Description
Standard brush trimmers bog down and smoke clutches when clearing thick woody saplings and dense briar thickets along right-of-ways. The Stihl FS 311 Brush Cutter Gas Powered with Bike Handle uses a high-displacement 4-MIX engine to deliver massive low-RPM cutting torque. It carries a 36.3 cc engine. Prolonged brush clearing requires wearing the included full double-shoulder harness.
The power unit features a patented Stihl 4-MIX engine running on fuel-oil pre-mix while utilizing overhead valves to boost low-end torque without added weight. A rigid solid steel drive shaft runs inside an extruded aluminum tube supported by self-lubricating rubber-isolated bushings. The heavy-duty angle gear head features spiral bevel gears running inside a cast magnesium housing packed with high-pressure grease.
Commercial Brush Clearing Hardware Framework
Bicycle-style handlebars give operators superior sweeping leverage across wide hillsides and overgrown fence lines without back strain. The multi-function control handle puts throttle control, ignition kill, and start locks right under the thumb.
- 36.3 cc commercial 4-MIX engine delivers 1.9 net Horsepower with high low-RPM lugging torque.
- Bicycle-style handlebar frame provides superior sweeping control across expansive rough fields.
- Solid steel splined drive shaft withstands extreme shock loads when striking hidden rocks or stumps.
- Cast magnesium angle gear head features heavy spiral bevel gears for continuous torque transfer.
- Four-point anti-vibration system uses steel springs to isolate engine flutter from operator hands.
- Decompression valve reduces engine cylinder pressure for easy, low-effort pull-rope engine starting.
- Included double-shoulder harness distributes machine weight evenly across shoulders and hips.
Combustion Engine Load Bench Telemetry
Slicing through 1.5-inch thick woody saplings with a steel brush knife pulls the 36.3 cc engine down to 7400 RPM with fuel burn of 0.38 GPH. Angle gear case temperature stabilizes at 140°F after 45 minutes of continuous right-of-way clearing. The 4-MIX engine delivers 1.4 kW of mechanical power under continuous branch load. Sound pressure registers 95 dBA at the operator ear position.
Right Of Way Maintenance Fleet Directives
Commercial land clearing crews, highway verge mowers, and utility groundskeepers clear overgrown trails fast with this rugged brushcutter. Do not attempt to fell trees thicker than 3 inches in diameter because sudden blade binding will bend the solid drive shaft. Never operate the machine without the steel brush blade deflector shield.
- Inspect the metal brush blade for balance, cracks, and edge sharpness before starting each clearing job.
- Pump high-temperature gear grease into the lower gear case plug hole every 25 hours of use.
- Adjust valve clearance on the 4-MIX overhead valve train every 100 operational run hours.
Commercial Warranty Equipment Shipment Roster
Stihl covers this commercial brushcutter with a 2-Year commercial warranty covering the 4-MIX engine block, drive shaft, and gear drive head. The shipping carton contains the FS 311 brushcutter, steel brush knife blade, full shoulder harness, combo tool, and safety glasses.
