MS 661 R MAGNUM®
Wrap-handle chainsaw that delivers the professional power and rugged dependability you need to take on tough felling jobs.
The MS 661 R MAGNUM® professional chainsaw delivers the reliable power and rugged dependability you need for felling, de-limbing, and bucking large diameter trees. This chainsaw features a simple, proven, and non-electronic design. A fuel-efficient engine and low-maintenance air filtration system help keep operating costs low, while the STIHL anti-vibration management system reduces operator fatigue and improves handling when compared to the MS 660, even when using long guide bars. The MS 661 R MAGNUM® chainsaw is the perfect partner for forestry, municipal, and tree service professionals. Stop by our dealership today!
| MS 661 R MAGNUM® Specifications - Professional Use | |
| POWER SOURCE | Gas |
| POWERHEAD WEIGHT | 16.8 lbs. |
| GUIDE BAR LENGTH (Recommended) | 25 in. |
| OILOMATIC® CHAIN | 3/8" RS3 |
| CHAIN OIL CAPACITY | 13.5 oz. |
| ENGINE POWER | 7.2 bhp |
| FUEL CAPACITY | 28.7 oz. |
| DISPLACEMENT | 91.1 cc |
| Note: STIHL recommends #3624 (33 RS3 84) OILOMATIC® saw chain and 25" 3003 000 4030 Ematic™ guide bar combination. Compatible guide bar ranges: 16" to 36" | |
Important Information
IMPORTANT SAFETY INFORMATION
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 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.
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.
Model Features
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Fuel and oil caps with retainers
The fuel and oil cap retainers keep the caps attached to the unit for added convenience. -
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. -
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. -
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. -
Decompression Valve
The decompression valve reduces the compression in the combustion chamber during cranking and helps reduce the effort needed to pull the starter rope. -
Wrap Handle (R)
Saw can be used in multiple positions for felling or limbing with hands in the proper positions. -
HD2 Air Filter
The HD2 air filter on this unit is washable, providing extremely long filter life and lowering maintenance costs. The large surface area allows for longer run times between cleanings and high performance even while operating in dusty and dry conditions. Overall, the HD2 air filter provides better protection of the engine compared to standard air filters.
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SPECIAL OFFER
Pro Mark™ Chainsaw Boots
No matter the location or climate, experience the protection and performance of the STIHL Pro Mark™ Chainsaw Boots. Engineered with an inner GORE-TEX® fabric and an orthopedic removable insole, this water-resistant boot combines optimized breathability and comfort. Its deep lacing hooks help keep your feet securely fastened while you’re hard at work. Complete with a padded steel toe and a comfort sole made of rubber, this high-quality black suede work boot is designed with safety in mind. The hardworking STIHL Pro Mark™ Chainsaw Boot meets OSHA requirements for protective footwear in chainsaw use, as well as EN 17249 (Class 2) and EN 20345 S2 requirements for chainsaw protective boots.
The STIHL Pro Mark™ designation identifies products for professional users.
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SPECIAL OFFER
HP Ultra 2-Cycle Engine Oil
No matter how you slice it (or trim it or shred it), there’s no better protection for your high performance 2-stroke engine than STIHL HP Ultra Oil. This 2-cycle engine oil has outstanding engine cleaning characteristics, plus “ultra” lubricating qualities that are superior to other 2-cycle engine oils. This fully synthetic oil is also highly biodegradable, degrading by 80% in 21 days. We’re so confident this oil will protect your engine, we’ll double your STIHL limited warranty* when you use it. It’s that good.
*Double your warranty when you purchase either STIHL HP Ultra Oil (six pack) or STIHL MotoMix® Patented Premixed Fuel (one gallon minimum) with your STIHL product purchase. Double limited warranty protection applies to select STIHL gasoline-powered products purchased for personal non-income producing, household purposes only. Other restrictions apply. See dealer for details or refer to STIHL’s Limited Warranty Policy.
