MS 661 R C-M

MS 661 R C-M
The MS 661 professional chainsaw with a wrap-around handle (R) for greater maneuverability.

Model Features

  • Reduced-Emission Engine Technology - Caring for Nature
    The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards.

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  • STIHL M-Tronic™ 
    This product features M-Tronic™ (M) - a new generation of Intelligent Engine Management that eliminates the low and high speed carburetor adjustment screws, compensates for dirty air filter and changes in elevation and fuel quality for optimum engine power at all times.

    See it in action!

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  • Wrap Handle (R)
    Saw can be used in multiple positions for felling or limbing with hands in the proper positions.
  • Anti-Vibration System
    STIHL has developed a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
  • STIHL ElastoStart™
    The ElastoStart™ starter handle is an exclusive feature of STIHL. It is a starting grip with a built-in shock absorber that helps reduce the effort when pulling on the starter cord. The ElastoStart™ starter grip noticeably reduces the sudden peak forces (compression) normally felt during cranking. The forces which occur at the grip after the first compression stroke are smoothed out.
  • Decompression Valve
    The decompression valve, also referred to as 'deco' or 'deco valve', vents compression in the cylinder for easier starting. The decompression valve temporarily reduces the compression in the combustion chamber during cranking and helps reduce the effort needed to pull the starter rope. It is opened manually and closes automatically as soon as the engine fires.
  • Side-Access Chain Tensioner
    The side-access chain tensioner makes it much more convenient for the user to adjust the saw chain with a bar wrench as opposed to the typical location of the guide bar adjustment screw.
  • Adjustable Automatic Oiler
    The Adjustable Automatic Oiler allows the user to adjust the lubricant of the guide bar and saw chain for different bar lengths and cutting conditions.
  • Toolless fuel and oil caps with retainers
    Simply lift the lever and twist the caps to remove or tighten. There‘s no need to use a tool to tighten or loosen.

Specifications

DISPLACEMENT
91.1 cc (5.56 cu. in.)
ENGINE POWER
5.4 kW (7.2 bhp)
POWERHEAD WEIGHT
7.66 kg (16.8 lbs.)
FUEL CAPACITY
825 cc (27.9 oz.)
CHAIN OIL CAPACITY
360 cc (12.1 oz.)
OILOMATIC® CHAIN
33 RS3
GUIDE BAR LENGTHS* (Recommended ranges)
40 to 80 cm (16" to 32")
POWER SOURCE
Gas
STIHL recommends #3624 (33 RS3 84) OILOMATIC® saw chain and 25" 3003 000 4030 STIHL ROLLOMATIC® ES guide bar combination. The actual listed guide bar length can vary from the effective cutting length depending upon which powerhead it is installed.

Important Information

WARNING! The occurrence called “kickback” can cause serious or fatal injury. Always read the instruction manual carefully before using your saw. STIHL uses a green and yellow color-coding system to help you select a powerhead, bar and chain combination that complies with the kickback requirements of ANSI Standard B175.1 (gasoline-powered saws) and §30 of UL 1662/ ANSI Standard B175.1 (electric chainsaws). Ask your STIHL dealer about safe operating procedures and the advantages of the STIHL Quickstop® chain brake, STIHL Quickstop® Plus (Q) additional chain braking feature, STIHL reduced kickback bars and STIHL low-kickback saw chains.

STIHL recommends the use of green reduced kickback bars and green low kickback chains on all STIHL chainsaws.

* The actual listed guide bar length can vary from the effective cutting length based on which powerhead it is installed on.

Note: STIHL recommends use of fuel with no more than 10% Ethanol content. Using fuel with greater than 10% Ethanol content may cause damage to your equipment and may void your STIHL warranty. Learn More…

WARNING! Improper use of any power tool may cause serious or fatal injury. Read, understand and follow carefully the operating and safety instructions in your instruction manual before using such products.

STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.

Reviews

MS 661 R C-M is rated 4.5 out of 5 by 16.
Rated 4 out of 5 by from Great power out of this saw but... I love the power and features however it cottons to have hot start issues which I've been hearing about a lot more. I will love this saw more if it gets fixed correctly...
Date published: 2016-10-04
Rated 1 out of 5 by from This saw has descent features but is absolutely unreliable i have 2 and they blow up every 50 hours of use completely unacceptable Have had nothing but problems with 661 blow up every 60 to 80 hours
Date published: 2016-09-09
Rated 5 out of 5 by from The F1 of Stihl saws I'm a timber cutting contractor. I've been cutting for nearly 40 years. I run a saw 7 hours per day. I've owned over 50 Stihl pro saws. I have never been so impressed with a new saw as I am with this one. The one major change over the 660 is the automatic carb. I thought I would hate it but I absolutely love it. Starts easy and runs perfect. The multi switch is great- it always springs back to the run position. Super handy. The bar nuts are attached to the clutch cover- try losing one of those! The starter/fan cover is flatter and consequently MUCH easier to sight with. It also has a sight that runs parallel to the bar when you're getting down to the last of your holding wood. Brilliant! The air filter lasts all day even here in California's dry Sierra bark dust. Spring anti vibe is definitely smoother than rubber. Muffler is quiet. Love the "can't lose 'em" fuel and oil cap. Super torque but revs like an F1 racer. And to top it all off, it burns about 20% less fuel than the 660! We still have some pretty big wood here in CA (I get at least one 5' every week) and this saw was made for what I do. Love it!
Date published: 2016-07-10
Rated 5 out of 5 by from Excellence personified I stepped up to the MS 661 RCM with a 36" bar from a Husky 455 Rancher and won't go back; I'm a Stihl convert! Tremendous power, runs like a champ, I love the wrap handle. You get what you pay for and it's worth every penny, what a saw!
Date published: 2016-06-28
Rated 5 out of 5 by from Saw is a BEAST! This saw was a power house right out of the box. The only modifications I have made to mine were replacing the exhaust with a dual port and removing the spark arrester. This saw, with a good sharp chain, will make VERY quick work of ANY size tree! I have have this saw, an older 066 Magnum, 056 Magnum 2, 056 Super and even an 045 Super. All of these saws, even after DECADES of HEAVY use, still run great! Some have need repairs over the years from massive amounts of wear, but these saws are tanks. Built for professionals. They are all I will ever buy, hands down.
Date published: 2016-04-26
Rated 5 out of 5 by from Awesome Saw Better With Wrap Bar I still use my 660 but not as much as the 661. It has a stong powerband in the wood. The M-Tronic and great antivibe are big improvements over the legendary 660. The wrap handlebar makes it more versatile felling. Big, smooth power.
Date published: 2016-04-05
Rated 5 out of 5 by from mini mill monster This saw is great for a lot of applications. I have been milling with it and I am very happy with its power. It glides through soft and hard wood and bucks logs like a light sabre. Happy to have it with my smaller stihl saws.
Date published: 2016-03-14
Rated 5 out of 5 by from Gotta love the power This is the saw for a professional that wants a versatile saw runs 25" to 40" bars and chains like a dream. I would recommend full skip chisel chains on the longer bars. Been a little over a year now and haven't had any issues. I would get another one when this one wears out.
Date published: 2016-03-10
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Standard Features

  • Common Features for Chainsaws
    View the features common to many STIHL chainsaws.

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