STIHL - FS 91

Air Filter Cover

Easily removed for fast and easy filter cleaning or replacement.

Anti-Vibration System

STIHL has a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.

Heavy-Duty Steel-On-Steel Clutch

Centrifugal clutch is designed to reduce slippage.

Made in America

A majority of STIHL products sold in America are made in America of U.S. and foreign materials.

Simplified Starting Procedure

To get started, simply pump the fuel primer, set the choke and pull the starter cord. The built-in stop switch allows the user to turn off the engine with a simple press of the button. When the engine is off, the throttle lock automatically returns to the “start” setting. Your power tool will be ready to be started when you’re ready to get back to work.

Protected or Enclosed Control Cables

Eliminate dangling and loose wires.

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.

Loop Handle (R)

Loop handle grass trimmers and brushcutters are ideal for trimming between bushes and shrubs and other areas where space is limited.

Throttle Trigger Interlock

Must be depressed before the trigger can be activated.

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.

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.

Protected Spark Arrestor Muffler

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

Cutting Heads & Blades Selection Chart

Need help selecting a cutting head or blade for your STIHL trimmer or brushcutter?

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.

Trimmer Line

There's high-performance STIHL trimmer line for every operating condition.

High Tech Polymer Housing

Housings are lightweight, withstand greater impact and are corrosion-resistant.

Straps and Harnesses

They distribute the load from your hands to your shoulders. They also help reduce operator fatigue and make it easier to use trimmers, brushcutters and clearing saws for extended periods.

Upright Translucent Fuel Tank

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

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°.

Protected Spark Plug

Protected yet easy to change.

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 Choke Lever/Knob

Helps prevent damage.

Fully Lined Drive Shaft

Provides smooth operation and less vibration.

Trimmer Heads & Blades

Many trimmer heads and blades are available. Find out which ones to use with this model in this chart. 

Gearbox Attachments

Gearbox attachments are available for this model.