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Model#: GWKN20312

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Greenworks 20312 40V G-MAX Lithium-Ion DigiPro Brushless 16 in. Chainsaw Kit

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  • Due to federal regulations, this product can only be shipped within the continental US. Express delivery not available.

Product Overview


Important Notice: Lithium-Ion Item - Express Delivery option not available due to transportation regulations.
Become more efficient when working in your yard with the Greenworks 40V G-Max Lithium-Ion DigiPro Lawn Tool Series, the gas alternative solution you have been waiting on. The DigiPro has a brushless motor for more torque and superior cutting performance and also has an interchangeable battery platform that offer all the tools you need to complete your yard work without sacrificing performance or power.Greenworks 40V G-Max Cordless Lithium-Ion 16 in. DigiPro Chainsaw delivers the power and high performance you need to get your trimming done without the hassle of extension cords or heavy gas powered motors. Featuring a 16 in. steel bar and chain, automatic oiler, tool-less chain tensioning adjustment and a wrap around handle, this chainsaw was designed to make cutting a simple task. The translucent oil tank makes it easy to have a clear view of oil capacity to ensure the highest performance and durability. Whether it is pruning tree limbs or cutting down logs for your fireplace, this is the perfect chainsaw to have around the house to take care of all your trimming needs. Well balanced, clean and easy to transport, this Lithium-Ion battery chainsaw with the brushless motor is a great step forward as an alternative to gas powered chainsaws. The large hand guard protection and safety switch button offers an enhanced precaution feature for any accidental start ups and the electric start feature makes it easy-to-use without the hard-to-manage gas pull start.
  • Digital controlled brushless motor for more torque, longer run-time, quiet operation, and longer life
  • Brushless motor delivers up to 30% more torque for the greatest cutting performance
  • Brushless motor design offers up to 70% less vibration for user comfort while working
  • 16 in. bar and chain perfect for tackling the tough jobs
  • Automatic oiler applies oil to the bar and chain to ensure durability and extend the life of the chain
  • Electronic chain brake prevents from accidental kick-backs
  • Compatible with Greenworks GMAX 40V Li-Ion System for higher efficiency and longer run time with an assortment of tools to complete your yard work
  • Note: 40V G-MAX and 40V Lithium-Ion Batteries are not cross compatible.
  • 40V G-Max Cordless Lithium-Ion DigiPro Brushless 16 in. Chainsaw Kit - 20312
  • 40V G-MAX 4.0 Ah Lithium-Ion Battery
  • Charger
  • 16 in. Bar and Chain
  • Scabbard
  • Travel Bag
  • Owner's Manual


Series: G-MAX
Cordless: Yes
Bar Length: 16 in.
Batteries Included: 1
Battery Amp Hours: 4.0 Ah
Battery Type: Li-Ion
Chain Gauge: 0.050 in.
Chain Pitch: 3/8 in.
Voltage: 40V



4.7 / 5.0
39 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (12)
No, I would not recommend this to a friend (1)
Lightweight (8)
Easy To Use (4)
Ergonomic Design (4)
Powerful (4)
Heavy (1)
Short Run Time (if applicable) (1)
Best Uses
Frequent Use (3)
Small Projects (3)
Heavy Duty Requirements (1)
Large Projects (1)
My second Greenworks saw
I bought this saw to have a lighter saw for use at home. I have a Greenworks 80V saw for farm use some distance away. Both saws are well worth the money.
I don't use chainsaws enough to be comfortable with them. An electric saw is simpler to operate and seems to me to be safer--less noise, no smoke, and you don't start the saw until you have it in position to make the cut. The batteries have all the capacity that I need and more. If you plan on doing extended saw work you may want a second battery.
October 20, 2018
Originally posted at
Convenient & No Fuel
Have had traditional chainsaws and wanted no fuel and less maintenance. Had this chainsaw for about 2 yrs and happy with it. I have 2 batteries and so far get the usage I need since I am out of my tree downing era. Now it's cutting logs into manageable shapes for lathe turning.
August 22, 2018
Originally posted at
Awesome chain saw
Got this chain saw a couple of years ago and it is the best saw that I have.It cuts very well and runs a very long time.Best chain saw run by a battery
August 22, 2018
Originally posted at
Exceptional run time
I have had this chain saw for about 3 years with most of my use of it in the Spring, Summer and Fall. I am always amazed at the long run time I get from the saw. I am often able to buck much more of a tree than I predict. I find it easy to sharpen the chain and find any needed replacement parts online. It is comparable in weight to my old gas powered saw. The self oilier for the chain is great, but do take the time to clean out the housing over the chain from time to time to remove oil caked saw dust. If possible, used up all of the oil in the self oilier before storing it to prevent oil from leaking out when not in use.
August 20, 2018
Originally posted at
I think this would be a good tool, but I'd like to know where I could see it in use and feel it for my self. I bought a gas operated one years ago an it didn't live up to my expectations. Where can I see in action?
August 18, 2018
Originally posted at
no need for my sthil
i have been using my 16" 40 volt instead of my expensive sthil. i don't miss the hassle of trying to start it, bringing it in for repair, lugging the weight around and mixing the gas. i love my g-max and will never go back.
August 15, 2018
Originally posted at
Similar performance to my old 16" gas saw
Bought this in June and was my 1st Greenworks tool purchase. Have had a lighter shade of green brand "X" 18V 10" saw I bought in 2012 along with a gas powered 2.3cc 16" saw that I've had for 18 years that just started giving me trouble last year. The 18V saw with it's really slow chain speed is OK for light pruning, but that is about it. I did not want to get another gas saw, so I started researching Brushless chainsaws, and first looked at the brand "X" 18V one since I own a bunch of this already. Reading chainsaw reviews online, this other brand even in their 40V platform was not highly rated ... the Greenworks 40V on the other hand was closer to the top of the ratings and at a similar price point. Figured if I was introducing another battery platform to my garage, there was no reason to stay loyal. Especially after seeing all the different 40V tools Greenworks offers, all of which blow the other brand out of the water in features, quality, and performance at a similar price point (my brother has a bunch of the other brand's 40V platform that I able to use for comparison.

