Stihl MS 251 C-BE (16" OR 18")
Ideal for cutting firewood, felling small trees and when a bit more power is needed. This saw is easy to guide and has great handling.
Compact chainsaw with excellent power-to-weight ratio. With up to 20% less fuel consumption and up to 70% fewer emissions compared to STIHL two-stroke engines of the same performance class without 2-MIX technology. Ideal for cutting firewood, felling small trees and when a bit more power is needed. This saw is easy to guide and has great handling. With STIHL Quick Chain Tensioning and STIHL ErgoStart.
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-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.
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.
Manual fuel pump (Purger)
A small fuel pump delivers fuel to the carburettor at the touch of a button. This reduces the number of starting strokes required following extended breaks in operations.
Single-lever master control
All important functions such as start, choke, throttle and stop are operated via a single lever.
Ematic chain lubrication system
The Ematic chain lubrication system 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 conventional methods of chain lubrication. The Ematic system can reduce bar oil consumption by up to 50%.
STIHL ErgoStart (E)
A genuine advance in easy starting. STIHL ErgoStart (E) cuts the effort required to start the tool by half, while the starter cord can be pulled at just one third of the normal force. All it takes is 2 fingers and a gentle pull action.
Chain Quick Tensioning (B)
After releasing the sprocket cover the chain can be adjusted using a thumb wheel without the need for tools.
Tool free filler caps
Special catches on the fuel and oil tanks for easy opening and locking without the need for tools.
Technical data Value Displacement cm³ 42.6 Power output kW/bhp 2/2.7 Weight kg 1) 5.1 System weight kg 2) 5.78 / 5.88 Power-to-weight ratio kg/kW 2.6 Sound pressure level dB(A) 3) 103 Sound power level dB(A) 3) 114 Vibration values left/right m/s² 4) 3.9/3.9 STIHL Oilomatic saw chain pitch/type 3/8" P PM3 Oil pump Not adjustable Tank volume l 0.39 Chain pitch 3/8" P Chain tensioning Chain Quick Tensioning,Side chain tension Sprocket - number of teeth 6.6 Z Filter Long-term filter system / round cartridge filter Bumper spike Steel claw Cylinder Chrome Oil tank volume cm3 200 Sprocket Profile chain row,Sprocket profile Anti vibration system AV Steel Spring,AV System, steel spring Filler cap Tools,WTV tool-free tank cap EPA Certified fuel consumption l/h 1.06 CO2 g/kWh 917 Handle type Standard grip,Standard handle Speed at maximum power Um 10.000 EPA Certified fuel consumption glh 0.28