MS 251 WOOD BOSS® - $339.99 DSRP


Distributor Suggested Retail Price 18 in. Bar DSRP:  $339.99

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
Print Spec Sheets
MS 251 WOOD BOSS® Specifications
DISPLACEMENT 45.6 cc (2.78 cu. in.)
ENGINE POWER 2.2 kW (2.95 bhp)
POWERHEAD WEIGHT 4.9 kg (10.8 lbs.)
FUEL CAPACITY 390 cc (13.2 oz.)
CHAIN OIL CAPACITY 198 cc (6.7 oz.)
OILOMATIC® CHAIN .325" RM3
GUIDE BAR LENGTHS* (Recommended ranges) 40 to 45 cm (16" to 18")
STIHL ROLLOMATIC®
POWER SOURCE Gas
STIHL recommends #3634 (26 RM3 68) OILOMATIC® saw chain and 18" 3005 008 4717 STIHL ROLLOMATIC® E guide bar combination. The actual listed guide bar length can vary from the effective cutting length depending upon which powerhead it is installed.
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.

    More Information

  • Zoom
    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.

    More Information

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    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.
  • Zoom
    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
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    •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 Zoom
    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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    Replacement latches and scabbard are available.

  • Complete Filing Kits Zoom
    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 Number
    Sharpening Kit
    Part Number
    in. mm in. mm Part Number
    3/8 PMN 9.32 5/32 4.0 0811 411 8073

    5605 750 4327

    5605 007 1026

    1/4
    3/8 PM
    6.35
    9.32
    5/32 4.0 0811 411 8091

    5605 750 4327

    5605 007 1027

    0.325 8.25 3/16 4.8 0811 412 8088

    5605 750 4328

    5605 007 1028

    3/8 9.32 13/64 5.2 0814 243 3384 5605 750 4329

    5605 007 1029

    0.404 10.26 7/32 5.5 0811 412 8108 5605 750 4330

    5605 007 1030

For Your Safety
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Are You Ready for a STIHL?

MS 251 WOOD BOSS® is rated 4.4 out of 5 by 241.
Rated 3 out of 5 by from I'v had it for three days only used it for 6 hours I dont its ok so far. maybe with a little mor use I might be able to give a better review
Date published: 2017-07-13
Rated 3 out of 5 by from Chain tighening screw stripped after third use The chainsaw cuts like a dream, when everything is functioning properly. During the third use, the chain became loose and slipped off the bar. While putting it back on, with normal pressure, the tightening screw stripped on the inside. Seems as if the plastic parts malfunctioned. Everyone said buy a Stihl because it will last a lifetime. I hope this is the case once it's fixed. But, for now I'm questioning my purchase and it's ability to work through the test of time.
Date published: 2017-07-11
Rated 5 out of 5 by from Great saw Saw starts easy, cuts great, and no problems. Really like the saw. Lighter than the Farm Boss I used from 1975 to 2016
Date published: 2017-07-10
Rated 4 out of 5 by from Light weight! Nice running saw for the money, but it don't have much power so be prepared fortime for getting the job done because it will be slow.
Date published: 2017-07-04
Rated 2 out of 5 by from Easy starting but oiler doesn't keep chain oiled properly I really want to love this saw but I can't. The engine starts and runs great as long as you follow the starting procedure. The single bolt holding the chain works fine but does allow bar to loosen and constantly needs adjusting.The big problem, and I see others have the issue as well, is the bar oiler doesn't put near enough oil on the bar. This can cause the bar and chain to heat up and become dull a lot quicker. You have to be very careful to not allow bar to heat up. I took the chainsaw in and they said it is working normally. I was told this was done on purpose to use less oil and be better for the environment. I have all Stihl products and love them all except this chainsaw. I probably should have bought a more professional saw. I would seriously doubt the pro series has this issue.
Date published: 2017-06-20
Rated 1 out of 5 by from 2 chains broke in one Day, never buy again! Worst Chainsaw I ever owned, never in 20 years did I have chains actually break, until I bought this Stihl.
Date published: 2017-06-19
Rated 4 out of 5 by from Starts, runs and cuts great but the bar is constantly loosening. I love how easy it is to start! Only 2 or 3 pulls cold and 1 or 2 warm. This saw has plenty of power but the bar tends to loosen quickly.
Date published: 2017-06-18
Rated 4 out of 5 by from Great saw This thing cuts like a beast, but I have noticed the chain dries out faster than the oiler can lubricate it on larger jobs. I manually lube the chain when I have to make continuous cuts. Other than that, I love it.
Date published: 2017-06-07
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