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Selection Petrol chainsaws for property maintenance

MS 251

MS 251 petrol chainsaw: robust and versatile

General

MS 251
MS 251

The new MS 251 is ideal for a variety of applications, from cutting firewood to timber construction. This high torque engine is easy to start and comfortable to use, with a high cutting performance. Emissions are cut by 70% and fuel consumption is up to 20% lower compared to a STIHL 2-stroke engine of the same power output without 2-MIX technology.

Versions



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

Technical data

MS 251

Technical data

Technical data Value
Displacement cm³ 45,6
Power output kW/bhp 2,2/3
Weight kg 1) 4,8
Power-to-weight ratio kg/kW 2,2
Sound pressure level dB(A) 2) 103
Sound power level dB(A) 2) 114
Vibration level left/right m/s² 3) 3,9/3,9
STIHL Oilomatic saw chain type .325" RM
Recommended bar length cm/inch 45cm/18"

1) Without fuel, without bar and chain
2) K-factor according to DIR 2006/42/EC = 2.5 dB (A)
3) K-factor according to DIR 2006/42/EC = 2m / s ²

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

  • 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.

  • 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 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.

  • 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.

  • Single-lever master control
    Single-lever master control

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

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

    Side-mounted chain tensioning makes it easy to tension the chain safely.

  • Tool free fuel caps Zoom
    Tool free fuel caps

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

Additional features

  • Long-life air filter system with air routing Zoom
    Long-life air filter system with air routing

    Compared with conventional air filter systems, the service life of the filter is significantly increased.

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.

Accessories

MS 251

Accessories

    • Filing kit Zoom
      Filing kit

      Includes file holder with round file, flat file and file gauge in a sturdy case.

    Versions

    • 2-in-1 file holder Zoom
      2-in-1 file holder

      Practical tool for quickly sharpening the teeth and depth gauge in a single step. Ideal for occasional users. For 1/4" P, 3/8" P, .325", 3/8" and .404" saw chains, integrated file tolerance compensation (only from STIHL).

    Versions

    • HP two-stroke engine oil Zoom
      HP two-stroke engine oil

      Top selling mineral oil two-stroke engine oil. Specially developed for STIHL engines. Excellent lubrication and combustion properties. Performance class: JASO-FB, ISO-L-EGB. Fuel/oil ratio 50:1.

    Versions

    • SynthPlus chain oil Zoom
      SynthPlus chain oil

      Semi synthetic high performance lubricant is made from high grade base oils (refined oils) which prevents resinification during prolonged downtimes. Outstanding protection against wear.

    Versions

    • FUNCTION chainsaw boots Zoom
      FUNCTION chainsaw boots

      Entry level model made of high quality full grain leather, with high grip soles and breathable textile lining. Also protects against moisture, wear and abrasion. Protection according to EN 17249, protection class 1 (=^20 m/s) and EN 20345 S2.

    Technical data Value
    Leg height 20 cm
    Weight 1) 1,9 kg
    Cut protection class Class 1
    Size 39 - 47

    1) Approx per pair, using size 42

    Versions

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.

Dokumente

Gebrauchsanleitungen

Languages Date Link
manual icon en 21/02/2023
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