The STIHL MS 251 WOOD BOSS Chainsaw is designed to deliver all the power you’d expect from STIHL equipment, yet 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. And with up to 20 percent fuel savings and 50 percent reduced emissions (as 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.Features Built in the USA Reduced-Emission Engine Technology - Caring for Nature Toolless fuel and oil caps with retainers Master Control Lever™ Specifications DISPLACEMENT: 45.6 cc (2.78 cu. in.) ENGINE POWER: 2.2 kW (3.0 bhp) POWERHEAD WEIGHT: 4.9 kg (10.8 lbs.) FUEL CAPACITY: 390 cc (13.2 oz.) CHAIN OIL CAPACITY: 198 cc (6.7 oz.) OILOMATIC CHAIN: .325" RM3 GUIDE BAR LENGTHS (Recommended ranges): 40 to 45 cm (16" to 18") STIHL ROLLOMATIC POWER SOURCE: Gas Power: Gas Blade Length: 18"