Model # CS-450P-20

Internet #202641438

ECHO 20 in. 45cc Gas Chainsaw


20 in. 45cc Gas Chainsaw

  • 20 in. bar and chain easily cuts through tough branches
  • 2-stroke 45cc engine gives you a professional performance
  • Digital ignition adjusts engine timing automatically
$39900 /each
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Frequently Bought Together

Product Overview

This ECHO chainsaw has engine ignition timing that is computer controlled to improve performance at idle and through tough cutting applications. This unit comes with a 5-year consumer 1-year commercial warranty.

  • Assembled dimension: 9.9 in. W x 15.7 in. D x 10.9 in. H
  • Heavy duty, easy-access, automotive-style air filter extends engine life
  • Digital ignition automatically adjusts engine timing
  • 5-year consumer / 1-year commercial warranty
  • Automatic, adjustable, clutch-driven oiler
  • 45.0cc professional-grade 2-stroke engine

Info & Guides

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Bar Length (in.)
Chain Size
20 in.
Maximum Cut Diameter (in.)


CA (CARB) Compliant
CARB Compliant
Chain Pitch
Chain Speed (mps)
Chainsaw Size
Chainsaw Type
Hand Chainsaw
Drive Links
Engine Displacement (cc)
Engine Type
2 Cycle
Antivibration Handle,Chain Brake,Tool-Less Chain Tensioning
Filter Type
Felt Filter
Fuel Tank Capacity (oz.)
Handle Type
Rear Handle Chainsaw
Chain,Scabbard,Scrench/Combination Wrench
Power Type
Product Weight (lb.)
Torque Maximum (Nm)
Usage Type
Professional Chainsaw

Warranty / Certifications

Certifications and Listings
4-UL Certified
Manufacturer Warranty
5 years consumer / 1 year commercial

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Customer Questions & Answers

Are dogs available for this saw?

If dogs are available what is the part number? Actually it looks like Echo doesn't include dogs on any of it's saws...?
Asked by: doob
Hey, the dogs that come with it are perfectly fine for what you're gonna do. If you're playing around with a 24" bar, then you might need more significant dogs.... But this baby's good to take home!!
Answered by: MisterBobInEastTexas
Date published: 2015-10-30

I lost my owner manual how do I go about getting a new one?

Asked by: Anonymous
Good Lord! The manual for practically everything is on the net. Just Google it.
Answered by: MisterBobInEastTexas
Date published: 2015-10-30

Is this a commercial grade chainsaw?

Asked by: Davids
Yes, the CS-450P is considered to be a commercial grade Chain Saw model.
Answered by: Echo
Date published: 2017-07-23

Would this model be the best for a large tree trunk approx. 36" diameter? He has a 20" Echo CS-...

Would this model be the best for a large tree trunk approx. 36" diameter? He has a 20" Echo CS-440 but it is finally wearing out.
Asked by: ginafina
ECHO chain saws can effectively cut up to 1-3/4 the length of the bar being used on that unit. That would be the maximum diameter the chain saw can cut.
Answered by: Echo
Date published: 2017-05-04
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Customer Reviews

20 in. 45cc Gas Chainsaw is rated 4.7 out of 5 by 27.
Rated 5 out of 5 by from Love it!! We recently bought 10.5 acres of heavily wooded land and needed help clearing some trails. The man at hardware store recommend this and we love it. Easy for me to start and use, not too heavy. Came with awesome warranty.
Date published: 2017-03-18
Rated 5 out of 5 by from One cutting machine You don't we're a hoodie with a kangaroo pouch. Because if you do. It's going to be filled with wood chips
Date published: 2017-04-25
Rated 5 out of 5 by from great product, as usual! This cs450p replaced my basically new stihl ms250(also 45cc). the stihl was always leaking bar oil or fuel or sometimes both! Also, on numerous occasions the Stihl failed to start. I found myself using old faithful( my 18 year old cs3400), which as never let me down...... ok, it did once! A few years ago I had to replace the primer bulb due to cracking(age). I also have a pb2400 leaf blower that was purchased at the same time as the cs3400 and I've never had to fix anything on it.....ever........... Same is said for my Echo srm230 trimmer(which is only 5 years old)........This is why I went with Echo again!
Date published: 2014-11-13
Rated 5 out of 5 by from bread little sw bought this saw a couple years ago from home depot to replace a homelite 4550. wanted a better 45cc saw w/ a 20" bar. no such model in the stihl line-up. have used it for felling and limbing trees for firewood--10 cord so far. is nice and light but powerful for the task. very sturdy saw. feels like a pro saw and is well made and bullet proof. highly recommend.
Date published: 2014-07-31
Rated 4 out of 5 by from runs forever but.... I own a landscaping and tree service company. I run ECHO everything from string trimmers,blowers and saws. now for the good stuff. This saw will run forever for any homeowner and professional. If your planning on felling trees I suggest getting the 550cp for extra 20 bucks. This saw will bog out when tested, I've ran Stihl and Huskee saws and this one is always my first choice. Like I said great saw and extremely comfortable to use but for an extra 20$ you wont regret the extra power when you need it.
Date published: 2011-11-29
Rated 5 out of 5 by from Outstanding Performance I recently purchased (Oct 2016) the Echo CS 450P chainsaw. I bought it from a local farm/feed supply store in my home town in Missouri. I have used it several times already and I am astounded by the incredible performance this machine delivers. One or two effortless pulls on the pull cord and it's "off to the races". The 45cc power that this tool provides cuts through some of the toughest hard wood trees with ease. The ability to change out the bar and chain for bigger jobs 16", 18" and 20" was just another added bonus. I made the decision to buy this model because I also purchased the CS 590 Timber Wolf with the 59.8cc engine approximately six months prior and completely fell in love with the Echo brand. I did my homework prior to buying an Echo product and found that it not only totally out-performed its major competition, but also had the best warrant in the industry providing you comply with the warrant guidelines just as any other reputable company would require. I owned a couple of other chainsaws in the past (makes I would rather not divulge as not to discredit them completely). But when you compare honey crisp apples to sour lemons, it doesn't take a genius to figure out how you'll benefit by investing in a very high quality product such as an Echo brand chainsaw. Thanks Echo, keep doing what your doing. Your outstanding reputation speaks volumes concerning you're professional character. PS: I will be writing a separate and very favorable review concerning my awesome CS 590 Timber Wolf as well. Thanks again Echo! Sincerely; Rob Lundberg (A very satisfied Echo customer)
Date published: 2016-11-04
Rated 5 out of 5 by from Nice Chainsaw. Cut up a downed pine and pecan tree with this thing. Took me the better part of the entire day, it never even slowed down. Nice sharp chain, cut the pine and pecan like it was butter. Hope it lasts a long time!
Date published: 2011-11-22
Rated 5 out of 5 by from Easy starting ! Good Power I was a Husky owner and proud of it bought 3 back in the 80's along with a cs 3400,guess which one started last year, that's right the cs3400 ! the Husky ALL have bad coils No more Huskys ! its ECHO or nothing !
Date published: 2015-04-14
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