Stihl MS 291 Review: The Ultimate Workhorse for Modern Landowners
The Stihl MS 291 occupies a critical niche in the chainsaw market, bridging the gap between occasional-use homeowner tools and high-end professional forestry saws. Designed as part of Stihl Farm and Ranch line, the MS 291 is engineered for users who require high-torque performance for felling, bucking, and firewood processing without the astronomical price tag of a magnesium-crankcase professional unit.
We ran the MS 291 through heavy cutting conditions on real farm and ranch properties to see how this 55.5cc powerhouse performs.
At a Glance: Mid-Range Powerhouse Stand-Off
| Model | Displacement | Power Output | Weight (Powerhead) | Best Use Case |
|---|---|---|---|---|
| Stihl MS 291 | 55.5 cc | 3.76 bhp | 12.3 lbs | Heavy farming and ranching |
| Stihl MS 271 | 50.2 cc | 3.49 bhp | 12.3 lbs | General landscaping |
| Husqvarna 455 | 55.5 cc | 3.50 bhp | 13.2 lbs | All-around firewood |
Stihl MS 291 Review: Performance and Engine Technology
The heart of the Stihl MS 291 is its stratified scavenging engine technology. This system creates a buffer of air between the burnt charge in the combustion chamber and the fresh fuel in the crankcase. The result is a 20% increase in fuel efficiency and a 50% reduction in emissions compared to traditional two-stroke engines.
High-Advantage Filtration
One of the standout technical features is the pre-separation air filtration system. This design uses centrifugal force to eject heavier dirt particles before they reach the air filter. This extends filter life by up to five times compared to standard systems.
Honest Downside
While powerful, the MS 291 is slightly heavier than professional series saws like the MS 261 that offer similar power. It uses a polymer crankcase rather than magnesium, which is standard in the Pro line.
Who It Is Best For
Serious landowners who need professional-grade engine technology and filtration in a package designed for heavy cutting. If you are new to high-powered saws, we recommend reviewing the safety guide before operating a machine of this caliber.
Chainsaw Safety
The MS 291 delivers serious torque that can be dangerous in untrained hands. Always wear full PPE including chaps, helmet with face shield, ear protection, and steel-toed boots.
Never cut above shoulder height. Study our chainsaw safety guide before you start.
Maintenance
The pre-separation air filter and side-access chain tensioner make field adjustments simple. The 2-MIX engine is noticeably more efficient than older 029 or MS 290 models. Toolless fuel and oil caps make refueling quick even with gloves on.
For the right bar and chain, see our stihl-chainsaw-bar-size-guide-match-your-model-to-the-right-bar-chain.
Gas vs Battery
For sustained torque in large-diameter hardwood logs, the MS 291 remains unmatched by current battery technology. Electric options are improving, but when you need to work all day without charging, gas still wins. Read our gas vs electric chainsaw guide.
Final Verdict
The Stihl MS 291 is a prosumer masterpiece. It offers professional-grade engine technology and filtration in a package designed for the serious landowner. While it may be overkill for light branch trimming, it is the perfect tool for felling medium-sized trees and processing several cords of firewood annually.
SAWOFF Rating: 4.6 / 5
Get out there and cut. Safely.
Frequently Asked Questions
Can the Stihl MS 291 run a 20-inch bar?
Yes, the MS 291 is rated for a 20-inch bar. However, for optimal chain speed and balance, most professionals recommend using an 18-inch bar, especially when cutting dense hardwoods.
How does the MS 291 differ from the MS 271?
The MS 291 has a larger displacement (55.5cc vs 50.2cc) and higher horsepower (3.76 bhp vs 3.49 bhp). They share the same chassis and weight, meaning the 291 offers a better power-to-weight ratio.
Does it require a specific fuel mix?
The MS 291 requires a 50:1 mixture of high-quality 89+ octane gasoline and two-stroke air-cooled engine oil. Stihl MotoMix is recommended for long-term engine health and easier starting.
Is the MS 291 a professional chainsaw?
Technically, no. It belongs to the Farm and Ranch category. Professional Stihl saws have a 6 in the middle of the model number (e.g., MS 261) and feature magnesium crankcases for continuous daily use.
What is the weight of the MS 291?
The MS 291 powerhead weighs 12.3 lbs (5.6 kg), the same as the MS 271 but with a larger displacement engine.
Does the MS 291 have an adjustable oiler?
The MS 291 features an adjustable oil pump, allowing you to increase or decrease oil flow depending on bar length and wood conditions.
How does the MS 291 compare to the Husqvarna 455?
Both are 55.5cc class farm saws. The MS 291 offers pre-separation air filtration and stratified scavenging for better fuel efficiency. The Husqvarna 455 is slightly heavier at 13.2 lbs.
What is the fuel capacity of the MS 291?
The MS 291 has a fuel capacity of 500 cc (16.9 oz) and an oil capacity of 240 cc (8.1 oz).
