Stihl Ms 251 chainsaw

Stihl MS 251

Built for serious firewood cutting and heavy-duty homeowner tasks, this German-engineered chainsaw combines professional-grade performance with user-friendly operation. Its robust 45.9cc engine generates 3 horsepower, providing ample cutting power for demanding woodland work while maintaining the reliability Stihl has delivered since 1926. Weighing 4.8 kg without bar and chain, the MS 251 strikes an optimal balance between power and maneuverability. The recommended 45.7cm bar length with 0.325-inch chain pitch makes it versatile enough for both felling medium-sized trees and processing firewood efficiently. This chainsaw represents the perfect middle ground for homeowners who need more than occasional light cutting but don't require full commercial-grade equipment.

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45.9 cc
Engine Displacement
2.2 kW
Power Output
45.7 cm
Recommended Bar Length
4.8 kg
Weight (without bar and chain)
Heavy-duty gas chainsaw for harvesting firewood in the woods For homeowners and light duty work
Intended Use
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Technical Specifications

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Engine
Engine Displacement 45.9 cc
Power Output 2.2 kW
Power Output (HP) 3 hp
Cutting
Recommended Bar Length 45.7 cm
Chain Pitch 0.325 "
Weight
Weight (without bar and chain) 4.8 kg
Classification
Intended Use Heavy-duty gas chainsaw for harvesting firewood in the woods For homeowners and light duty work
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Also sold as Wood Boss

Frequently asked questions

What is the Stihl MS 251 best suited for?

Stihl positions the MS 251 as a heavy-duty petrol saw for harvesting firewood in the woods, and for homeowners doing light-duty work. Its 45.9 cc engine and 45.7 cm bar cover felling smaller trees, bucking logs and clearing storm damage, which is more saw than occasional garden pruning calls for.

How much power does the Stihl MS 251 produce?

The Stihl MS 251 produces 2.2 kW, or 3 hp, from a 45.9 cc petrol engine. That puts it in the mid-size class: enough to pull the recommended 45.7 cm bar through hardwood at a steady pace for firewood work, without the bulk of a full professional felling saw.

What bar length does the Stihl MS 251 use?

The recommended bar length for the Stihl MS 251 is 45.7 cm, the metric equivalent of an 18 inch bar. That reach handles trunks well over 30 cm across from one side and covers most firewood cutting. No maximum bar length is published for the MS 251 in the specifications ChainsawData records.

How much does the Stihl MS 251 weigh?

The Stihl MS 251 weighs 4.8 kg without bar and chain. Add the 45.7 cm bar, a chain, fuel and bar oil and the working weight climbs further, but 4.8 kg dry keeps it in the range most people can control for a full afternoon of bucking firewood at ground level.

What chain pitch does the Stihl MS 251 use?

The Stihl MS 251 uses a 0.325 inch pitch chain. That pitch sits between the fine 1/4 inch chains of small saws and the 3/8 inch chains of larger machines, giving a smoother, faster cut in mid-size timber. Any replacement chain must match 0.325 inch pitch, plus the correct gauge and drive-link count.

How loud is the Stihl MS 251 and what are its vibration levels?

No sound pressure, sound power or vibration figure is published for the Stihl MS 251 in the specification data ChainsawData holds, so none is listed rather than estimated. What is confirmed is that the MS 251 is a petrol saw with a 45.9 cc engine, and hearing protection is standard practice with any petrol chainsaw of that size.

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Guides that cover this model

How to Choose a Chainsaw: A Practical Buyer's Guide A beginner's route through the decisions that actually determine which chainsaw you need: the job, the power source, the bar length, and the weight you can still hold up after two hours. Chainsaw Bar Length Guide: What Size Do You Need? Bar length decides the diameter of wood a chainsaw can cut, but a longer bar is only useful if the engine can pull it. This guide covers the two-cut rule, recommended versus maximum bar length, and the displacement each length needs. The Best Chainsaw for Firewood: Size, Bar and Models Cutting firewood is repetitive bucking, not felling, and that changes which specifications matter. This guide explains the 45-55 cc sweet spot and names the models that fit each scale of use. Chainsaw Engine Displacement (cc) Explained Displacement is a volume, not a power rating. This guide explains what cc measures, how it relates to kW and HP, why power-to-weight is the better comparison, and what the sub-40cc, 40-50cc, 50-60cc and 60cc-plus bands are for. Professional vs Homeowner Chainsaws: What Differs What actually separates a professional chainsaw from a consumer one, measured in published specifications, and an honest look at whether the premium is worth it for you.

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Source: www.stihlusa.com