MS 251 WOOD BOSS® - $339.95 DSRP
A powerful and fuel-efficient chainsaw that’s comfortable to use.
The STIHL MS 251 WOOD BOSS® Chainsaw is powerful, fuel-efficient and easy to use. Ergonomically designed to bring you maximum comfort during use, this tool produces 50 percent less emissions (as compared to previous models) for a smaller impact on the environment. The MS 251 WOOD BOSS® packs features like a Master Control Lever™ and easy-to-refill fuel and oil tanks, so you can worry less about st...Read More
Model Features
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Built in the USA
Indicates products that are built in the United States from domestic and foreign parts and components. -
Reduced-Emission Engine Technology - Caring for Nature
The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards. -
Toolless fuel and oil caps with retainers
Simply lift the lever and twist the caps to remove or tighten. There‘s no need to use a tool to tighten or loosen. -
Master Control Lever™
The Master Control Lever™ is an easy to use single lever, operating the choke, starting throttle lock and on-off switch. The operator must pull the throttle trigger before moving the Master Control Lever™ to the choke position.
Standard Features
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Common Features for Chainsaws
View the features common to many STIHL chainsaws.
Important Information
* The actual listed guide bar length can vary from the effective cutting length based on which powerhead it is installed on.
WARNING! Improper use of any power tool may cause serious
or fatal injury. Read, understand and follow carefully the operating
and safety instructions in your instruction manual before using such products.
STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.
Click to view the STIHL Limited Warranty Time Periods
STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.
We Also Suggest
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HP Ultra 2-Cycle Engine Oil
HP Ultra is a fully synthetic 2-cycle engine oil specially suited for high performance chainsaws and power tools. This oil has outstanding engine cleaning characteristics, plus “ultra” superior lubricating qualities in comparison to other 2-cycle engine oils. It is ideal for use in STIHL 4-MIX® engines. This oil is biodegradable, degrading by 80% in 21 days.•2.6 oz. bottle makes 1 gallon mix
•5.2 oz. bottle makes 2 gallon mix
•6.4 oz. bottle makes 2 1/2 gallon mix
•12.8 oz. bottle makes 5 gallon mix
STIHL recommends a mix of 50:1 high-quality 89 octane or higher unleaded gasoline to STIHL engine oil. This same mix ratio should be used during break-in. -
Bar and Chain Oil
STIHL Bar and Chain oil is formulated to adhere to the bar and chain, and to reduce wear. Special agents in the oil formulation help keep sap and pitch from clinging to the bar and chain.Available in quart and gallon bottles, 5 gallon pails and 55 gallon drums, in both summer and winter weights.
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Woodsman Chainsaw Carrying Case
Woodsman carrying case. Unique, removable bar scabbard has built-in tool holders to carry tools to the cutting site. Fits MS 170 to MS 460 M with 20" bar.Replacement latches and scabbard are available.
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Complete Filing Kits
Kits available for the following chain types: STIHL PICCO™ Mini; 1/4" pitch chain; .325" pitch chain; 3/8" pitch chain; .404" pitch chain.
