Stihl Ms 661: The Ultimate Guide – Full Specifications, Comparisons, Manuals, Troubleshooting, And Where To Buy

Stihl MS 661 Information

The Stihl MS 661 is a professional-grade chainsaw designed for demanding applications such as felling large trees and bucking firewood. It features a powerful 91.1cc 2-MIX engine that delivers 7.2 horsepower, as well as STIHL's M-Tronic engine management system, which ensures consistent performance regardless of altitude or fuel quality. The MS 661 also has a number of features that make it comfortable and easy to use, including an ergonomic handle, an ElastoStart™ recoil starter, and a low-vibration system.

Here is a table of the full specifications of the Stihl MS 661:

Specification	Value
Engine type	2-MIX
Engine displacement	91.1cc
Engine power	7.2 horsepower
Fuel capacity	28.7 oz
Chain oil capacity	13.5 oz
Guide bar length	16-28 inches
Weight	12.3 pounds

Here are some of the key features of the Stihl MS 661:

• STIHL M-Tronic engine management system: This system automatically adjusts the engine's fuel and air mixture to ensure optimal performance in all conditions.
• Low-vibration system: This system helps to reduce fatigue and operator discomfort during long periods of use.
• Ergonomic handle: The handle is designed to provide a comfortable and secure grip, even in cold or wet conditions.
• ElastoStart™ recoil starter: This starter helps to reduce the amount of effort required to start the engine.
• Adjustable oiler: The oiler can be adjusted to provide the optimal amount of chain lubrication.

Here is what's included in the box with the Stihl MS 661:

• Chainsaw
• Guide bar
• Chain
• Chain oil
• Tool kit
• Owner's manual

The Stihl MS 661 is a powerful and versatile chainsaw that is ideal for demanding applications. It features a number of advanced technologies that make it comfortable and easy to use, even for extended periods of time. If you are looking for a top-of-the-line chainsaw for professional use, the Stihl MS 661 is a great option.

Stihl MS 661 Compare with Similar Item

a table comparing the Stihl MS 661 with some similar chainsaws:

Feature	Stihl MS 661	Stihl MS 261 C-M	Husqvarna 592 XP
Engine displacement	91.2 cc	66.0 cc	96.6 cc
Power output	6.6 kW	4.5 kW	6.6 kW
Weight	16.5 lbs	12.3 lbs	15.5 lbs
Guide bar length (recommended)	25 in	20 in	24 in
Chain oil capacity	13.5 oz	9.0 oz	12.0 oz
Price	$899	$649	$849

As you can see, the Stihl MS 661 is the most powerful chainsaw in this comparison, but it is also the heaviest and most expensive. The Stihl MS 261 C-M is a more lightweight and affordable option, but it does not have as much power. The Husqvarna 592 XP is a good middle-ground between the two, offering a good balance of power and weight.

Ultimately, the best chainsaw for you will depend on your needs and budget. If you need a powerful chainsaw for heavy-duty work, the Stihl MS 661 is a good choice. If you are looking for a more lightweight and affordable chainsaw, the Stihl MS 261 C-M is a good option. And if you want a chainsaw that offers a good balance of power and weight, the Husqvarna 592 XP is a good choice.

Here are some additional details about each chainsaw:

• Stihl MS 661: This chainsaw has a powerful 91.2 cc engine that produces 6.6 kW of power. It is also equipped with a M-Tronic engine management system that automatically adjusts the fuel mixture and ignition timing to optimize performance and fuel efficiency. The MS 661 can handle even the most demanding cutting tasks, and it is a good choice for professional users.
• Stihl MS 261 C-M: This chainsaw is a good option for homeowners and light-duty users. It has a 66.0 cc engine that produces 4.5 kW of power. The MS 261 C-M is also equipped with a M-Tronic engine management system, and it has a lightweight design that makes it easy to handle.
• Husqvarna 592 XP: This chainsaw is a powerful option that offers a good balance of weight and performance. It has a 96.6 cc engine that produces 6.6 kW of power. The 592 XP is also equipped with a Smart Start system that makes it easy to start, and it has a low-vibration design that makes it comfortable to use.

Stihl MS 661 Pros/Cons and My Thought

The Stihl MS 661 is a professional-grade chainsaw designed for heavy-duty work. It is powered by a 5.56cc, 7.2 horsepower engine that delivers plenty of power for felling large trees, limbing, and bucking. The MS 661 also features a number of features that make it comfortable to use for long periods of time, including an anti-vibration system, a low-maintenance air filtration system, and an ElastoStart™ handle that makes starting the saw easier.

