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A professional chainsaw with one of the best power-to-weight ratios in the industry.

Rated 4.9 out of 5 by 74reviewers.
Rated 5 out of 5 by Love this saw Had a 311 needed more power so I owned up and bought this beast!! this is the saw you need don't waste you're money on anything else!! February 12, 2015
Rated 5 out of 5 by Great saw I use my 660 in hard wood with either a 20" or 36" bar this saw handled the 36" bar with 3/8 full chisel chain in oak ash and hickory it didn't even slow down. It's not the least expensive option but in my opinion the best saw in this class on the market February 12, 2015
Rated 5 out of 5 by The best big saw besides the ms880 I recieved this saw as a gift from a friend. My 660 has the dual port muffler which is a great feature to have as it adds a little more power. Comfortable easy to use always starts reliable. High compression and lots of power. Great sounding saw when idling and cutting. I use the Rollomatic ES bars (20 and 28 inch) with Stihl chain. Makes for fast cutting. Great saw for all around use from cutting small fallen limbs in yard to small medium and large size trees. This is my in car saw when bad weather hits my area incase a tree falls in the road or limbs. I use Stihl bar oil and tru fuel 40:1 mix in this saw. This saw always gets the job done. January 3, 2015
Rated 5 out of 5 by 660 work horse The 660 Stihl is my workhorse, it doesn't starve for power always starts when I need it to. from -40below winters felling timber to 90deg summers milling timber this is the saw for anyone who wants a QUALITY TOOL. if you use an 8 pin sprocket on any bar under 36" you will be amazed how fast it cuts spend the money and invest in a pro saw anything less is a waste of money December 8, 2014
Rated 5 out of 5 by Exceeds expectations in every category The emerald ash boror has made lots of firewood available in our area. My 290 was doing well, but with so much wood and so little time, I took the plunge and got the 660 with 28" and 36" bars. This saw wears out the wood, and me too. Easily 4 times faster than anything else I've used. From a production standpoint, I've never seen or used anything like it.Keep a sharp chain and a clean air filter on it, and the job is done in no time.STIHL has left no stone unturned in this design. Outstanding piece of equipment. November 25, 2014
Rated 5 out of 5 by This is more than a work horse be ready for a work out I bough my magnum just a few days ago and with the saw I got the 32 inch bar for the tree I was cutting was 49 feet long and the diameter was 32 inch when I started I already knew I had of some what of a beast ,this saw went through the log like a hot knife going through butter the tree was cut up in a matter minutes grant the price was a bit much but with this caliber of tree the cost was right ok this was will wear you out if you are not use to this kind of work.would I recommend it most defiantly November 11, 2014
Rated 5 out of 5 by What a saw What can i say about the 660? This saw is legendary durable powerful and dependable. The saw it self runs very smooth even when cutting. I have to say it is one of my most dependable saws. Its always been there when i need it. The nice part of have a saw like this any thing i encounter it will cut up. i just grin when some one says do you think the saw will handle it. I just grin and say i think so. They are so surprised when it handles the wood as easy as it dose. I just politely tell them its not your everyday saw. I have ran this saw a lot always puts a smile on my face when i run it. Its a saw you just enjoy running at least i do. The saw is very straight forward to work on. That s another thing old style crabs no electronics. Trust me not missing them Also love the old screw caps. I cant tell you how many times i messed with flippy caps to get them right. As long as you feed it premium fuel and synthetic oil its happy . For all that say its eats gas i say yes it dose. But for all the power it makes you have to feed the ponies well for it to run like i dose. I hate to see such a magnificent saw leave us. Stihl is going to the ms 661. It has some big shoes to fill. I hope it fills them very well. Only time will tell. One thing is for sure i will always have a MS 660 with me. I have one and no it will never be fore sale. Saws been to good to me to part with. I could never give it up It be like giving up on your best friend you just don't do it October 23, 2014
Rated 5 out of 5 by Lots of power ... Wow Plenty of power, really a great chain saw. I use it in the Mountians of Montana. Nothing this saw can't handle. What a great Saw. Can't say enough.... Really easy to crank, runs really smooth, cut through a 30" tree like butter. October 22, 2014
