MS 251 Petrol Chainsaw

Sitting at the top of STIHL’s homeowner/farm range, the MS 251 couples a fuel-saving 2-MIX engine with a long-life pre-separation/HD2 air-filtration system that cuts fuel use by approximately 20% and stretches filter-clean intervals up to five-fold. At 4.8 kg dry weight it delivers a favourable 2.2 kg/kW power-to-weight ratio, and STIHL’s five-point anti-vibration buffers keep handle values around 3.9 m/s² so you can buck stove-wood or limb storm-fallen trees for hours without excess fatigue. Tool-free bayonet caps speed refuelling, while a side-mounted tensioner and captive bar-nuts make chain care safe and simple.

Key features

• 45.6 cm³ 2-MIX engine (2.2 kW / 3.0 bhp) — 20% lower fuel use and 50% fewer emissions than earlier designs.
• Long-life HD2 filter with pre-separation — ejects 80% of dust before it reaches the fleece element.
• Side-access chain tensioner & captive nuts — quick, safe chain adjustment.
• STIHL anti-vibration system — keeps HAV around 3.9 m/s².
• Tool-free fuel & oil caps — flip-up lids open in seconds, even with gloves.

Technical highlights

Why choose the MS 251?

It marries farm-saw torque with homeowner convenience: a fuel-sipping engine, long-life filter, low vibration and user-friendly service points mean more wood cut and less time servicing — perfect for firewood, estate upkeep and small-timber felling.