Description
Handheld string trimmers bog down and wrap stems when cutting dense woody weeds, berry vines, and thick brush along property boundaries. The Stihl FS 251 Z Gas Powered Brush Cutter with Bike Handle cuts tough woody saplings and heavy field brush with continuous gas torque. It carries a 41.6 cc commercial engine. Heavy clearing requires wearing the included full shoulder harness.
A commercial 41.6 cc two-stroke engine features a stratified scavenging cylinder design that boosts torque while lowering exhaust emissions. The rigid solid steel drive shaft runs inside an aluminum tube supported by self-lubricating rubber-isolated bushings to dampen vibration. The heavy-duty angle gear head features spiral bevel gears running inside a die-cast magnesium case packed with high-temperature gear grease.
Heavy Brush Clearing Hardware Matrix
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.
- 41.6 cc commercial two-stroke engine delivers 2.2 net Horsepower for continuous heavy brush clearing.
- 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.
- High-capacity transparent fuel tank holds 25.4 fluid ounces of pre-mix fuel for extended run intervals.
- Four-point anti-vibration system uses steel springs to isolate engine flutter from operator hands.
- Included double-shoulder harness distributes machine weight evenly across shoulders and hips.
Combustion Engine Load Bench Telemetry
Slicing through 1-inch thick woody briars with a steel brush blade pulls the 41.6 cc engine to 7800 RPM while fuel burn averages 0.42 GPH. Angle gear case temperature stabilizes at 142°F after 45 minutes of heavy field brush clearing. Engine mechanical power delivery measures 1.6 kW under continuous branch cutting load. Sound pressure registers 96 dBA at the operator ear position.
Brush Clearing Scope Maintenance Protocols
Commercial land clearing crews, highway verge mowers, and estate 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.
- Clean wood fibers and weed wrap from around the lower blade arbor after each work shift.
Equipment Guarantee Commercial Delivery Manifest
Stihl covers this commercial brushcutter with a 2-Year commercial warranty covering the two-stroke engine block, drive shaft, and gear drive head. The shipping carton contains the FS 251 Z brushcutter, steel brush knife blade, full shoulder harness, combo tool, and safety glasses.