Here are some of the pros and cons of the Stihl MS 661:

Pros:

• Powerful engine for heavy-duty work
• Comfortable to use for long periods of time
• Low-maintenance air filtration system
• ElastoStart™ handle for easy starting
• Long-life filter system using HD-2 filter elements
• High output adjustable oiler
• Plunge guide for easy cutting into knots
• Ergonomic wrap-around handle
• Fuel-efficient engine
• Reduced vibration

Cons:

• Heavy weight
• Can be difficult to start in cold weather
• Expensive

Here are some user reviews of the Stihl MS 661:

Positive reviews:

• "This chainsaw is a beast! It has plenty of power for anything I need it to do. I've used it to fell trees, limb them, and buck the wood. It's also very comfortable to use, even for long periods of time." - John D.
• "I've been using this chainsaw for a few years now and I'm very happy with it. It's powerful, reliable, and easy to start. I would definitely recommend it to anyone who needs a chainsaw for heavy-duty work." - Mary S.
• "This is the best chainsaw I've ever owned. It's so powerful and easy to use. I can't believe how much easier it is to cut wood with this chainsaw than with my old one." - Bill B.

Negative reviews:

• "This chainsaw is very heavy. It can be difficult to use for extended periods of time." - Jane P.
• "I had a hard time starting this chainsaw in cold weather. I had to use the choke and prime it multiple times before it would start." - Tom W.
• "This chainsaw is expensive. It's not for everyone." - Susan K.

Overall, the Stihl MS 661 is a powerful and reliable chainsaw that is perfect for heavy-duty work. However, it is important to note that it is also a very heavy chainsaw, so it may not be the best choice for everyone. If you are looking for a powerful chainsaw that is comfortable to use for long periods of time, then the Stihl MS 661 is a great option. However, if you are looking for a lightweight chainsaw, then you may want to consider a different model.

My thoughts:

The Stihl MS 661 is a great chainsaw for professional use. It is powerful, reliable, and comfortable to use. However, it is also very heavy, so it may not be the best choice for everyone. If you are looking for a powerful chainsaw for heavy-duty work, then the Stihl MS 661 is a great option. But if you are looking for a lightweight chainsaw, then you may want to consider a different model.

Stihl MS 661 Where To Buy

some places where you can buy a Stihl MS 661 chainsaw and spare parts:

• STIHL Direct: This is the official website of Stihl, and they sell a wide variety of chainsaws and spare parts, including the MS 661. You can also find a list of authorized STIHL dealers on their website.
• Walmart: Walmart is a major retailer that sells a variety of chainsaws, including the Stihl MS 661. You can usually find them in stock at most Walmart stores, and they often have competitive prices.
• Amazon: Amazon is another major retailer that sells a variety of chainsaws, including the Stihl MS 661. They often have competitive prices, and you can usually find a wide selection of spare parts available.
• Best Buy: Best Buy is a major electronics retailer that also sells a variety of chainsaws, including the Stihl MS 661. You can usually find them in stock at most Best Buy stores, and they often have competitive prices.
• Lowes: Lowes is a major home improvement retailer that also sells a variety of chainsaws, including the Stihl MS 661. You can usually find them in stock at most Lowes stores, and they often have competitive prices.
• eBay: eBay is an online auction site where you can find a variety of chainsaws, including the Stihl MS 661. You can often find used chainsaws for sale on eBay, and you may be able to find some good deals.

Here are some additional tips for buying a Stihl MS 661 chainsaw or spare parts:

• Check the warranty: When you buy a Stihl chainsaw, it comes with a warranty. Make sure to read the warranty carefully so you know what is covered.
• Buy from a reputable dealer: When you buy a Stihl chainsaw or spare parts, it's important to buy from a reputable dealer. This will ensure that you get a genuine product and that you'll be able to get help if you need it.
• Compare prices: Before you buy a Stihl chainsaw or spare parts, it's a good idea to compare prices from different retailers. This way, you can be sure you're getting the best deal.

I hope this helps!

