STIHL MS251-18 45.6 cc Chainsaw w/ 18" Bar

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    Specs


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Master Control Lever™

The Master Control Lever™ is an easy to use single lever, operating the choke, starting throttle lock and on-off switch. The operator must pull the throttle trigger before moving the Master Control Lever™ to the choke position.

Reduced-Emission Engine Technology

The STIHL Inc. "Caring for Nature" seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines "low exhaust emissions" as being cleaner than EPA and/or CARB exhaust emission standards.

Toolless fuel and oil caps with retainers

Simply lift the lever and twist the caps to remove or tighten. ThereŠs no need to use a tool to tighten or loosen.


Chain Oil Capacity

6.7 oz.


Occasional Use

Engine Displacement

45.6 cc

Engine Power

2.95 bhp

Fuel Capacity

13.2 oz.

Guide Bar Length


Oilomatic® Chain

.325 RM3

Power Source


Powerhead Weight

10.8 lbs.