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The Lawn Review: Home » Ryobi 40V Weed Whacker: 2023 Review

Ryobi 40V Weed Whacker: 2023 Review

The Ryobi 40V weed eater was the first weed eater I ever owned, so it makes this product super easy to review.

In fact, I bought the Expand-It version with the blower and edger attachments. Ryobi has a series of 40V lawn equipment, most notably the tools I just mentioned here. Recently, Ryobi has gotten into the lawn mower game as well. 

The Ryobi 40V weed eater is a great trimmer but there are a few things you should know before buying.

Today we are going to review:

Why we review lawn tools

The reason we started this website in the first place was because we had so much trouble trying to find reasonable, understandable, honest reviews for lawn equipment. And it’s not cheap! After hours and hours of research, trying products and returning them, and messing up our yards – we started this site. 

review lawn tools
We have great ways of testing.

As people who had to learn the hard way, we want you to know exactly what you are signing up for before you purchase a piece of equipment. That’s why we are committed to providing honest, easy-to-understand reviews that mean something.

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weed eater string

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Why would I buy an electric weed eater?

There are a few reasons to check out an electric weed eater when picking out your next lawn and garden tool kit. As compared to gas-powered weed eaters, electric weed eaters tend to be easier to use and maintain. At the end of a long winter season, you may have to refuel your gas powered weed eater and crank it a few times before you can get it to start. With the Ryobi 40V weed eater and other electric weed eaters, you simply place the battery and you are ready to go. 

Another benefit to electric trimmers is maintenance. You will not have to do anything to maintain an electric trimmer other than change out the line. No oil change, no filter change, and no messy gasoline spills. 

If you are a Ryobi loyalist and have one of their mowers, then you can actually use this same 40 volt battery in both the mower and the trimmer. More on that later. 

Ryobi 40V weed eater parts

The diagram below shows all of the parts involved in the Ryobi 40V weed eater. As you can see, this product detaches just below the handle to allow for other attachments. 

To detach the attachments, simply untwist the knob and press the silver button to pull out the attachment. Likewise, to reattach another attachment, simply align the silver button with the hole and slide in. Twist the knob to tighten in place and you are ready to go.

As you can see, the bottom has a “Reel Easy” (ha) bump feed string head with a “speed” winder. When you get low on string, the head has a button that will push out a little bit more if tapped.

Ryobi 40V weed eater expand it head
The “Reel Easy” head of the Ryobi 40V trimmer.

Ryobi 40V weed eater tool only

If you already have a Ryobi 40V battery, you can purchase this product “tool-only”. A tool only product comes without the battery and is generally a lower price. This is great for those that have multiple Ryobi products, like the Ryobi mower.

Ryobi 40V weed eater diagram
Ryobi 40V weed eater diagram from Ryobi’s website.

Reviewing the Ryobi battery-powered weed eater

Let’s take a look at all of the things you should consider before buying a new weed eater.


The Ryobi 40V weed wacker has a modest amount of power. Honestly, I did not feel like the weed eater packed nearly the punch that its gas powered counterparts do.

Further, the electric weed eaters have to really “wind up” and get momentum before they reach their full speed. Because this tool isn’t specifically designed for weed eaters, it has to be very adaptable in how it produces power.

There is a little rod that twists around inside the attachment which drives the speed of the head. Torque is applied all the way down the rod and you can tell a lot of energy gets lost in the process. 

If you are looking for a weed eater that can take on a big job, the Ryobi 40V weed eater simply is not your tool. For small yards and some light brushwork, this weed eater will do just fine. 

A step up in power from this weed eater is the EGO Multi-head tool with the string trimmer attachment is amazing.

Durability and usability

The Ryobi weed eater is one that has lasted surprisingly long. I have had mine for over three years and only replaced the line one time. It has consistently operated at full capacity and I have never had issues with breaking, slowing down, or otherwise. One thing I don’t like about the handle of this particular weed eater is that it always feels like it is in the wrong spot. 

With the Ryobi 40V weed whacker having multiple attachment heads, it means you can really slide the attachment into the tool facing any direction. While this might seem convenient, it’s really hard to tell which angle you should keep it at for the best trim job. When I use the weed eater, I feel like I am holding the trimmer at a weird angle and twisting my wrists or arms to make it go where I want it to go. 

ryobi 40v blower attachment
Make sure not to get this one.

UPDATE: I took the guard off of this weed eater and it performs way better and is so much easier to use. Take it off and throw it out!

Comfort and feel

Another downside of this weed eater is the balance. Consider that this battery is also used on their 40V lawn mower, meaning it is quite heavy. The tool feels great, light, and balanced before I add the battery. Once the battery is added, you have to exert a lot of upward pressure on the back of the weed eater, making straight lines and other maneuvering very difficult. 

I know it sounds silly, but when you start to feel that burn in your shoulder and neck area from holding a weird position, you will regret not buying a better balanced product. I have not seen an available shoulder sling or other device that can help keep it aligned, either. 

The heavy head of the Ryobi 40V weed eater.
The heavy battery that accompanies the Ryobi 40V weed eater.

Maintenance and string replacement of the Ryobi electric weed eater

As mentioned previously, maintenance is not required at all on this product. You will have to replace the strings, however. Replacing the strings on this weed eater was one of the more infuriating moments of my life. I really struggled to figure it out on my own and had to make the below video on YouTube to get it right. 

Finally got it!

Replacing strings on these is super frustrating because you have to very delicately weave it through while trying to maintain the bundled line from falling out and making a big slinky.

Battery life

The Ryobi 40V battery is also used for the mower, so you better hope that it lasts for a long time if you only use the weed eater. It does. The weed eater lasts a really long time in my experience.

When I have used this attachment, I usually start with the trimmer attachment, then switch to the edging attachment, then finish off with the blower. To my knowledge, I have only gone through the battery fully one time. The first day of the spring season, I edged my lawn for the first time of the year and dug up a lot of dirt. When finishing off with the mower, the battery died. 

For most small jobs and especially for the weed eater, you will not have any issues with getting your job completed.

The official review: Ryobi 40V weed eater

FeatureRyobi 40V weed eaterGas powered weed eater
Difficulty to useLess easy to maneuverEasier to maneuver
DurabilityVery durableVery durable
MaintenanceEasiest to maintainLess easy to maintain
ValueMedium valueHigh value
For lots <10,000 sq. ftHighly recommendedLess recommended
For lots <1 acreRecommendedHighly recommended
For lots >1 acreNot recommendedHighly recommended

To summarize our review, the Ryobi 40V weed eater is a good weed eater if you have a relatively small yard and/or small job. This weed eater is simply not very comfortable to use, but makes up for the lack of comfort with sheer convenience. The ability to just attach the battery and start on the job makes this super easy for those with not much land to cover.

Ryobi 40 V weed eater assembled
The fully assembled Ryobi 40V weed eater.

I recommend this weed eater due to the ability to leverage this battery with other Ryobi tools, its convenience and simplicity, and using the various attachments to have an all-in-one approach to taking care of your yard.

You can grab it with the battery on Amazon for a great price or at Home Depot (where it may actually be cheaper).

If you have a big yard or typically spend a lot of time trimming, I would check out one of the gas powered weed eaters. 


Alex K

Alex is a lawn tool enthusiast who cut his teeth as a normal Joe lawn dad. After burning through expensive, fancy tools, Alex became dedicated to finding the best tools on the planet. He is now a leading expert on electric lawn tools, quoted in the Washington Post among other publications.