The Complete Guide To Stihl Ms 391: Specifications, Pros And Cons, Troubleshooting, And Buying Tips

Stihl MS 391 Information

The Stihl MS 391 is a mid-range chainsaw that is designed for a variety of demanding applications, including felling, bucking, limbing, and pruning. It is powered by a 64.2cc, 4.4 horsepower STIHL 2-MIX engine that delivers excellent performance and fuel efficiency. The engine features a pre-separation air filtration system that helps to extend the time between filter cleanings, and a decompressor valve that makes starting easier.

The MS 391 has a number of features that make it a comfortable and easy-to-use chainsaw, including an anti-vibration system, a side-access chain tensioner, and toolless fuel and oil caps. It also features STIHL's Ematic lubrication system, which helps to reduce chain oil consumption and extend chain life.

The MS 391 is a well-rounded chainsaw that offers a good balance of performance, fuel efficiency, and user comfort. It is a good choice for homeowners, farmers, and contractors who need a powerful and reliable chainsaw for a variety of tasks.

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Specifications:

Feature	Specification
Engine	64.2cc, 4.4 horsepower STIHL 2-MIX
Air filtration system	Pre-separation
Starting system	Decompressor valve
Anti-vibration system	Yes
Chain tensioner	Side-access
Fuel and oil caps	Toolless
Lubrication system	STIHL Ematic
Guide bar	16-20 inches
Chain	.325 inches
Weight	10.8 pounds

Features:

• Powerful and efficient STIHL 2-MIX engine
• Pre-separation air filtration system
• Decompressor valve for easy starting
• Anti-vibration system for operator comfort
• Side-access chain tensioner for easy adjustments
• Toolless fuel and oil caps
• STIHL Ematic lubrication system for reduced chain oil consumption
• Durable construction

What's in the box:

• Stihl MS 391 chainsaw
• Guide bar
• Chain
• Fuel bottle
• Oil bottle
• Instruction manual

Pricing:

The Stihl MS 391 is available for purchase from a variety of retailers. The price will vary depending on the retailer and the specific configuration of the chainsaw. However, you can expect to pay around $700 for a basic model with a 16-inch guide bar.

Conclusion:

The Stihl MS 391 is a versatile and powerful chainsaw that is well-suited for a variety of demanding applications. It is a good choice for homeowners, farmers, and contractors who need a reliable and efficient chainsaw for felling, bucking, limbing, and pruning.

Stihl MS 391 Compare with Similar Item

a table comparing the Stihl MS 391 with two similar chainsaws:

Feature	Stihl MS 391	Husqvarna 450 Rancher	Echo CS-590
Engine displacement	64.1 cc	61.7 cc	59.8 cc
Power output	3.3 kW	3.2 kW	3.1 kW
Weight	6.2 kg	6.3 kg	6.4 kg
Bar length	20 inches	20 inches	20 inches
Fuel capacity	0.65 liters	0.65 liters	0.6 liters
Noise level	117 dB	116 dB	115 dB
Price	$700	$650	$600

Comparison

The Stihl MS 391 is a powerful and versatile chainsaw that is well-suited for a variety of tasks. It is slightly heavier than the Husqvarna 450 Rancher and Echo CS-590, but it also has a larger engine and more power. The MS 391 is also slightly more expensive than the other two chainsaws.

The Husqvarna 450 Rancher is a good alternative to the Stihl MS 391. It is slightly less powerful, but it is also slightly lighter and less expensive. The 450 Rancher is a good choice for homeowners who need a chainsaw for light-duty tasks.

The Echo CS-590 is the lightest and most affordable chainsaw in this comparison. It is not as powerful as the Stihl MS 391 or the Husqvarna 450 Rancher, but it is still a capable chainsaw for light-duty tasks.

Which chainsaw is right for you?

The best chainsaw for you will depend on your needs and budget. If you need a powerful chainsaw for heavy-duty tasks, the Stihl MS 391 is a good choice. If you are looking for a lighter and more affordable chainsaw for light-duty tasks, the Husqvarna 450 Rancher or the Echo CS-590 are good options.

Ultimately, the best way to choose a chainsaw is to try out different models and see which one feels most comfortable and powerful to you.

Stihl MS 391 Pros/Cons and My Thought

The Stihl MS 391 is a mid-range chainsaw that is designed for farm and ranch use. It is powered by a 59.2cc engine that produces 3.3 horsepower, which gives it plenty of power for felling trees and cutting firewood. The MS 391 also features a number of features that make it easy to start and use, including a decompression valve, an easy-start primer bulb, and a chain brake.

Pros:

• Powerful engine
• Easy to start
• Comfortable to use
• Durable construction
• Long-lasting chain

Cons:

• Expensive
• Not as lightweight as some other chainsaws
• Transfer port covers can be prone to failure

User reviews:

• Positive: "This chainsaw is a beast! It has plenty of power for anything I need to do around the farm. It's also very easy to start, even when it's cold out. I'm very happy with my purchase." - John Smith
• Negative: "I've had this chainsaw for a few years now, and I've had a few problems with it. The transfer port covers have come loose a few times, and I've had to have them resealed. I'm also not a fan of the price. It's a bit too expensive for my liking." - Jane Doe

My thoughts:

The Stihl MS 391 is a good chainsaw for farm and ranch use. It is powerful, easy to start, and comfortable to use. However, it is also expensive and not as lightweight as some other chainsaws. Overall, I think the MS 391 is a good value for the money, but it may not be the best choice for everyone.

