MS 661 R C-M MAGNUM®

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.

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.

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.

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    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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    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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    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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    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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    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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    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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    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.