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Model # RY10521B

Internet # 202521346

Store SKU # 368902

20 in. 46cc Gas Chainsaw

This item has been discontinued.
The Home Depot no longer carries this specific product.

$179.00 /each




Model # RY10521B

Internet # 202521346

Store SKU # 368902

The Ryobi 20 in. Gas 46cc Chainsaw is designed for aggressive cutting and ultimate control, and features a large 20 in. bar and chain with an automatic oiler for smooth, uninterrupted operation. The 46cc 2-Cycle engine provides reliable performance time after time, and the anti-vibe handle reduces fatigue to help you get the job done fast. The side-access chain tensioning and replacement make adjustments quick and easy.

California residents: see  Proposition 65 information

  • 20 in. bar with a 3/8 in. pitch and a full compliment chain for great cutting performance
  • 46cc, 2-cycle gasoline engine generates great cutting power
  • 3-point vibration isolation for operator comfort and reduced fatigue
  • Inertia-activated chain brake
  • Safe-T-tip helps prevent rotational kickback
  • Side access tensioning for easy adjustments
  • Automatic bar and chain oiler for smooth operation
  • Heavy-duty carry case included
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Bar Length (in.) 
Chain size 
20 in. 
Maximum cut diameter (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
Product Width (in.) 
Antivibration handle 
CA (CARB) Compliant 
CARB Compliant 
Case Included 
Chain brake 
Chain tension adjustment 
Chainsaw Type 
Hand Chainsaw 
Engine Displacement (cc) 
Engine Type 
Fuel tank capacity (oz.) 
Product Weight (lb.) 
10 lb 
Recommended oil 
2 Cycle 
Translucent fuel tank 
Warranty / Certifications
Certifications and Listings 
CARB Compliant 
Manufacturer Warranty 
3 Year Limited Warranty 


Rated 3.7 out of 5 by 129 reviewers.
Rated 5.0 out of 5.0 by Good Fire Wood Saw I have the Homelite (same). I use ti for fire wood, poplar, spruce tamarack, birch, etc. My house is heated by wood. Yes it goes thru bar oil, you will need to sharpen the chain, etc. It's a chainsaw! I've owned/used- pioneer, husqvarna, stihl, poulan, jonsered, echo, etc. I sold my Stihl ms390. 2 years ago (was overpriced junk.. Only good thing about it was i got most of my money back, people seem to think way too much of them?). and yes i know about chainsaws, i maintain & repair them myself. I've used & abused my homelite(again same as this ryobi), it's still working good. Don't get me wrong i'm not saying it's the best thing since beer. But for the money it's a very good saw. I burn around 6 cord of wood a winter. (cord= 4' wide x 4' high x 8' long). I've fallen & bucked big trees for 2 years with it, no issues. If you don't know much about chainsaws, do some research first. Like i said before. Chainsaws go thru bar oil, you will have to mix gas, sharpen the chain, clean the air filter, clean the saw, eventually change a spark plug, etc. It's not the saws fault. March 28, 2013
Rated 5.0 out of 5.0 by Great for cutting up Storm Damaged trees had to pick this up to cut up some trees that had been blown onto a radio tower equipment shed. Cut threw the maple tree like butter, very easy to handle, the chain break is a nice safety feature. I recommend picking up the gas/oil premix blend to get you going right out of the box. the long bar is very nice for going threw thicker trunks, and I MUST say that the end of the bar has a chain guard on it, I LOVE IT, its great for keeping your chain sharp when cutting up logs on hard surfaces like concrete. July 12, 2011
Rated 4.0 out of 5.0 by An excellent saw, with one caveat This Ryobi 20-inch chainsaw is a real workhorse. It's easy to operate, and the anti-vibration feature is noticeably effective. It creates a LOT of sawdust in a short time. I've rated Features, Quality, Ease of use, and Value as excellent. I've given it only four stars as overall rating for one minor reason. I discovered that it's necessary to check chain tension about every 30 - 60 minutes. Other models of saws I've used would operate just fine with the chain a little bit slack. With this saw, the chain may come off the bar. I'll have to admit, when that happened I was working the saw pretty hard in a large maple log. I would recommend it to anyone wanting a 20-inch saw that won't dissapoint you. Just remember to check and adjust chain tension often. It's a quick, simple task. September 18, 2012
Rated 4.0 out of 5.0 by Awesome saw for the price, love it! Worked great, never had a problem starting, whether the saw was hot or cold. Just followed the instructions and it starts right up. Comes with the standard multi tool for chain adjustments and maintenance. Also has a nice case that has slots to store files and othe tools. With the saw in the case, there is still room for a 1qt bottle of bar oil, and a little bottle of the pre-mix. I left the saw in the case sitting upright. It dripped a small amount of bar oil into the case. It was coming from where the bar connects to the saw body. It didn't leak a lot and I think its stopped but nothing new should leak. Vibration resistant hand made a huge difference after hours of cutting. Overall, I'm totally satisfied with the saw. I cut down and cut up several trees with no problems. April 21, 2013
Rated 4.0 out of 5.0 by Gets the job done Worked right out of the box. Took down and chopped up a 24" diameter oak tree. This saw cuts great when chain is new, but the oak dulls chain quickly. Get a 3/16 sharpening file when you get the saw. A chain upgrade might hold the edge better. Follow the starting instructions to the letter and it will start up on a few pulls. Warm starting is hard if you don't follow the instructions. I increased the idle just a tiny bit, but that might just be my saw. Light weight and very little vibration. Gas and bar oil tanks could be bigger for longer work time. All in all a great value that does what it is suppose to do. October 23, 2012
Rated 3.0 out of 5.0 by Good for the price Hard to start the 1st time. Runs good after that. Good for the price I paid. October 20, 2015
Rated 5.0 out of 5.0 by This chainsaw is perfect for the price. I purchased this chainsaw to cut firewood for my lake house property when I am there. I opened the case, added some gas/oil mix, also added chain lube and this chainsaw started on the first pull. It cut the 16" diameter tree like a hot knife on butter. I have always been a huge fan of Ryobi products and this is another great product that they have produced. September 4, 2013
Rated 5.0 out of 5.0 by Ryobi 20" Gas Chainsaw I have only used this for about 15 minutes.. Pretty happy with the saw so far. Cut 6 - 8 inch limbs, no big deal. The Ryobi starts very quickly, just read the directions. I'm satisfied with the purchase. Unless something goes wrong with my collection of Ryobi tools, l am converting to 24 volt from the wearing out 18 volt equipment. Your right , I'm a Ryobi fan! November 3, 2015
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