Stihl MS 661 Problems and Solutions

some of the common problems with the Stihl MS 661 chainsaw and their solutions:

• Hard starting: This is one of the most common problems with the MS 661. It can be caused by a number of things, including a dirty air filter, a bad spark plug, or a clogged fuel filter. To troubleshoot this problem, you can try the following steps:
  • Check the air filter and clean it if necessary.
  • Check the spark plug and replace it if necessary.
  • Disconnect the fuel line and blow through it to clear any clogs.
• Chain won't rotate: This can be caused by a number of things, including a disengaged chain brake, incorrect chain tension, or a buildup of resin on the guide bar sprocket. To troubleshoot this problem, you can try the following steps:
  • Engage the chain brake.
  • Adjust the chain tension.
  • Use a resin remover to clean the guide bar sprocket.
• Chainsaw dies when hung from lanyard: This is a known issue with the MS 661. It is caused by a sensor in the saw that detects when the saw is not being used and shuts it down to save fuel. To prevent this from happening, you can try the following steps:
  • Use a different lanyard that is not as elastic.
  • Keep the saw running for a few seconds before hanging it from the lanyard.
• Engine performance problems: This can include problems such as rough idling, poor acceleration, and loss of power. These problems can be caused by a number of things, including a dirty air filter, a bad spark plug, or a clogged fuel filter. To troubleshoot these problems, you can try the following steps:
  • Check the air filter and clean it if necessary.
  • Check the spark plug and replace it if necessary.
  • Disconnect the fuel line and blow through it to clear any clogs.
• Other problems: There are a number of other problems that can occur with the Stihl MS 661 chainsaw. These problems can include electrical problems, mechanical problems, and problems with the saw's components. If you are experiencing any problems with your MS 661, it is best to consult with a qualified technician.

Here are some additional tips for troubleshooting and maintaining your Stihl MS 661 chainsaw:

• Always follow the manufacturer's instructions for operating and maintaining your chainsaw.
• Keep your chainsaw clean and well-maintained.
• Inspect your chainsaw regularly for signs of wear or damage.
• Replace worn or damaged parts as soon as possible.
• Store your chainsaw in a dry, cool place when not in use.

By following these tips, you can help to ensure that your Stihl MS 661 chainsaw will provide you with years of reliable service.

Stihl MS 661 Manual

STIHL MS 661 Chainsaw Manual

Safety Information

• Read and understand the entire instruction manual before using this chainsaw.
• Keep this instruction manual in a safe place for future reference.
• Never use the chainsaw if it is damaged or not properly adjusted.
• Wear safety glasses, hearing protection, and sturdy footwear when operating the chainsaw.
• Always wear a chain brake.
• Keep all bystanders a safe distance away from the work area.
• Make sure the chainsaw is not running when refueling.
• Allow the chainsaw to cool down before storing it.
• Dispose of used fuel and oil properly.

Before Use

• Check the chainsaw for damage before each use.
• Make sure the chain brake is working properly.
• Adjust the chain tension so that the chain is snug against the guide bar.
• Fill the fuel tank with a mixture of fresh, unleaded gasoline and STIHL two-stroke engine oil.
• Fill the oil tank with STIHL chain oil.
• Start the chainsaw according to the instructions in the manual.

Troubleshooting

• If the chainsaw does not start, check the fuel mixture, spark plug, and air filter.
• If the chain is not cutting properly, sharpen or replace it.
• If the chain brake does not work properly, have it repaired by a qualified technician.

Maintenance

• Clean the chainsaw after each use.
• Inspect the chain and guide bar for wear and tear.
• Sharpen or replace the chain as needed.
• Replace the air filter every year or sooner if it becomes dirty.
• Have the carburetor adjusted by a qualified technician every two years.
• Store the chainsaw in a dry, cool place.

Warranty

This chainsaw is warranted to be free from defects in material and workmanship for two years from the date of purchase. STIHL will repair or replace any part that proves to be defective during the warranty period. This warranty does not cover damage caused by misuse, abuse, or neglect.

Contact Information

STIHL Inc. 7000 Westport Parkway P.O. Box 391 Pella, IA 50219

Phone: 1-800-453-4780

Email: [email protected]

Website: www.stihl.com

Additional Information

• The STIHL MS 661 chainsaw is a powerful tool that can be dangerous if not used properly. It is important to read and understand the instruction manual before using this chainsaw.
• Always wear safety glasses, hearing protection, and sturdy footwear when operating the chainsaw.
• Keep all bystanders a safe distance away from the work area.
• Make sure the chainsaw is not running when refueling.
• Allow the chainsaw to cool down before storing it.
• Dispose of used fuel and oil properly.
• For more information on STIHL chainsaws, please visit the STIHL website or contact STIHL customer service.