The WOOD BOSS® is packed with reduced exhaust emission engine technology and the power STIHL is known for.
 
The STIHL MS 251 WOOD BOSS® chainsaw is designed to deliver all the power you’d expect from STIHL equipment with a comfortable and ergonomic design. The MS 251 WOOD BOSS® is perfect for felling small trees, pruning and thinning, and cutting firewood simply and efficiently. With up to a 20 percent increase in fuel savings and a 50 percent reduction in exhaust emissions—when compared to previous models—you can enjoy a longer run time while feeling good about your impact on the environment. Features like a Master Control Lever™ and reduced vibration make the STIHL MS 251 WOOD BOSS® a lean, easy-to-use machine that still packs plenty of power.