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Model#: GWKN21332

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Brand new items;Full manufacturer warranty available
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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
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Greenworks 21332 40V G-MAX Lithium-Ion 13 in. String Trimmer (Tool Only)

  • Greenworks 21332 40V G-MAX Lithium-Ion 13 in. String Trimmer (Tool Only)
  • Note: Battery & Charger sold separately
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Become more efficient when working in your yard with the Greenworks 40V G-Max Lithium-Ion Lawn Tool Series, the gas alternative solution you have been waiting on. This interchangeable battery platform offers all the tools you need to complete your yard work without sacrificing performance or power.Greenwork's 40V Cordless G-Max Lithium-Ion 13 in. String Trimmer delivers the most power and more options in its class making it a strong opponent to its gas powered counterparts. At 9,000 RPM, the 21242 is quieter and will rip through long grass, stubborn weeds and hard to reach areas with ease while lasting 40% longer than its competitors. Designed to work with you, the 21332 telescopic shaft, innovative multiple position swivel head, easy edger converter and variable-speed trigger allow you to rotate and adjust accordingly to each user for enhanced mobility and user experience in order to get the job done faster and more efficiently.
  • Premium power up to 50-min of run time with the G-Max 40V Lithium-Ion 4.0 Ah battery, this trimmer offers a variable-speed option for maximized power to tackle the toughest weeds in your yard.
  • Adjustable multi-position cutting path of 10 in. or 13 in.
  • Automatic 0.65 in. single feed line.
  • Easy conversion button from trimming to edging and gliding walk behind wheel provide the best result for your yard.
  • Flower guard allows you to trim around your flower bed or other hard to reach areas without harm.
  • Cushion and over-molded grips increase operator comfort.
  • Lock-off switch prevents accidental start ups.
  • Note: 40V G-MAX and 40V Lithium-Ion Batteries are not cross compatible.
  • 40V G-Max Cordless Lithium-Ion 13 in. String Trimmer (Tool Only)
  • Tool Only - Batteries and Charger Sold Separately
Compliance and Restrictions
warning: Cancer and Reproductive Harm --


Cordless: Yes
Weight: 5.62 lbs.
Batteries Included: 0
Battery Amp Hour: 2 Ah
Battery System: 40V G-MAX
Battery Type: Li-Ion
Blade Construction: String
Bluetooth Compatibility: No
CSA Safety: Yes
Case Included: No
Charger Included: No
ETL Safety: No
Handle Type: Wrap Around
Motor Type: Brushed
No-Load Speed (SPM): 9000
Power Source: Electric - Cordless
Speed Settings: Variable
Starter Type: Electric
UL Safety: No
Voltage: 40V
Wifi compatibility: No



4.1 / 5.0
24 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (14)
No, I would not recommend this to a friend (4)
Powerful (10)
Lightweight (7)
I love the greenworks products. Light and easy to handle. The instructions for the weed wacker were not clear to understand, but finally figured it out.
July 28, 2018
Just got mine. It works great, but I agree with one of the earlier comments that the string needs to be stronger and I intend to change it when the factory string runs out. It works fine with my hedge trimmer battery and did my whole yard with less than half of that battery. I have a one half acre yard.

Assembly instructions are not real good. Don't tell you there is a button on top of the bottom shield which rotates the bottom mechanism. Once you figure that out, it is pretty easy to put together.

So far, think this is a great value and just right for me.
April 26, 2018
Not so good
I purchased the string trimmer last year and have used it 4 times. It is uncomfortable to operate, the wheels are flimsy which makes it impossible to get a straight edge, and the string will not advance when needed. This is disappointing since i thought that if I spent more I would get more. My mistake.
June 2, 2017
Great product, a little heavy
I do love this product, and have the mower as well, so loved that I could use the battery from the mower.
The handbook/guide is pretty bad, not written in a way that actually helps you assemble or use the product and get the most out of it.
May 25, 2017
Greenworks GREAT!
I love my Greenworks products the trimmer and last year I bought the mower. The 40G batteries are powerful and long lasting. The trimmer is very easy to use and it is not loud at all.
March 21, 2017
Pleased with my purchase!!!!
Battery is very powerful and lasts a long time compared to other battery operated tools I have. It works so well one has to be careful not to eat up something that should be left alone. I have other Greenworks tool (blower and hedge trimmer) that I can share the battery with. They all work great.
October 11, 2016
Yes, I would recommend this to a friend
Comfortable to use if you adjust it properly
The unit has several adjustments. Experiment with head angle and sliding handle. The 4AH battery fits tight in the unit, and is heavy. The 2AH battery works just fine. Lots of trimming against fencing, wire and wood. If the cap is not installed correctly on the spool, the unit will not advance. Throttle back to low speed to prevent excessive line use.
August 19, 2016
Yes, I would recommend this to a friend
Trimmers line is garbage tool is nice though
Tool is good, line is garbage
July 25, 2016
Yes, I would recommend this to a friend
works well
i did my yard and the battery still had half a charge left.. it worked good on trimming grass which is all i need..
July 20, 2016
No, I would not recommend this to a friend
Web site will not allow me to type out what I want , so trim
Love green works,But the trimmer ,handle to long,wheels mount on trimmer guard and hard to adjust .i would love to talk to green works about this.
Dan Baldwin
You know my e- mail
June 28, 2016

Questions & Answers

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Browse 10 questions Browse 10 questions and 19 answers
How do you advance the string on this trimmer?
Ann on Aug 21, 2016
BEST ANSWER: Every time you start it, it automatically advances the string ¼" of an inch. If your string is too short because you hit something that broke it off close to the hub, you have to start and stop the machine multiple times to advance the string.
does this include battery?
A shopper on Oct 8, 2017
BEST ANSWER: I bought mine without the battery. Found a 40V battery and put it all together and love the results it produces.
Is this new or reconditioned?
Dick on Sep 22, 2014
BEST ANSWER: This is a new item.
I need greenwark if I bay haw I get battery chager?
A shopper on May 7, 2018
What size or name for string in this weedeater
Me on Jun 8, 2016
BEST ANSWER: Model number for replacement spool and string is GWKN29252
Where can I find replacement "lines" for this model?
linda on Feb 16, 2016
BEST ANSWER: Greenworks 29092 .065 in. Single Line Replacement Trimmer Line
Does this unit operate with both the 2AH &4AH 40v Gmax batteries. I have the 2AH Gmax can I use it with this model
conjureman on Oct 13, 2015
BEST ANSWER: Yes, the 2ah battery is compatible with model 21332
Is there a trimmer that will work with the REGULAR 40V battery I have for my blower?
AP on Mar 27, 2015
BEST ANSWER: The only 40 volt trimmers that CPO handles is the 40v G-MAX trimmers.
If I have the G-max 40V batteries for my Greenworks lawnmower, I can use them with this tool?
KellyE on Jan 23, 2015
BEST ANSWER: Yes, as long as the battery is 40v and Gmax.
is it true that the greenworks g-max trimmer 40 v battery is not interchangeable with other greenworks 40 v battery products?
Bob on Jul 21, 2013
BEST ANSWER: Yes, these two batteries are not interchangeable. A GMax tool must use a GMax battery. Also, same for the regular Greenworks 40V battery.