Unopened container shelf life: 4 years from the date of filling, in originally sealed containers.
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SPECIAL OFFER
2 in 1 Filing Guide
The STIHL 2 in 1 Filing Guide simplifies the process of sharpening your saw chain by completing two functions at once – sharpening your saw chain cutters and lowering your depth gauges. The ease and accuracy of this unique accessory makes it the perfect system for maintenance of your STIHL chainsaw. The system includes two round files, one flat file, and comes with a unique file holder and filing guide. The STIHL 2 in 1 Filing Guide gets more done with each stroke, so you can spend less time sharpening your saw chain and more time putting your chainsaw to work.
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For Your Safety
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SPECIAL OFFER
Pro Mark™ Apron Chaps - 9 Layer
For heavyweight protection that won’t weigh you down, choose Pro Mark™ Apron Chaps - 9 Layer from STIHL. They’re rugged, yet comfortable to wear and easily fit over your work clothes. Sewn into the legs of the chaps are nine layers of Avertic® Pro by Engtex®, a cut-retardant material designed to reduce the risk or severity of injury to the body parts covered by the pads in the event of contact with the rotating saw chain of a gasoline-powered chainsaw. The open-back design of these chaps makes them a great choice for hot working conditions. These Pro Mark™ apron chaps provide three additional layers of Avertic® Pro by Engtex® cut retardant material than our standard apron chaps. STIHL chainsaw protective apparel is also wash and wear, unlike some other brands that require dry cleaning or light surface cleaning. These chaps feature a reflective waistband for better visibility, a zipper cargo pocket for easy storage, and an abrasive knee for bending and kneeling.
The STIHL Pro Mark™ Protective Apparel is best paired with Professional STIHL units. This line of personal protective apparel is designed for professional users, helping protect against injuries they may face during frequent use.
Available color: High Visibility Orange
Available lengths: 32", 36", 40"
Available color: Navy Blue
Available lengths: 32", 36", 40"
See it in action!
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SPECIAL OFFER
Camo Glasses
A combination of safety and style, Camo Glasses from STIHL provide 99% UV protection in a sleek, camo-pattern frame. The single lens, wrap-around design offers great protection and an overall modern look. The lenses are made from an optical-grade polycarbonate. Soft rubber temple tips and nosepiece are designed to help maintain fit while reducing slippage.
Meets ANSI Z87+ standard
Available lens colors: Bronze Smoke, Yellow
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SPECIAL OFFER
Pro Mark™ Helmet System
The Pro Mark™ Helmet System is designed to offer premium protection to your most premium asset –your head. The hard hat features a lightweight ABS thermoplastic shell and a six-point ratchet-style suspension system for shock absorption and overall comfort. For hearing protection, we’ve used our NRR 25 earmuffs to help block out tool and engine sound. The visor is a durable steel mesh full-face screen, designed to protect your face from flying debris. And a built-in rain gutter directs rain away from your face during inclement weather.
Meets ANSI standards for earmuffs (ANSI S3.19-1974) and have a Noise ReductionRating (NRR) of 25 dB(A), visor (ANSI Z87.1-2009) and hardhat (ANSI Z89.1:2009).Type 1 Class G
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SPECIAL OFFER
STIHL Pro Mark™ Dynamic Protective Gloves
Power up any STIHL product while wearing STIHL Pro Mark™ Dynamic Gloves. Featuring multiple layers of cut-retardant materials – Avertic™ Pro and Dyneema fabrics by Engtex® – these gloves will help deliver the protection you need while operating your STIHL chainsaw. The palm and inner fingers are made of full-grain tanned leather, so you can work with comfort without sacrificing a firm hold. Accented with an orange rip-stop nylon backing, these dynamic gloves offer style and professional-grade protection. The STIHL Pro Mark™ Dynamic Gloves are water repellant, breathable and feature a Velcro wrist closure to help keep wood chips, snow, ice and other debris from getting inside.
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