Rated 5 out of 5 by This user was blown away! I have never had a chainsaw out last me in a day of cutting firewood! I cut right around 4 cords and had my trailer maxed out way before this saw was done cutting. I ordered the oliomatic chain as well, and it matched the 660 in readiness! For the past 9 years, it has taken me all day to get a good trailer load of post oak firewood, I was done by lunch this year. I am going to buy a bigger trailer after letting this beast loose. The whole day I was waiting on this saw "bog" down and stop spinning while I had the full bar buried in wood and it did not. Everyone out at the ranch were quite jealous. I have never experienced anything like this and I only felt dumb for not buying one of these bad boys years ago. October 20, 2014
Rated 5 out of 5 by Brute of a Saw I've had this saw for 2 yrs. Never ran the original cylinder, sold it, and bought dual port muffler w/o spark screen, and a big bore kit (99-100CC). Had an 044 prior to this purchase with big bore kit and dual port and there is a significant difference in power. This saw can cut up a 90' 18" diameter oak in less than 15 minutes! A little heavier than the 044 but like someone else said, once in the woods with it you spend much less time cutting and handling the saw because of the power. Great saw!Very easy to maintain and disassemble due to the design principles the Germans and Austrians adhere to. With the star wrench and tee socket wrench, the entire saw can be disassembled. KTM's are designed with the same mindset...brilliant. September 28, 2014
Rated 5 out of 5 by A classic for everyday. The best saw ever made. I've owned Pro Stihl equipment since the 1980's and still own/use most of them. The MS660 and his older brother the 066 are the most sought after saws in the world. Those two models have put more timber on the ground, cut the way out of more storm emergencies and made more stick for the woodburner than any other saw in history. No other saw will ever surpass the 92 cc Stihl in that respect and most of them that were ever sold are still running. Look up chainsaw and the MS660 is the picture next to the definition. August 8, 2014
Rated 5 out of 5 by AWESOME SAW Awesome saw, takes everything i throw at it with out question! August 4, 2014
Rated 5 out of 5 by AWESOME SAW!! Have only cut about 10 cords of firewood so far with it and love it so far. Have always used Jonsereds in the past and thought my old 930 was fast till I run the 660 magnum. I put a dual port muffler on and richened up the carb and man did it wake up! The factory muffler is terrible. I know STIHL has to do what they have to do but a single pencil size port on a 92cc saw is just stupid! Saw starts MUCH better now with new muffler and carb adjustments. Used to take 7-8 pulls now starts on 3. The limiter caps on carb jets are a joke too. July 25, 2014
Rated 5 out of 5 by Great Big Saw I purchased this saw to replace an old Husky 371 that was on its second rebuild. The Stihl is a little larger displacement and a little heavier than the 371. The extra power really shows. I can cut 4' diameter fir rounds all day long and the saw never hesitates. The extra weight was a concern but I hardy notice it in the forest.A couple of things that I really like about the Stihl 660:1) The chain stays sharp longer than any other chain I have tried2) The start/kill switch is a little confusing at first but it really makes starting the engine easy3) PowerA couple draw backs:1) This saw really burns up the gas2) Expensive July 18, 2014
Rated 5 out of 5 by Great saw I had my 066 for little over 7 years and its running as good as ever. I use too log for a few years before getting a new job. I still burn wood for my house and I use it every month. July 1, 2014
Rated 5 out of 5 by Great product for the money> Bought the MS 660 Magnum to cut 40 to 50 inch red oak and pin oak. The power band is getting better now as after 3 months it is really beginning to break in. I don't believe a saw is at it's best until after 25 to 30 tanks of gas. Just my view on break in. Running conditions that vary help as well on the break period. I cut 30 to 40 cords of firewood a year. I know, not a lot to some people, but the 660 will make it easier and faster. I run a 25 and 32 inch bar, plenty of power to pull both. Easy to start and clean. Tip to new Stihl saw owners, watch your air filter and you'll be fine. Stihl has done it's part making a fine saw, a little maintenance on my part, this saw should serve me well. I've been cutting firewood for 40 years. June 28, 2014