Includes file guide, depth gauge, round file, flat file and two file handles in tool pouch.Chain Pitch File Diameter File Guide
Part NumberSharpening Kit
Part Numberin. mm in. mm Part Number 3/8 PMN 9.32 5/32 4.0 0811 411 8073 1/4
3/8 PM6.35
9.325/32 4.0 0811 411 8091 0.325 8.25 3/16 4.8 0811 412 8088 3/8 9.32 13/64 5.2 0814 243 3384 5605 750 4329 0.404 10.26 7/32 5.5 0811 412 8108 5605 750 4330
For Your Safety
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Woodcutter Chaps - 6 Layer
Woodcutter Chaps - 6 Layer from STIHL are made from rugged, 400-denier nylon and feature the same UL® classified protection as our other chaps. Just snap them over your pants and you’re ready to go. Sewn into the legs of the chaps are six layers of Avertic® Pro by Engtex®, a cut-retardant material designed to clog the sprocket and stop the saw chain on a gasoline-powered chainsaw in case of accidental contact with the rotating saw chain. The open-back design of these chaps makes them a great choice for hot working conditions. -
Woodcutter Helmet System
The lightweight STIHL Woodcutter Helmet System is an excellent choice for budget-conscious non-professional users with chainsaws and pole pruners. Designed for comfort, the vented shell provides cooling air during use, and the 6-point mount suspension provides comfortable support. The STIHL Woodcutter Helmet System is Class G certified and includes NRR 22 hearing protection. -
STIHL Pro Mark™ Dynamic Protective Gloves
Durable and hardworking, STIHL Pro Mark™ Dynamic Gloves deliver professional-grade hand protection. The palm and inner fingers are made of full grain tanned leather, so you can work with comfort without sacrificing a firm hold. Featuring multiple layers of cut-retardant materials – Avertic™ Pro and Dyneema fabrics by Engtex® – these gloves will help deliver protection without compromising the dexterity you need while operating a chainsaw. Accented with an orange rip-stop nylon backing, these dynamic gloves offer style and protection. Water repellant, breathable and featuring a Velcro wrist closure, STIHL Pro Mark™ Dynamic Gloves are as ready for the woods as you. -
STIHL® HellRaiser™ Glasses
The newest member of the STIHL protective eyewear – the STIHL® HellRaiser™. It offers 99% UV protection and style with enough attitude to protect your inner rebel. Featuring an extreme lightweight design and flex-point temples for ultimate comfort and stability.
MS 251 WOOD BOSS® is rated out of 5 by 317.
Rated 5 out of 5 by LakeCity59 from It's a Boss for sure Bought this saw for my property (large oak and pine), went through them like hot butter. This is my first saw and it will not be my last Stihl. Great tools for the price.
Date published: 2018-04-13
Rated 5 out of 5 by Ecast25 from Beast I've never owned a chainsaw before, so I knew that my 1st one had to be a great one. This thing is a beast. At first it took me a few tries to get it started nice I didn't know the compression was so high (as compared to my other equipment ). But once I got it started, this thing ate through everything. Very happy with the purchase.
Date published: 2018-04-11
Rated 4 out of 5 by LarryC from Apparent same Stihl quality. Just what you would expect from a Stihl saw. Only problem is the difficulty of starting the saw for the first few times.
Date published: 2018-04-10
Rated 3 out of 5 by howard4 from Good saw, except for fuel and oil tank caps. I don't understand why you can't make usable caps for the fuel and oil tanks. Everyone I have talked to hates them. They are extremely difficult to replace after filling. Just put some threads on them, like every other manufacturer!
Date published: 2018-04-07
Rated 5 out of 5 by spiderbob from Great Value This is a very good saw for trimming trees and cutting firewood. The initial starting I would recommend NOT using full choke as it will flood the engine. After the first initial starting it is easy to start every time so far. I am very pleased, but I bought it for occasional use not as a professional logger. When used as intended I believe it will last a long time. I feel I bought the best tool for the money I spent and do not regret it.
Date published: 2018-04-04
Rated 5 out of 5 by AeroX from A good chainsaw overall This Chainsaw is a good product if your cutting wood isn't thicker than 40 cm. I use this chainsaw with the Stihl RS chain and it goes really good.
Date published: 2018-03-28
Rated 5 out of 5 by BoyHowdy from Great saw. Just what I expected from a Stihl ! This saw replaces a 30 year old Stihl “025” . I plan to use only alcohol free gas in this one to get even more years out of it.The new MS251 is just what I expected from a Stihl. It starts easily, runs strong, and uses the chains from my old 025 !Great Saw !!
Date published: 2018-03-23
Rated 5 out of 5 by Wes65 from Sharp chain I recently purchased a Stihl ms251 wood boss. I'm very impressed with the capability of this saw. I'm using it for firewood cutting up logs that are up to 10 in. In diameter. The saw powers right through the wood. When it sounds like the motor is bogging down, just give it more throttle and the Wood Boss chews through the wood. Starting the saw is easy if you can read. All in all i love this saw and look forward to many years of use.
Date published: 2018-03-22