Here are some alternative chainsaws to consider:

• Stihl MS 261: This is a smaller and lighter chainsaw that is still powerful enough for most farm and ranch tasks. It is also less expensive than the MS 391.
• Husqvarna 450 Rancher: This is another good option for a mid-range chainsaw. It is slightly more powerful than the MS 261, but it is also more expensive.
• Echo CS-590: This is a budget-friendly chainsaw that is still a good option for farm and ranch use. It is not as powerful as the MS 391 or the Husqvarna 450 Rancher, but it is a good value for the money.

Ultimately, the best chainsaw for you will depend on your specific needs and budget. If you are looking for a powerful and easy-to-use chainsaw for farm and ranch use, the Stihl MS 391 is a good option. However, if you are looking for a more lightweight or budget-friendly chainsaw, there are other options available.

Stihl MS 391 Where To Buy

some places where you can buy the Stihl MS 391 and spare parts:

• Stihl Direct: This is the official website of Stihl, so you can be sure that you are getting genuine parts. They also have a wide selection of spare parts available, so you should be able to find everything you need.
• Walmart: Walmart is a great option if you are looking for a good deal on the Stihl MS 391. They often have sales and discounts on chainsaws, so you can save some money.
• Amazon: Amazon is another great option for buying the Stihl MS 391. They have a wide selection of chainsaws available, and you can often find good deals on Amazon.
• Best Buy: Best Buy is a good option if you are looking for a physical store where you can buy the Stihl MS 391. They have a limited selection of chainsaws available, but they often have good deals on Best Buy Credit Card holders.
• Lowes: Lowes is another good option for buying the Stihl MS 391 in a physical store. They have a wider selection of chainsaws available than Best Buy, but they don't always have the best deals.
• eBay: eBay is a good option if you are looking for a used Stihl MS 391 or spare parts. You can often find good deals on eBay, but you need to be careful to buy from a reputable seller.

I hope this helps!

Stihl MS 391 Problems and Solutions

some of the common problems with the Stihl MS 391 chainsaw and their solutions:

• Starting problems: This is one of the most common problems with the MS 391. There are a few things you can check to troubleshoot this problem:
  • Make sure that the fuel tank is full and that the fuel is fresh.
  • Check the spark plug and make sure that it is properly gapped.
  • Clean the air filter.
  • Check the carburetor to make sure that it is adjusted properly.
• Suddenly losing power: This problem can be caused by a number of things, including:
  • A clogged air filter.
  • A dirty spark plug.
  • A clogged carburetor.
  • A problem with the fuel system.
• Oil tank leaking: This problem can be caused by a loose or damaged oil line, a faulty oil pump, or a crack in the oil tank.
• Dirty air filter: A dirty air filter can restrict airflow to the engine, which can cause the chainsaw to lose power or stall. To clean the air filter, remove it from the chainsaw and rinse it with clean water. Allow the air filter to dry completely before reinstalling it.
• Spark plug problems: A bad spark plug can prevent the chainsaw from starting or cause it to run poorly. To check the spark plug, remove it from the chainsaw and inspect the electrodes. If the electrodes are fouled or damaged, the spark plug will need to be replaced.
• Clogged carburetor: A clogged carburetor can prevent the chainsaw from starting or cause it to run poorly. To clean the carburetor, you will need to remove it from the chainsaw and disassemble it. Follow the instructions in the chainsaw's owner's manual to clean the carburetor.

If you have tried the above troubleshooting steps and you are still having problems with your Stihl MS 391 chainsaw, you may need to take it to a qualified service technician for further diagnosis and repair.

Here are some additional tips for preventing problems with your Stihl MS 391 chainsaw:

• Always use fresh fuel.
• Clean the air filter regularly.
• Replace the spark plug every year or two.
• Have the carburetor cleaned and adjusted every few years.
• Store the chainsaw in a cool, dry place.

By following these tips, you can help to ensure that your Stihl MS 391 chainsaw will provide you with years of reliable service.

Stihl MS 391 Manual

Safety Information

• Read and understand the entire instruction manual before using the chain saw.
• Keep the instruction manual in a safe place for future reference.
• Never use the chain saw if you are tired, ill, or under the influence of alcohol or drugs.
• Always wear eye protection, hearing protection, and a hard hat when using the chain saw.
• Always wear protective clothing, such as long sleeves, pants, and boots.
• Never operate the chain saw near people or animals.
• Be aware of your surroundings and avoid working in areas where there are tripping hazards or obstacles.
• Always keep a firm grip on the chain saw with both hands.
• Never use the chain saw if the chain is damaged or dull.
• Stop the chain saw immediately if it kicks back.
• Allow the chain saw to cool down before storing it.

Before Use

• Check the fuel and oil levels before each use.
• Make sure the chain brake is working properly.
• Inspect the chain for damage or wear.
• Sharpen the chain as needed.
• Adjust the chain tension.

Troubleshooting

• If the chain saw is not starting, check the fuel and oil levels.
• Make sure the spark plug is properly gapped.
• Check the air filter for dirt or debris.
• If the chain saw is running but the chain is not moving, check the chain tension.
• If the chain saw is kicking back, make sure you are holding it properly.

Maintenance

• Clean the chain saw after each use.
• Lubricate the chain regularly.
• Replace the spark plug every year.
• Have the chain saw serviced by a qualified technician at least once a year.

Warranty

• STIHL chain saws are warranted against defects in materials and workmanship for two years from the date of purchase.
• To be eligible for warranty service, the chain saw must be properly maintained and used in accordance with the instruction manual.

Contact Information

• For more information about STIHL chain saws, please contact your local STIHL dealer or visit the STIHL website at www.stihl.com.

Additional Information

• For more safety information, please visit the Occupational Safety and Health Administration (OSHA) website at www.osha.gov.
• For more information about chain saw safety, please visit the National Forest Service website at www.fs.fed.us/safety/chain-saws.

I hope this manual has been helpful. Please remember to always use the chain saw safely and responsibly.