STIHL FS 91 R 16.5 in. Gas String Trimmer

Product Description

The STIHL FS 91 R 16.5 in. Gas String Trimmer is a commercial-grade, heavy-duty landscaping tool engineered to deliver relentless cutting performance for professionals and demanding landowners alike. Designed by STIHL , this professional walk-behind brush and grass trimmer combines extreme torque with day-long operational endurance.

Powered by a fuel-efficient, high-output low-emission engine, it effortlessly tears through thick weeds, dense roadside overgrowth, and tough structural turf. Built around a rugged, solid-steel drive shaft and an ergonomic loop-handle design, this trimmer offers maximum agility in tight spaces, making it the definitive platform for sculpting clean fence lines, navigating steep ditches, and maintaining sprawling properties. Engineered to withstand the daily punishment of commercial landscaping crews, the FS 91 R features impact-resistant, lightweight polymer housings that are completely impervious to rust and corrosion. A sophisticated, built-in multi-point anti-vibration system isolates the operator from engine fatigue, ensuring exceptionally smooth handle operation during multi-hour jobs. Its high-capacity cutting head features a wide 16.5-inch cutting swath to maximize ground coverage per pass, while the specialized large-baffle muffler reduces acoustic noise and incorporates an integrated spark-arrestor screen to prevent field fires.

Built for buyers comparing walk-behind lawn mowers options, this model combines its core specifications with a practical design intended for straightforward setup, operation, and maintenance. Review the technical details below to confirm compatibility with your intended application before purchase.

Key Features

• Gas String Trimmer is a commercial-grade, heavy-duty landscaping tool engineered to deliver relentless cutting performance for professionals and demanding landowners alike.
• Designed by STIHL , this professional walk-behind brush and grass trimmer combines extreme torque with day-long operational endurance.
• Powered by a fuel-efficient, high-output low-emission engine, it effortlessly tears through thick weeds, dense roadside overgrowth, and tough structural turf.
• A sophisticated, built-in multi-point anti-vibration system isolates the operator from engine fatigue, ensuring exceptionally smooth handle operation during multi-hour jobs.
• Key Features: Commercial-Grade Gas Engine: Delivers massive, low-end torque with lower emissions and reduced fuel consumption to conquer thick, dense brush.
• Wide 16.5-Inch Cutting Footprint: Optimizes ground coverage per sweep, significantly reducing tracking time on expansive properties.
• Anti-Vibration Engineering: Drastically cuts down operator fatigue by absorbing mechanical engine cycles for ultra-smooth handling.
• Corrosion-Resistant Housings: Constructed from advanced, lightweight polymers engineered to endure heavy jobsite drops and impact.

Technical Specifications

Specifications are based on the product information available in this listing. Refer to the manufacturer documentation for model-specific installation, operating, and compatibility requirements.

What’s Included

• Main mower / lawn tractor unit
• Factory battery system as specified for the model
• Factory-installed cutting deck and blade system
• Owner / operator documentation

Ideal For

• Residential lawn maintenance
• Routine seasonal mowing
• Homeowners seeking efficient outdoor power equipment

Care & Maintenance

• Follow the manufacturer’s operating, installation, and maintenance instructions.
• Inspect the product and all safety-related components before use.
• Keep the product clean and store or operate it only under appropriate conditions.
• Use compatible replacement parts, accessories, fluids, batteries, or fuel as applicable.

3-Year Limited Store Warranty

This product is covered by our 3-Year Limited Store Warranty from the original date of purchase. Coverage applies to eligible defects in materials or workmanship under normal intended use, subject to the store warranty terms and product eligibility.

Warranty coverage does not include normal wear, consumable parts, misuse, abuse, accidental damage, improper installation or maintenance, unauthorized modifications, improper storage, commercial abuse where not intended, or damage caused by failure to follow manufacturer instructions.

If warranty service is required, retain your order information and contact customer support with the product model, purchase details, and a clear description of the issue.