Stihl FS 251

Reduced-Emission Engine Technology - Caring for Nature
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.

CARB compliant
This product meets the current emission standards set by CARB and can be sold in California under the new CARB laws.

Rugged Professional Design
Built to make tough work more comfortable, the FS 561 C-EM features a rugged professional design with 4-point anti-vibration system that allows for optimal control and reduced fatigue.

High Tech Polymer Housing
Housings are lightweight, withstand greater impact, and are corrosion-resistant.

Fully Lined Drive Shaft
Provides smooth operation and less vibration.

Throttle Trigger Interlock
Must be depressed before the trigger can be activated.

Air Filter Cover
Easily removed for fast and easy filter cleaning or replacement.

Protected Choke Lever/Knob
Helps prevent damage.

Protected Spark Plug
Protected yet easy to change.

Protected or Enclosed Control Cables
Eliminate dangling and loose wires.

Cutting Heads & Blades Selection Chart
Need help selecting a cutting head or blade for your STIHL trimmer or brushcutter?

Upright Translucent Fuel Tank
Allows operator to easily check fuel level before starting work. Upright position makes it easier to refill.

Bike Handle
When used in conjunction with a harness, the bike handle allows the machine to be easily guided, enabling a smooth horizontal mowing action to cover large areas quickly and efficiently. With soft grips for increased comfort, the bike handle provides greater control and helps reduce operator fatigue.

Protected Spark Arrestor Muffler
Has large baffles which reduce noise level and contains a screen designed to reduce the emission of sparks.

Purge Pump Primer
By pressing the bulb, this small fuel pump delivers fuel to the carburetor, reducing the number of starting pulls needed after an extended break between uses.

Tool-Free Handle Adjustment
The central wing nut enables easy adjustment without the use of tools. For transportation and space-saving storage, the handle can be rotated 90°.

IntelliCarb™ Compensating Carburetor
The IntelliCarb™ Compensating Carburetor measures the air pressure on the clean side of the air filter and adjusts the metering diaphragm in the carburetor. This keeps the RPM at a consistent level, even when the air filter begins to clog.

STIHL ElastoStart™
The ElastoStart™ starter handle is a feature of STIHL. It is a starting grip with a built-in shock absorber that helps reduce the effort when pulling on the starter cord. The ElastoStart™ starter grip noticeably reduces the sudden peak forces (compression) normally felt during cranking. The forces which occur at the grip after the first compression stroke are smoothed out.

Shoulder Strap / Carrying System
Using a shoulder strap or carrying system helps distribute the weight of the equipment for increased operator comfort and improved maneuverability.

Powerful low-exhaust-emission Engine
Built with a powerful low-exhaust-emission engine which saves users fuel and operating costs without losing the power they count on to get the job done.

Semi-Automatic Choke Lever
The semi-automatic choke lever enables the simplified three-step start procedure, saving users time and allowing them to start jobs faster

Vertical Pleated Paper Air Filter
Thanks to better air filtration due to its greater surface area, the vertical pleated paper air filter can extend the time between servicing.