Rated 5 out of 5 by This chainsaw has a lot of power to weight ratio I just bought a m s 660 with 36 inch bar I put a skip chain for High rpm use it's it allows me to cut through the oak wood with ease I have used the other brands but I'm most satisfied with steel product's I have had steel chainsaws for 10 years some of them are high winding motors some have low torque you need to do research and decide what's best for you this brand will run true and strong as long as you maintain them maintenance is the key May 26, 2014
Rated 5 out of 5 by excellent saw Professional user here and owner, this saw is one of the best saws in my collection for power to weight ratios. The 660 is a heavy saw but has specific purpose, and that is to cut big wood fast. It out runs my 395xp daily no problem. My 660 has minor port work and minor carb adjustments and is my favorite saw by far. May 25, 2014
Rated 5 out of 5 by Work horse saw Have ben using the 660 for 5 or six years. switched out sprockets put modified mufflers with skip tooth chains. Gained a lot more rpm. Cut cottonwoods from 58 to 2inch ash cedar oak. reliability is great getting 3 to 5 years between rebuilds .We use these saws 5 days a week 8 hrs. a day -20 degrees to 105 degrees. As long as you do general maintenaince there bulletproof. April 26, 2014
Rated 5 out of 5 by Ultimate Saw! I originally had a MS390 with good success but wanted a saw with more power and faster cutting ability. I chose the 660 with a 28" bar and it's become my favorite saw. I added a factory dual port muffler and it woke up even more. I also use a stihl tach for precise carb tuning if needed. I found out a full skip-tooth chain works better with the 28" bar. I mostly use it for firewood cutting and clearing trees from storm events on my hunting lease. Torque is what I wanted and I highly recommend this saw if you need to use a 28" + length bar. April 22, 2014
Rated 5 out of 5 by This saw is a beast I've been a proud owner of stihl products for many years I purchased this chain saw a little over a month ago I looked at other brands of chain saws and none could hold a candle to the stihl also great dealer support was a major factor in this purchase as well this chain saw has tons and tons of power I'm running a 36" bar cutting red and white oak around 34" in diameter at the base and this saw just absolutely destroyes anything that it encounters I'm really impressed at the power this saw has and the more you run the saw the stronger it gets as it breaks in this is a very large and powerful saw I would not recommend this saw to the comon homeowner but for a professional who wants quality power and reliability I'd say buy it it's simply a beast March 22, 2014
Rated 5 out of 5 by Power!! This is my first big saw. It is also my first Stihl saw. I cannot begin to explain how quickly and smoothly this saw will cut. It is remarkably light for its size. I have been quite a few full days with it now with no problems. It does drink gas! I use a lot of bar oil too, but I have the oiler turned up as high as it will go for the application I am using it for. The first thing I cut with it though was a 4ft diameter yellow poplar. I was using the 36" bar and 33rs114 stihl chain. It cut through it fast. The saw never bogged down at all in the poplar. The real test will be cutting through a live oak or white oak of the same size. This saw is a robust piece of equipment, and I am very happy with my choice.I purchased this saw to be primarily used for milling. I am running a 36" Stihl bar with a 3/8-.50"-114DL ripping chain. For milling, the ripping chain is a must, and I really wish Stihl manufactured a ready to use ripping chain. March 12, 2014
Rated 5 out of 5 by Incredible Chainsaw I recently purchased my MS660 after having looked at the competition. I chose Stihl due to the several factors. The power to weight ratio is awesome this allows you to get the most out of the 90 plus cc power. The easey filter access not to mention the standard heavy duty filter, which if maintained is reusable. The MS660 clearly puts Stihl in a class of their own. I have found this saw to perform beyond my expectations. Whether I am felling trees or slabbing wood on my portable mill, I have been pleased at every task. March 3, 2014
Rated 5 out of 5 by Love the MS660 and you will too! I bought my MS660 about 3 years ago after some tornados tore down some trees to big for my MS290 to handle. I absolutely love this saw! It really handles BIG WOOD with no problem! It's NOT for a beginner/ greenhorn ! I have a 25" & 36" bar for mine and it handles both very impressively. If you are looking at a MS660 and not sure if it's worth that much cheese I would say Yes! If you buy one you'll be glad you did! I have the value at good because it is a bit pricey, but as always it has the dependability you would expect from Stihl! February 24, 2014
