Description
Bicycle-handle brush cutters are too wide and clumsy to maneuver between tight cemetery headstones and residential air conditioner units. The Stihl FS 251 R Trimmer Gas Powered with Loop Handle delivers heavy-displacement brush-cutting torque in a compact loop-handle configuration. It carries a 41.6 cc commercial engine. Heavy engine weight requires push-pull arm strength during long shifts.
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.
Compact Loop Handle Heavy Trimming Platform
The compact loop handle allows operators to tilt and twist the cutting head around tight obstacles where wide bicycle bars cannot fit. The high-displacement engine powers through thick weeds without bogging down.
- 41.6 cc commercial two-stroke engine delivers 2.2 net Horsepower for continuous heavy brush clearing.
- Compact loop handle design enables tight maneuvering around obstacles and narrow garden paths.
- Solid steel splined drive shaft withstands extreme shock loads when striking hidden rocks or curbs.
- 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.
- Heavy-duty barrier bar prevents the operator from stepping into the cutting head envelope.
Combustion Engine Load Bench Telemetry
Spinning heavy 0.105-inch line through dense pasture weeds drops the 41.6 cc engine to 7900 RPM while fuel burn averages 0.40 GPH. Angle gear case temperature stabilizes at 140°F after 45 minutes of heavy field trimming. Engine mechanical power delivery measures 1.6 kW under continuous weed load. Sound pressure registers 95 dBA at the operator ear position.
Commercial Grounds Trimming Field Directives
Commercial landscapers, cemetery caretakers, and municipal park staff clear thick overgrown vegetation fast with this loop-handle power plant. Do not use this trimmer without the barrier bar installed because the bar prevents feet from contacting the spinning head. Never run the engine without high-grade 50 to 1 two-stroke oil pre-mix.
- Clean grass clippings and mud from the engine cooling fins and starter housing after each shift.
- Pump high-temperature gear grease into the lower gear case plug hole every 25 hours of use.
- Inspect the fuel filter pickup inside the tank and replace the fuel line filter every 100 run hours.
Equipment Guarantee Commercial Delivery Manifest
Stihl covers this commercial trimmer 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 R trimmer, AutoCut line head, loop handle with barrier bar, combo tool, and safety glasses.