Back to the saw ... now I've only done 15-30 minutes of light pruning with it so far (up to 4" dia. branches), but with it's respectable chain speed ... variable speed 130-418 IPS no load (vs. a fixed 85 IPS for the 18V saw I have) it performs close enough to my gas saw and is pretty efficient as far as battery usage.

Really like the steel bucking teeth that are typically molded points in the plastic housing on most other brands including my old gas saw.

Also like that it has a chain brake lever like a gas saw where many cordless (including brand "X") this is just a fixed position guard and NOT a chain brake.

I like the product line so much that I've since bought 5 other Greenworks 40V G-MAX tools and have a total of 5 batteries and 4 chargers.
August 14, 2018
Originally posted at
It has passed the test of time
I purchased this chainsaw several years ago ( when it was first available ). I use it all around our 35 acre property for trimming, pruning, removal of dead falls and even some firewood cutting. I was skeptical at first of a cordless saw but have become a true believer. It is lightweight, has excellent power and the battery is more than adequate for my needs. All in all the saw has surpassed my expectations and over the past several years has held up well, is durable and has passed the test of time.
August 13, 2018
Originally posted at
long battery life
I have used this chain saw for 2 years. i mainly purchased this to trim with, it works so well i use it to cut firewood.
August 13, 2018
Originally posted at
Works well, but can be improved
Used this a couple times and cuts well except for saplings which cause chain to knock off. I like the saw and feels good. The bar oil chamber leaks and could be designed better.
August 12, 2018
Originally posted at

Questions & Answers

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Browse 14 questions Browse 14 questions and 14 answers
Will the same battery work with the 12 inch 40v chain saw and also the 40v hedge clipper?
Jim C on Jul 24, 2017
How do I get a replacement, saw chin, for Greenworks 20312 40V G-MAX 16 in. chain saw?
Terry M on May 29, 2017
BEST ANSWER: Please contact the manufacturer direct at 1-888-909-6757 for parts and accessories.
I can't get my battery to charge, so I can run my chain saw
Jean on May 20, 2016
BEST ANSWER: Please contact CPO customer care for more options. 866-577-0663
how do I get replacement, saw chin, for Greenworks 20312 40V g-max 16 in chainsaw?
Terry M on May 29, 2017
Weight of 12"chain saw?
A shopper on Mar 25, 2017
BEST ANSWER: 6.9 lbs is without batter. With battery it weighs 10.4 lbs with battery.
Will the chain oiler work in cold weather?
Fred on Apr 3, 2015
BEST ANSWER: A chain oiler will work in cold weather.
Is this a variable speed saw?
James S on Nov 4, 2017
BEST ANSWER: No, this saw does not offer variable speed.
weight of 16 in saw/?
A shopper on Sep 17, 2017
BEST ANSWER: This saw weighs 7 lbs.
How do I adjust the chain tension and how will I know if it is needed
slick on Jun 24, 2016
BEST ANSWER: There is a chain tension knob located on the side of the saw.
Would the charger for this chainsaw work in Europe where they have 220 V and 60Hz ?
moktar on Feb 14, 2016
BEST ANSWER: No, the Greenworks 20312 is part of the 110v system


Greenworks Warranty


When looking for lawn tools, we know you’re thinking about quality. You’re looking for something that will get the job done and get you back to your weekend. That’s why Greenworks backs tools with a four-year warranty (1 year on Pressure Washers) we know our products will perform at the highest level and always be reliable.


Greenworks products are protected against all defects under normal use for a period of four years (90 days for commercial use) from the shipping date. Pressure Washers carry a 1 year warranty.

Reconditioned GreenWorks products are protected against all defects under normal use for a period of 30 Days from the shipping date.

Greenworks can opt to repair, replace or issue a refund for products that are determined to be defective, or that have been damaged during shipping. Proof of purchase is required. Replacement of products or parts subject to normal wear and tear is the responsibility of the customer. If Greenworks accepts a return under Warranty, you can return the defective or damaged product only after you call and receive a Return Authorization from Greenworks. You also will receive a refund for your original shipping charges, and GreenWorks will arrange and pay for your return shipping charges. Lithium-ion batteries carry a two-year warranty against defects in workmanship and materials. Sealed Lead Acid batteries carry a one-year warranty against defects in workmanship and materials. Batteries must be charged in accordance with the operator’s manuals directions and regulations in order to be valid. See owners manual for warranty details.