Rated 5 out of 5 by MS 660 I have a MS 660 with a 32 inch bar and 404 chain upgrade,I also have a MS 441 with a 28 inch bar and a MS 192C and a MS 180C. I have owned other saws in the past. I will only own Stihl for there Power, reliability and Performance.I have had Stihl for allot of years now and have never had 1 problem with any of them at all. Stihl makes the Best best Saw Period. February 22, 2014
Rated 4 out of 5 by Great saw could use some upgrades Great saw, i use with 36" bar, 7 tooth sprocket, mainly for bucking large hardwood, i did change the muffler casing from the pencil eraser size output to the thumb size output and added HD2 filter, retuned a little richer, and sounds and works great, except with oiler that puts out less than my old Husqvarna 394, i definitely had to switch to winter bar oil when it gets cold or it won't oil good enough. I guess some replace the oiler with the higher output. The Husqvarna 394/5 may have slightly more power, but is also heavier, and has the outboard clutch, whereas the Stihl is easier to change chains. Very durable saw, i have original 066 that are 20 years old and still run after serious abuse. I am looking forward to 661 mtronic release that will be smoother AV but good to have this in stable. February 21, 2014
Rated 5 out of 5 by MS 660 Magnum I own 4 Stihl saws which are used in the firewood business, Always in the wood. The 038 and 038 super have cut between 10,000 and 12;000 cord each with no problems other than worn out bar oil pumps. Feb 11th, 2014 i bought a new MS 660 Mag and it has really impressed me with easy pull starting, and unbelieveable power to weight ratio. Were cutting 32"-40" dry red oak logs into firewood and man is this stuff HARD! The 660 just melts through the log with hardly no effort on me the operators part. This saw makes it easy to handle BIG wood.I bought STIHL again because of its quality, dependability power and value, break downs are almost unheard of unlike another brand of saw our team uses.I need a saw that requires no " tinkering " i have the saw! Run the brand for 30 years now and i will continue for the next 30 years . .. ..Happy Cutting, John February 18, 2014
Rated 5 out of 5 by Big saw for big wood I got this saw because my other Stihl (011 AV with a 16" bar) was way too small to cut up a giant oak tree. Even with this saw I have to cut from both sides to cut the tree into rounds and then cut the rounds into quarters to be able to move them to the splitter. The vibration is not too bad and it cuts like a charm, even with the bar buried to the hilt. I'm no spring chicken and after 3 or 4 hours of cutting I'm pretty tired, but this saw will do the job. The kick-back hasn't been a problem so far. The saw is a little heavy but manageable. I have only ran 3 or 4 gallons of gas through it but I expect this saw to last a very long time if it is anything like my other Stihl. I had a little trouble re-starting the saw after I ran it out of gas and refueled it.Great product. February 17, 2014
Rated 5 out of 5 by excellent piece of equipment Awesome power and reliability,even in stock form. I depend on this saw for cutting firewood to heat our home, we have never been cold! This saw pulls a 25 inch bar with ease, and no problem with a 36 inch bar for those big jobs. Did a porting job on the cylinder and muffler and this really unleashed the raw power of this machine. Thanks Stihl. February 8, 2014
Rated 5 out of 5 by I love this saw!!! Have wanted one of these bad boys for a long time. I love using chainsaws more than any other tool and this is the ultimate saw. I cut a lot of firewood, some for my own use but most I give away to folks who cannot afford to buy the equipment or wood themselves. This saw really makes this task easier. I have 170, 025 and 361 saws as well and several other Stihl products This saw is by far my favorite! It cuts through some of the nastiest red oak knots like they aren't even there. Christmas eve 2012, during an ice storm, three trees of 35-36 inches in diameter fell on my property. The trunks of these trees were still intact until I bought the 660 three weeks ago. After 4 or 5 tanks of gas she really came alive and chewed through 100 or so feet of big wood in no time! Stihl, we need a splitter that performs like the MS 660! It is a lot of saw for a non-professional but I wanted this beast and have no regrets. If you want it, BUY IT! You won't look back! January 12, 2014
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