Stihl FS 91 R professional gas-powered straight-shaft trimmer

🔧 Engine & Power
Engine Displacement: 28.4 cc (1.73 cu in)
Engine Power: ~0.95 kW / 1.27 bhp
Engine Type: Gas, low-emission professional engine
Fuel Tank Capacity: 710 cc (24.0 oz)
Typically uses a 2-stroke fuel mix with STIHL premix (check manual for ratio).
✂️ Cutting & Drive
Cutting Width: ~16.5 in (AutoCut/TapAction head)
Shaft Type: Straight shaft (loop handle “R” version)
Drive: Fully-lined straight drive shaft for smooth power transfer
🪶 Weight & Dimensions
Weight (dry, no cutting attachment/deflector): ~5.5 kg (12.1 lb)
Overall Length: ~1800 mm (71 in) without cutting attachment
🎛️ Features
Loop Handle (“R” model) for maneuverability in tight spots
Multi-Function Control Handle keeps all controls on one handle
TapAction™ AutoCut® Head lets you bump to advance cutting line
Superior Air Filtration & Easy Start with simplified 3-step starting
Protected Cable & Spark Arrestor Muffler for durability
⚙️ Engine Details (from manual)
Bore × Stroke: 38 mm × 25 mm
Idle Speed: ~2800 rpm
Rated Speed: ~9500 rpm
Max Output Shaft Speed: ~7150 rpm (cutting)
Fuel Primer / Carburetor: Diaphragm carburetor with integral fuel pump
If you want, I can also compare this to similar Stihl trimmers (like the FS 90 R or FS 111 R) so you can see differences in power, weight, and features.