Stihl FS91

Key Features:

Made in America: The majority of STIHL products available in the United States are manufactured in America using U.S. and global materials.

Intellicarb Compensating Carburetor: The IntelliCarb™ Compensating Carburetor automatically adjusts the air/fuel ratio when the air filter becomes restricted or partially clogged, maintaining the engine's correct RPM. This system utilizes air from the clean side of the air filter to control the diaphragm and fuel flow. As the air filter becomes dirty and less air is available for the carburetor, the IntelliCarb™ system adapts the fuel flow to compensate for the decreased air flow. This is in contrast to typical carburetors that draw air from the "dirty" side of the air box.

Translucent Fuel Tank: The translucent fuel tank enables the operator to easily check the fuel level before commencing work.

Reduced-Emission Engine Technology – Caring for Nature: The STIHL Inc. "Caring for Nature" seal designates its powered products as environmentally conscious, producing minimal or zero exhaust emissions. STIHL Inc. defines "low exhaust emissions" as exceeding the exhaust emission standards set by EPA and/or CARB.

Simplified Starting Procedure: A simplified starting procedure saves time and reduces the chance of flooding the engine when starting.

Purge Pump Primer: The purge pump primer feature facilitates priming the carburetor with fuel, making starting easier. This feature is designed to prevent over-priming, ensuring that the machine is not flooded with excess fuel if the choke is not disengaged after the engine ignites.

Multi-Function Handle: The multi-function handle enables one-handed control of all blower functions, ensuring straightforward and reliable operation for both right and left-handed users.

Shoulder Strap Carrying System: Using a shoulder strap or carrying system helps distribute the weight of the equipment, enhancing operator comfort and maneuverability.

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°.

Cutting Edges & Blades Selection Chart: Consult this chart to aid in selecting the appropriate cutting head or blade for your STIHL trimmer or brushcutter.

Fully Lines Drive Shaft: The fully lined drive shaft ensures smooth operation and minimal vibration.

High Tech Polymer Housing: Housings constructed from lightweight materials provide superior impact resistance and corrosion resistance.

Throttle Trigger Interlock: The throttle trigger interlock must be engaged before the trigger can be activated, ensuring operational safety.

Air Filter Cover: The air filter cover can be easily removed for rapid and trouble-free filter cleaning or replacement.

Protected Choke Lever Knob: This safeguarding feature helps prevent damage to the choke lever.

Protected Spark Plug: The spark plug is both safeguarded and designed for easy replacement.

Protected Spark Arrestor Muffler: Large baffles integrated into the spark arrestor muffler reduce noise levels, and a screen is included to minimize spark emissions.

Trimmer Line: High-performance STIHL trimmer line is available for various operating conditions.

Gearbox Attachments: Gearbox attachments are available for this model. Refer to the interchangeable gearbox chart to determine which attachments work with this model.

Straps and Harnesses: Straps and harnesses distribute the equipment's weight from your hands to your shoulders, reducing operator fatigue and enabling easier use for extended periods.

Trimmer Heads & Blades: Multiple trimmer heads and blades are available. Consult this chart to determine which ones are compatible with this model.

Protected or Enclosed Control Cables: This design eliminates loose and dangling control cables.

Heavy Duty Steel-on-Steel Clutch: The centrifugal clutch is engineered to minimize slippage.

Convenient Throttle Start/Run/Stop Controls Built into Handle: Controls are conveniently integrated into the handle for easy operation.

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. The soft grips enhance comfort, provide greater control, and reduce operator fatigue.

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

Anti-Vibration System: STIHL has developed 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.