What Size Chain Does a Stihl Ms 391 Take? We Have The Answer!

What Size Chain Does a Stihl Ms 391 Take? We Have The Answer!

The Stihl MS 391 chainsaw is a true force to be reckoned with in the world of chainsaws, but you already know this since you own one. However, if you’re reading this blog post, odds are you are looking for the correct chain for your Stihl MS391.

Have no fear. We have the answer.

The Stihl MS 391 chainsaw typically comes with a factory-standard chain of 3/8-inch pitch, 0.050-inch gauge, and 72 drive links and fits a 20″ guide bar.

You can find the chain for a Stihl MS 391 HERE ON AMAZON

Safety Note: The correct chain is crucial and not only ensures optimal performance but also guarantees safety during use.

Chain Specifications for Stihl MS 391

When it comes to the stihl ms391 chain size, there are specific details to note:

  • Recommended Guide Bar Length: Predominantly, a 20-inch bar is recommended. However, there’s also a stihl ms 391 25-inch bar for sale for those who require a longer reach.
  • OILOMATIC® Chain: The chainsaw uses a 3/8″ RS3 chain, ensuring smooth and efficient cutting.
  • Various Chain Options:
    • 16 in. Bar: STIHL RAPID™ Super with 3/8″ pitch, 0.050″ gauge, and 60 drive links (often referred to as 33 RS3 60).
    • 18 in. Bar: Similar specifications as the 16-inch but also known as “ms391 chain size” for this length.
    • 20 in. Bar: Comes with STIHL RAPID™ Super 3/8″ pitch, 0.050″ gauge, and 72 drive links (33 RS3 72).
Chain Specifications for Stihl MS 391
Recommended Guide Bar Length:
20-inch bar (Standard)
25-inch bar available for longer reach
3/8″ RS3 chain for smooth cutting
Various Chain Options:
16 in. Bar: 3/8″ pitch, 0.050″ gauge, 60 drive links (33 RS3 60). 18 in. Bar: Similar to 16-inch (MS391 chain size). 20 in. Bar: 3/8″ pitch, 0.050″ gauge, 72 drive links (33 RS3 72).
Chain Specs for Stihl MS 391

Stihl MS 391 Chainsaw Specifications

Man cutting log with Stihl chainsaw.

STIHL MS 391 Chainsaw Specifications:

The STIHL MS 391 is a mid-range chainsaw with an anti-vibration system and reduced-emission engine technology. It offers low fuel consumption, longer run times, and reduced emissions. Though it has the same weight as the MS 311, the MS 391 is more powerful. It’s designed for tasks like felling trees, cutting firewood, and post-storm cleanup.

  • Power Source: Gasoline
  • Powerhead Weight: 13.67 lbs.
  • Recommended Guide Bar Length: 20 inches
  • OILOMATIC® Chain: 3/8″ RS3
  • Chain Oil Capacity: 11.8 oz.
  • Engine Power: 4.4 bhp
  • Fuel Capacity: 20.3 oz.
  • Displacement: 64.1 cc

Note: STIHL recommends the #3624 (33 RS3 72) OILOMATIC® saw chain and 20″ 3003 008 8921 Ematic™ guide bar combination. The chainsaw is compatible with guide bar ranges from 16″ to 20″.

For more detailed specifications and other information, it’s always best to refer directly to the manufacturer’s website or consult with a STIHL dealer.

Importance of Using the Right Chain Size

Choosing the correct “stihl ms391 bar and chain” is not just about ensuring your chainsaw works efficiently; it’s also about safety.

  • Performance Impact: Using the right chain size, like the “stihl ms 391 chain”, ensures that the chainsaw operates at its peak performance. It cuts smoothly, reducing the chances of kickbacks and ensuring a clean cut.
  • Safety Implications: An incorrect chain can lead to accidents. The chain might get stuck or cause the chainsaw to behave unpredictably. Always ensure you’re using the recommended “ms391 chain size” for safety.

Wrapping Up – Stihl MS391 Chain Size

The Stihl MS 391 is a remarkable chainsaw, but like all tools, its efficiency and safety lie in using it correctly. Always ensure you have the right “stihl ms391 chain size” and refer to the manufacturer’s specifications and guidelines. Whether you’re a professional or a DIY enthusiast, always prioritize safety and efficiency by choosing the right chain.


FAQs – Stihl MS 391Chainsaw

FAQs - Stihl MS 391 Chainsaw

What size chain is on a STIHL 391?

The Stihl MS 391 typically uses a 3/8″ RS3 OILOMATIC® chain. However, the exact size can vary based on the length of the bar you’re using. For instance, a 20-inch bar would use a chain with 72 drive links.

What size file for STIHL 391?

For sharpening the 3/8″ chain on a Stihl MS 391, you would typically use a 5.2mm (13/64-inch) round file.

What size chain for STIHL ms390?

The Stihl MS 390 also typically uses a 3/8″ pitch chain. The exact size, like the MS 391, will depend on the bar length.

Can you put a 25-inch bar on a Stihl MS 391?

Yes, you can use a 25-inch bar on a Stihl MS 391. In fact, there’s a specific “stihl ms 391 25-inch bar for sale” for those who require a longer reach.

What is the gas mixture for a STIHL MS 391?

The recommended gas mixture for the Stihl MS 391 is a 50:1 ratio of gasoline to two-cycle engine oil.

Can I put a 20 bar on my STIHL chainsaw?

Yes, a 20-inch bar is one of the common sizes used on many Stihl chainsaws, including the MS 391.

What does 20 mean on chainsaw chain?

The “20” typically refers to the length of the chainsaw bar in inches. So, a 20-inch bar would require a chain that fits that length.

Can you use an Oregon bar on a Stihl chainsaw?

Yes, Oregon manufactures bars that are compatible with Stihl chainsaws. However, always ensure the bar specifications match your chainsaw model and intended use.

What is the biggest chainsaw bar Stihl makes?

Stihl manufactures chainsaw bars up to 59 inches in length for their professional series. However, the appropriate bar length will depend on the specific chainsaw model and its power capacity. Always refer to the manufacturer’s recommendations.

Steven R

I have been part of the chainsaw and outdoor power equipment business in one way or the other for over 35 years. There are not many things that I have not seen in the business. From repairs, sales, equipment operation, and safety I can help you with your questions.

Recent Posts