MS 251 WOOD BOSS® - $329.95 DSRP


Distributor Suggested Retail Price
18 in. Bar

DSRP: $329.95

Quantity:

Reserve with STIHL Express for In-Store Pick Up

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

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    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

  • Zoom
    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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    Woodsman Chainsaw Carrying Case
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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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MS 251 WOOD BOSS® is rated 4.4 out of 5 by 270.
Rated 1 out of 5 by from good power bad design 30 years exp. used saw for less than 3 hours chain tensioner froze would not loosen or tighten clutch is already wore out repair guy says.called stihl waiting on outcome.
Date published: 2017-10-09
Rated 5 out of 5 by from Let the Chips Fly I upgraded from an MS 170 which I used for 4 years and cut over 30 cords of wood and probably 100+ old growth dead standing red oaks with... It is still going strong and is a joy to use. It was light and easy to manuever for limbing.The MS 251 excels are raw power and vibration control. It also starts really well. It is much heavier to use for hours on end, but if you limb with a small saw and then fire up this for the main trunk and branches, the job goes a lot faster with less fuss. It can handle anything you will find on the east coast with the 20" bar. The bar is actually a bit much and I can't wait to re-fit it with a 16" to try for limbing and small trees. It ate up these huge hemlocks and ripped right through really tough hard beech that my MS170 struggles with unless ultra sharp.
Date published: 2017-10-06
Rated 5 out of 5 by from Nice surprise This is my 3rd chain saw purchase and my first Stihl. The reliability of this saw is great. Starts after a pull and runs like a champ. I used this to clean up trees downed by a hurricane and where other chainsaws might have balked or broke this one cut without hesitation.
Date published: 2017-10-03
Rated 5 out of 5 by from Starts Every Time Cuts great, easy to handle, runs smooth. Very useful around our farm!
Date published: 2017-09-29
Rated 5 out of 5 by from Excellent for small property I own a small amount of acreage and for clearing of small to medium size trees this saw is more than capable for the job. This saw is easy to handle and won't vibrate your hands numb like some other saws.
Date published: 2017-09-25
Rated 4 out of 5 by from Plenty of power Runs great. The only issue im having is not enough bar oil comes out during use. But other than that is chews through anything you throw at it....
Date published: 2017-09-24
Rated 5 out of 5 by from Excellent saw This is my first chainsaw. It has a lot of power at an affordable price. It cuts through logs with no problem and isn't too heavy. If you are unsure of the size saw you need for homeowner tasks and occasional bigger jobs, this is the way to go! Oh and very easy to start if you read the instructions on how to do it.
Date published: 2017-09-21
Rated 5 out of 5 by from Another Quality Stihl Product I work for a licensed Stihl dealer in Ottawa lake Michigan. I see the high quality and great value of many Stihl products on a daily basis. Previously I worked for a landscape company experiencing many tools in the field and now in the shop. Picked up this saw for work around home and small side jobs. have put 4-5 tanks of fuel through the saw. Running Moto-Mix, Wood cutter bar oil, 18" bar with a full chisel chain this saw is a running sun of a gun. been very impressed with the weight to power ratio of the saw thus far. Keep a sharp full chisel chain on the saw and it will cut through most small timber in the Ohio/Michigan area with ease. only complaint is the saw has a single bar nut so keep a scwrench handy and check that the bar nut is tight regularly. Haven't had any issues thus far just an precaution I deemed necessary since purchase.
Date published: 2017-09-21
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