FS 91

If you’re a landscaping professional who uses their trimmer for mowing applications, grab the powerful STIHL FS 91 trimmer. Its bike-handle design adds greater comfort and leverage, thanks to its redesigned rubberized grips. The trimmer also features one touch stop and a simplified starting procedure enabled by the semi-automatic choke lever. Its low-emission engine is paired with a larger fuel tank, delivering 30% longer run times when compared to the FS 90. The engine also includes improved air filtration and STIHL exclusive IntelliCarb™ technology for maximum RPM. And when the terrain gets tough, this trimmer’s solid steel drive shaft accepts a wide range of heavy-duty cutting heads, including metal blades, for maximum versatility.

*Finance available from 36 to 48 without interest.

Built in the USA
Indicates products that are built in the United States from domestic and foreign parts and components.

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.

Multi-Function Control Handle 
Having easy access to all of the controls on one comfortable handle makes it easy to complete tasks so the operator’s hand never has to leave the handle.

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°.

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. 

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.

Fully Lined Drive Shaft 
Provides smooth operation and less vibration.

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

Protected Choke Lever/Knob 
Helps prevent damage.

Start/Run/Stop Controls on Handle

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 or Enclosed Control Cables 
Eliminate dangling and loose wires.

Heavy-Duty Steel-On-Steel Clutch 
Centrifugal clutch is designed to reduce slippage.

Protected Spark Plug 
Protected yet easy to change.

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

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