MS 661 R MAGNUM®

Name: MS 661 R MAGNUM®
Brand: STIHL
SKU: ms661r
Rating: 5.0000 (9 reviews)

Ask a Question

This wrap-handle chainsaw delivers the professional power and rugged dependability needed to take on tough felling jobs.

Features

MS-Wrap Handle (R)
Ematic™ Lubrication System
STIHL ElastoStart™
HD2 Air Filter

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 previous model, 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!

Features
- MS-Wrap Handle (R) -
  Saw can be used in multiple positions for felling or limbing with hands in the proper positions.
- Ematic™ Lubrication System -
  The Ematic™ guide bar, when used with STIHL OILOMATIC® saw chain, will provide proper lubrication and less oil consumption than conventional methods. The system works because two ramps, strategically placed in the guide bar rail, help contain the flow of oil and direct all lubrication to the sliding faces of the bar and chain links as well as the rivets and driver holes, which in turn can reduce bar oil consumption up to 50%.
- 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.
- 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.
- IntelliCarb™ Compensating Carburetor -
  The IntelliCarb™ Compensating Carburetor is designed to automatically adjust the air/fuel ratio when the air filter becomes restricted or partially clogged and maintains the engine’s correct RPM. IntelliCarb™ uses air from the clean side of the air filter to control the diaphragm and flow of fuel. As the air filter becomes dirty and less air is available for the carburetor, the IntelliCarb™ system adjusts the fuel flow to compensate for the decrease in air flow. This is in contrast to typical carburetors that utilize this air from the “dirty” side of the air box.
- STIHL Quickstop® and a second chain braking system (Q) exclusive to STIHL -
  STIHL Quickstop^® is designed to reduce the risk of injury in certain kickback situations. An additional manually activated chain brake is designed to engage when the operator‘s right hand completely releases the rear handle, stopping the chain within one second.
- Bumper Spikes -
  These spikes prevent pull-in and provide better control, making cutting easier.
- Lightweight Sprocket Cover with Captive Bar Nuts -
  The sprocket cover is lightweight and the captive bar nuts are held securely in place for efficient saw chain maintenance.
- 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.
- 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.
- 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.
- Master Control Lever™ -
  The Master Control Lever™ is an easy to use single lever, operating the choke, starting throttle lock, and on-off switch. The operator must pull the throttle trigger before moving the Master Control Lever™ to the choke position.
- 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.
- 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.
- Throttle Trigger Lock -
  See it in action!

Specifications

Questions And Answers

Reviews

Warnings And Safety
Chainsaw Safety and Maintenance - Video
Product Instruction Manual (PDF)
Product Safety Manual (PDF)
STIHL Limited Warranty
Contact Us

Note: STIHL engine products with the Caring for Nature logo are cleaner than EPA Standards for exhaust emissions.
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.

SERVICE AND TIPS

Operating Instructions

The operating instructions for your STIHL product are available right here 24/7. Please review your instructions carefully and often.

Get Operating Instructions

FAQ

Have a question? We have the answer you need. Browse our most frequently-asked questions and get information right here.

Get Answers In The FAQ

Guides And Projects

Discover projects with step-by-step instructions, find advice and tips related to your product and check out helpful how-tos.

View Guides And Projects

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
INTENDED USE	Professional