / 16.5" cutting width: Ideal for small to medium-sized lawns
  • Self-propelled: Drives itself - no pushing required
  • 6 adjustable cutting heights: Get the perfect finish on your lawn
  • 45L grass collector bag with mulching option: Minimises time spent emptying cuttings
  • Weighs just 19.9kg: Easy to move around the garden

Last update on 2024-04-18 / Affiliate links / Images from Amazon Product Advertising API

Push model of this mower (Not self-propelled)

Hyundai 40V Lithium-Ion Battery Lawnmower, 42cm / 420mm Cutting Width,...
263 Reviews
Hyundai 40V Lithium-Ion Battery Lawnmower, 42cm / 420mm Cutting Width,...
  • This fantastic lawnmower weighs only 19.9kg, is easy to use and is a ultra-quiet mower.
  • Comes with 6 adjustable cutting heights and 420mm / 16.5" cutting width
  • Our cordless lawnmower has a generous 45L grass collector bag and mulching option: Minimises time spent emptying cuttings.
  • Run Time: (No Load) - Up to 60mins* (Light/Dry Conditions) - Up to 40mins* (Heavy/Wet Conditions) - Up to 20mins*
  • For you peace of mind, the electric lawnmower comes with our Hyundai 3 year warranty.
  • Cutting time depends on many factors, such as how level the ground is, the thickness of the grass, the exact model of our 40v/80v machinery, cutting conditions and weather. Please use our run time estimates for guidance only as these can vary.

Last update on 2024-04-18 / Affiliate links / Images from Amazon Product Advertising API

Hyundai HYM40LI420SP FAQs

Does the Hyundai HYM40LI420SP have a rear roller?

No rear roller on this model.

Is there a fast charger available for this Hyundai HYM40LI420SP?

Yes, this is available as an optional extra and can be ordered on the link below - part number HYCH405. https://tidd.ly/32Ja5ZC

Can you adjust the speed of the self propulsion?

No, this is a single speed drive mower.

Is the deck plastic or metal on the Hyundai HYM40LI420SP?

The deck is made of powder coated steel.

How long is the warranty on this mower?

3 years including the battery.

How many safety keys are supplied with the Hyundai HYM40LI420SP?

2 keys.

Does the height lever adjust all 4 wheels simultaneously?

Yes, a single lever adjusts all 4 wheels.

Is the Hyundai HYM40LI420SP supplied with the mulching plug or is this an optional extra?

The mulching plug is supplied with the mower.


Not sure about this mower? Click here to see more Cordless Lawn Mower Reviews.


 

Lawnmower Product Expert, Reviewer and Author at EasyLawnMowing.co.uk | 01284 615144 | info@easylawnmowing.co.uk | Website | + posts

As a seasoned expert in the field of garden power tools, I have dedicated over a decade to working with and reviewing a wide variety of lawn mowers. My extensive experience has allowed me to gain a deep understanding of the benefits and limitations of different types of mowers and garden tools.

Over the years, I have honed my skills in writing informative articles and creating helpful videos for various blogs and publications. This has given me the ability to not only recognise what makes a good lawn mower, but also to help you choose the perfect garden tool for your specific needs and requirements.

With my wealth of knowledge and expertise, I am confident that I can provide you with valuable insights and recommendations when it comes to selecting the right lawn mower for your lawn. So, whether you're looking for a battery cordless, electric, petrol, or robotic mower, you can trust in my expertise to guide you towards the best option for your garden.

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