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: Cancer and Reproductive Harm - www.p65warnings.ca.gov
ADVERTENCIA: Cáncer y Daño Reproductivo - www.p65warnings.ca.gov
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 343.
Rated 4 out of 5 by Chuck1969 from one hot restart issue other than that runs like a dream I have used a lot of hand saws and chainsaws hands down the best gift my wife has given me except for our kids
Date published: 2018-06-15
Rated 4 out of 5 by Craig22 from Great Saw, but I have had issues starting it. Great Saw, but I have had issues starting it. Once it starts, it has been great.
Date published: 2018-06-14
Rated 5 out of 5 by joem399 from Wood Boss I"ve owned other chainsaws, but nothing compares to a stihl. I love it.
Date published: 2018-06-12
Rated 5 out of 5 by Brahmi from Best Product This is working as we expected. We are maintaining this machine easily
Date published: 2018-06-09
Rated 5 out of 5 by woodcutter21 from This is a great saw. Far exceeds expectations. Its an awesome saw........................................................
Date published: 2018-06-04
Rated 2 out of 5 by MiketheSawMan from No Power. Broke the 2nd day I used it. I am a homeowner so did not need a professional saw, but wanted to replace my roughly 20+ year old Poulan 260 Pro that I bought at Lowes. It had always started easy and cut great, but several parts were wearing out so I decided to run up the road an buy a new saw. The salesman pointed me to the 251 when I told him I wanted an 18" bar. It started easy enough (despite the many reviews that say it does not), and for small limbs, it cuts just fine. Try taking down a 10" diameter tree or cutting a stump at the base and forget it. Binds up and bogs down. To make matters worse, the bolt that holds on the bar unscrewed from the frame when I went to remove the outer nut to change the chain (which dulled after 3 stumps). I will return it next week. As I side note, I got my old Poulan running and buzzed thru about 12 stumps and took another tree down without any hesitancy or having to change the chain. Very disappointed especially for the price (not to mention no case or extra chain).
Date published: 2018-06-02
Rated 5 out of 5 by Drumstix from The perfect saw for small to medium jobs This saw is a work horse. It's light weight and easy to use.
Date published: 2018-06-02
Rated 5 out of 5 by Dingo56 from This saw replaced my 028. Saw . My Wood Boss has been performing like a champ, Cut a lot of fire wood! Purchased this 2 Year’s ago. Have a larger Stihl saw ,but this Wood Boss is my go to 98% of the time. Great products!
Date published: 2018-05-29
