We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Coronavirus Read our latest advice
Reviews based on facts
Our rigorous tests find the facts, and our impartial reviews tell you the truth about how products perform. First month £5, then £9.99 per month, cancel anytime.
Try Which?
6 October 2020

Should I buy a petrol grass trimmer?

Petrol grass trimmers are great for cutting long grass and tough weeds, but have some disadvantages. Find out if they are right for your garden.
Petrol grass trimmer
Jade Harding

A petrol grass trimmer is designed for cutting down large areas of long grass and weeds, and is one option for working away from the house. 

Unlike cordless electric models, which need recharging regularly, all you need is a can of petrol and you can work for hours at a time. Petrol trimmers are ideal for gardeners who need to clear an allotment or cut down a wildflower meadow. 

However, don't expect them to be suited to all trimming tasks. They are much too powerful and hard to control to edge the lawn, for example. 

Head straight to our petrol grass trimmer reviews.

Are petrol grass trimmers any good?


  • You can work wherever you want.
  • Powerful enough to clear tough weeds or cut down a large meadow.


  • Too powerful to use for light gardening jobs. 
  • Can be hard to start.
  • Petrol mowers are generally a lot heavier than other types.

Are they easy to use?

Petrol machinery has a reputation for being hard to start and tricky to maintain, and this is sometimes justified. However, some petrol grass trimmers have easy-start engines that simplify the start-up routine and don't need as much force to work the pull cord. 

Most petrol trimmers also have an anti-vibration mechanism, although these tend to reduce vibration rather than eliminate it, and petrol engines are by their very nature noisy and give off exhaust fumes. 

They are also usually heavier than most cordless electric grass trimmers - unless the cordless model has a large and heavy battery. 

However, some models do come with a harness or shoulder strap, which will help to reduce the strain on your arms. 

How much do petrol grass trimmers cost?

Petrol trimmers typically cost from £100 for a basic model up to around £700 for a high-end professional model. 

We've tested petrol grass trimmers from six major brands including Honda, Ryobi and Stihl. Find out about these and other manufacturers with our grass trimmer brand guide.


Only logged-in Which? members can unlock our recommendations below. Not yet a member? Join Which? today to get instant access.

Best petrol grass trimmers

Sign up to reveal product image
Best Buy

This is a great petrol grass trimmer, and the brushcutter head is extremely effective. It's comfortable to use and easily deals with tough job, such as heavy weeds and long grass. The bump feed on the grass trimmer head works well, so you won't lose your line. It's pricey, but should last you a long time.

Sign up to reveal product
First month only £5, then £9.99 per month, cancel any time
Already a member? Log in
Sign up to reveal product image

It may have a smaller engine than other petrol grass trimmers, but this model still packs a punch. It's from a manufacturer with a solid reputation for producing excellent garden tools.

Sign up to reveal product
First month only £5, then £9.99 per month, cancel any time
Already a member? Log in
Sign up to reveal product image

This petrol grass trimmer charged through our tests for cutting long grass and weeds. But as you might expect from a petrol model this powerful, it struggled with the more precise job of cutting lawn edges.

Sign up to reveal product
First month only £5, then £9.99 per month, cancel any time
Already a member? Log in
View all Grass trimmers and strimmers
LATEST NEWS IN Which? Garden See all news
Top gardening jobs for January

Top gardening jobs for January

29th December 2020 Home & garden
Top gardening jobs for December

Top gardening jobs for December

4th December 2020 Home & garden