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Stihl MS 251 18" Bar Chainsaw

€633.33 €520.62 Ex. VAT

Code Stihl MS 251
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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 regulart 2-stroke engines and significantly reduced exhaust emissions.

Anti-vibration system Intense vibration at the handles of power tools can lead to long-term effects on blood vessels in the hands and arms. STIHL has therefore developed an effective anti-vibration system whereby the oscillations from the machine's engine are dampened which significantly reduces vibrations at the handles.

Pre-separation air filtration system STIHL long-life air-filtration systems with pre-seperation achieve preceptibly longer filter life compared with convential 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-seperator duct.

Compensator This controller in the carburator prevents the fuel-air mixture getting richer as the air filter becomes clogged. The correct quantity of fuel is delivered to the carburator 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.

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

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

Ematic chain lubrication System The Ematic chain lubrication ensures pinpoint lubrication of the saw chain links and guide bar rails. When used with STIHL OILOMATIC saw chain, it will provide maximum lubrication, longer wear and less oil consumption than convential methods of chain lubrication. The Ematic system can reduce bar oil consumption by up to 50%.

Tool free filler caps Special catches on the fuel and oil tanks for easy opening and locking without the need for tools.


  • Engine Size 45.6cm
  • Power Output 2.2kW/3.0bhp
  • Bar Length 16""
  • Weight 4.8kg
  • Saw Chain Pitch .325""
  • Sound Pressure Level 103 dB(A)
  • Sound Power Level 114 dB(A)
  • Vibration level left/right 3.9/3.9 m/s



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