| Displacement | 1.7 in³ |
| Displacement | 1.7 cu-in |
| Power | 1.3 BHP |
| Power | 1.273 BHP |
| Device weight without refuelling | 12 lb 1) |
The pictures shown are sample photos. The actual appearance of the equipment features and their specific attachment to the product may differ from the pictorial representations, but will have the same functionality.
The STIHL FS 91 R delivers the power and versatility professionals need for large areas, long grass, and demanding landscape maintenance tasks. Its high-torque STIHL 4-MIX® engine is built to handle tough trimming and clearing applications, while the loop-handle design provides greater freedom of movement and excellent maneuverability around trees, shrubs, and other obstacles.
A padded double shoulder harness helps reduce fatigue during extended use, while the multi-function handle keeps controls within easy reach. One-Touch Stop and a semi-automatic choke lever make operation and restarting simple. The vertical pleated paper air filter helps extend engine life, and the TapAction™ AutoCut® 27-2 cutting head allows for quick line advancement with a simple tap.
Note: Not available for purchase or delivery in California.

Improper use of any power tool may cause serious or fatal injury. Read, understand, and follow carefully the operating and safety instructions in your instruction manual before using such products. STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only. Improper use of any power tool may cause serious or fatal injury. Read, understand, and follow carefully the operating and safety instructions in your instruction manual before using such products. STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.
E-10 StatementNote: STIHL recommends use of fuel with no more than 10% Ethanol content. Using fuel with greater than 10% Ethanol content may cause damage to your equipment and may void your STIHL warranty.
Proposition 65 - EnglishThis product contains chemicals known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov