STIHL MS 291 Gas Chainsaw – 18" & 20" Bar Options

The STIHL MS 291 Gas Chainsaw is a powerful mid-range saw designed for frequent firewood cutting, farm and ranch work, property maintenance, construction, and other demanding cutting jobs. Its 55.5 cc engine produces 3.8 bhp, while STIHL's pre-separation air filtration system, anti-vibration system, side-access chain tensioner, and practical operating controls help make the MS 291 easier to maintain and comfortable to use.

This listing offers the STIHL MS 291 with your choice of an 18-inch or 20-inch guide bar configuration. Select the desired bar-length variant before adding the saw to your cart.

California Notice: This product is not available for purchase or delivery in California.

STIHL MS 291 18" & 20" Chainsaw Options

This MS 291 product page gives you two bar-length configurations to choose from:

Select the desired bar length from the available product variants before ordering.

STIHL MS 291 Specifications

Actual cutting length is shorter than the nominal guide-bar length. System weight varies with the selected bar and chain configuration.

Powerful Chainsaw for Firewood, Farm & Property Work

The STIHL MS 291 is designed for frequent use where a smaller homeowner saw may not provide enough cutting performance.

Typical applications include:

• Cutting and processing firewood
• Felling trees
• Bucking logs
• Farm and ranch maintenance
• Storm cleanup
• Property maintenance
• Agricultural work
• Construction and timber work

Its 55.5 cc engine provides the power needed for substantial cutting work while retaining a manageable powerhead weight.

18-Inch STIHL MS 291

The 18-inch MS 291 configuration is a versatile setup for firewood cutting, property maintenance, farm work, storm cleanup, and general-purpose chainsaw use.

For customers who want a balance of cutting capacity and maneuverability, the 18-inch configuration is an excellent all-around option.

20-Inch STIHL MS 291

The 20-inch STIHL MS 291 configuration provides additional guide-bar length for larger cutting jobs while using the same 55.5 cc MS 291 powerhead.

If you are specifically shopping for a STIHL MS 291 20-inch chainsaw, choose the 20-inch variant on this page.

Pre-Separation Air Filtration System

The MS 291 uses STIHL's pre-separation air filtration system to remove larger dirt particles from incoming air before they reach the main air filter.

Centrifugal force separates heavier particles first, reducing the amount of debris that the filter has to capture. This helps extend service intervals and reduces the frequency of air-filter cleaning.

STIHL Anti-Vibration System

The STIHL anti-vibration system is designed to reduce the amount of engine and cutting-system vibration transferred to the operator.

This can make a meaningful difference during longer firewood, farm, ranch, and property-maintenance jobs.

Side-Access Chain Tensioner

The side-access chain tensioner places the adjustment point in a convenient position on the side of the saw, making it easier to adjust chain tension with the appropriate bar wrench.

Toolless Fuel & Oil Caps

The MS 291 features toolless fuel and chain-oil caps with retainers. Lift and turn the cap to open or close it without needing a separate tool.

Master Control Lever™

The Master Control Lever™ combines important chainsaw operating functions into a single control, including choke, starting throttle lock, and engine on/off functions.

Bumper Spikes

Bumper spikes help provide leverage and additional control when making larger cuts, helping hold the saw securely against the wood during operation.

STIHL MS 291 Price & Availability

If you are comparing the STIHL MS 291 price or searching for a STIHL MS 291 for sale, use the current price and inventory shown directly on this product page.

Pricing may vary between the 18-inch and 20-inch configurations, so select the desired bar length to see the applicable product option.

STIHL MS 291 Chain & Cutting System

The MS 291 uses a .325-inch saw-chain pitch.

STIHL's supplied specifications identify the 18-inch configuration with an applicable .325" cutting system. Always match the replacement chain and guide bar to the exact bar configuration on your saw.

Popular STIHL MS 291 Parts

Keeping common maintenance and repair parts available can help keep an MS 291 working season after season.

• STIHL MS 291 Tune-Up Kit
• STIHL MS 291 Spark Arrestor Screen
• STIHL MS 291 Chain Tensioner Kit

STIHL MS 291 Instruction Manual

For complete operating, starting, safety, maintenance, and service information, refer to the official instruction manual:

STIHL MS 271 / MS 291 Instruction Manual

Eligible STIHL Warranty Extension

Eligible STIHL gasoline-powered equipment purchased for personal, non-income-producing household use may qualify for extended limited-warranty protection when qualifying STIHL fuel or oil products are purchased at the same time.

One qualifying option is a six-pack of STIHL HP Ultra Oil. Eligibility and restrictions apply; review the applicable STIHL warranty terms for complete details.

View STIHL Warranty and Shipping Policy

Frequently Asked Questions

What size engine does the STIHL MS 291 have?

The STIHL MS 291 has a 55.5 cc gas engine rated at approximately 3.8 bhp.

How much does a STIHL MS 291 weigh?

The powerhead weighs approximately 12.4 lb. without fuel, guide bar, or saw chain. Total system weight depends on the selected bar and chain configuration.

What bar lengths are available on this MS 291 listing?

This product page offers the STIHL MS 291 with either an 18-inch or 20-inch guide bar.

Can I buy the STIHL MS 291 with a 20-inch bar?

Yes. A 20-inch MS 291 configuration is available as a selectable variant on this listing.

Can I buy an MS 291 with an 18-inch bar?

Yes. This listing also offers an 18-inch STIHL MS 291 configuration.

What chain pitch does the STIHL MS 291 use?

The STIHL MS 291 uses a .325-inch saw-chain pitch. Match the replacement chain to the exact guide-bar configuration installed on your saw.

What is the STIHL MS 291 used for?

The MS 291 is designed for frequent cutting applications such as firewood processing, farm and ranch work, property maintenance, agriculture, construction, felling, and storm cleanup.

Is the STIHL MS 291 a Farm Boss?

Some shoppers search for the MS 291 using “Farm Boss 291” terminology. This listing is for the STIHL MS 291; refer to the current STIHL model designation and specifications shown on this page when comparing saws.

What are the STIHL MS 291 specs?

Key specifications include a 55.5 cc engine, 3.8 bhp output, approximately 12.4 lb. powerhead weight, .325" saw-chain pitch, and 18" or 20" bar options on this listing.

How do I start a STIHL MS 291?

Follow the starting procedure in the official STIHL MS 271 / MS 291 instruction manual linked above. The saw uses a Master Control Lever™ that combines several starting and operating functions.

How much is a STIHL MS 291?

Check the current price displayed on this product page. Pricing can differ between the 18-inch and 20-inch variants.

Can the STIHL MS 291 be purchased or delivered in California?

No. This product is listed as not available for purchase or delivery in California.

STIHL MS 291 Gas Chainsaw for Sale

Choose the STIHL MS 291 when you need a durable gas chainsaw for firewood, farm and ranch work, construction, storm cleanup, and demanding property maintenance. Select either the 18-inch or 20-inch bar configuration available on this page to match the saw to your cutting needs.