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Selection Gas chain saws for property maintenance

MS 251

New compact chain saw with a low emission and fuel-efficient engine

General

MS 251
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The MS 251 is the successor to the popular MS 250 chain saw. This mid-sized unit will deliver great power to get through those bigger cutting jobs. Powered by a low emission and fuel-efficient stratified scavenging engine, it features the STIHL Quickstop® inertia chain brake, Master Control Lever™, anti-vibration system, carburetor preheat shutter for summer/winter operation, toolless fuel and oil caps with retainers and a high power-toweight ratio, making this unit a great chain saw for home or small property owners. Part of STIHL’s new generation of fuel-efficient, environmentally friendly chain saws.

Versions

Featured Price

* Dealers may sell for less. Pricing on all chain saws, power tools and accessories will remain in effect until December 31, 2018. Illustrations and descriptions are as accurate as known at the time of publication and are subject to change without notice. STIHL Limited is not responsible for a printing error, the local STIHL Dealer has the final authority to set product pricing. Pricing valid at participating dealers only.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

Product variations

  • MS 251 C-BE Compact chain saw with Easy2StartTM and Quick Chain Adjuster

Technical data

MS 251

Technical data

Displacement (cc) 45.6
Power output kW 2.2
Weight (kg / lbs) 1) 4.8 / 10.6
Featured price bar (in) 16

1) without fuel, bar and chain

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

Features

MS 251

Standard features

  • STIHL anti-vibration system Zoom
    STIHL anti-vibration system

    Precisely calculated buffer zones minimise the transfer of engine and saw chain vibrations to the front and rear handles. The chainsaw therefore runs noticeably smoother. This allows the user to save their strength and work longer.

  • Reduced-emission engine technology Zoom
    Reduced-emission engine technology

    2-stroke engine with stratified charge. A fuel-free layer of air is created between the burned charge in the combustion chamber and the fresh charge in the crankcase, reducing the amount of fuel lost during the charge cycle. This results in more power with a lower weight, up to 20% lower fuel consumption than regular 2-stroke engines and significantly reduced exhaust emissions.

  • Pre-separation air filtration system Zoom
    Pre-separation air filtration system

    STIHL long-life air filtration systems with pre-separation achieve perceptibly longer filter life compared with conventional filter systems. Air drawn in is swirled. The larger, heavier particles are ejected. The pre-cleaned air is routed to the air filter via the pre-separator duct.

  • Tool free fuel caps Zoom
    Tool free fuel caps

    Special caps to open and close the tank cap quickly, easily and without tools.

  • Compensator Zoom
    Compensator

    This controller in the carburettor prevents the fuel-air mixture getting richer as the air filter becomes clogged. The correct quantity of fuel is delivered to the carburettor depending on the quantity of air passing through the air filter. This keeps the fuel/air ratio in the combustion mixture constant and hence also the engine power. The filter doesn't need to be cleaned until an appreciable drop in power occurs.

  • STIHL Ematic System Zoom
    STIHL Ematic System

    Compared to conventional bars without Ematic, the STIHL Ematic system reduces the consumption of chain lubricant by up to 50 %, depending on the type of wood and the cutting attachment used. This system comprises a STIHL Ematic or Ematic S guide bar, a STIHL Oilomatic saw chain and a variable-flow or reduced-flow oil pump. As a result, virtually every drop of chain lubricant is delivered to exactly the right spot.

  • Side-mounted chain tensioning Zoom
    Side-mounted chain tensioning

    The tensioning screw can be found on the side of chain saw through the sprocket cover. This removes the need for contact with the sharp saw chain.

  • Single-lever master control Zoom
    Single-lever master control

    All important functions such as start, choke, throttle and stop are operated via a single lever.

Additional features

  • STIHL ElastoStart Zoom
    STIHL ElastoStart

    Due to compression pressure, jerky stresses occur when starting internal combustion engines. The damping element in the ElastoStart special starter grip alternately absorbs and releases force according to the compression pattern. The result is smooth, even starting.

We present some Product Technology features in product technology .

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

Documents

Owners manuals and safety brochures

STIHL MS 231, 251 Download PDF, 4.4 MB

Notes:

  • STIHL and VIKING online owner’s manuals are usually for the latest versions of the machine. Your product may be a slightly older production model but the manual will still be appropriate for the relevant model number.
  • The languages ​​contained in the document are also displayed in brackets, for example (GB) = English.