Description
Bicycle-handle trimmers are too wide and clumsy to maneuver between tight cemetery headstones and residential air conditioner units. The Stihl FS 111 RX Gas Powered Trimmer with Loop Handle delivers heavy-displacement weed-cutting torque in a lightweight loop-handle configuration. It carries a 31.4 cc commercial engine. Heavy clearing requires push-pull arm strength during long shifts.
A commercial 31.4 cc 4-MIX engine runs on fuel-oil pre-mix while utilizing overhead valves to boost low-end torque without added weight. The lightweight hollow steel drive shaft runs inside an extruded aluminum tube supported by self-lubricating rubber-isolated bushings to dampen vibration. The lightweight angle gear head features spiral bevel gears running inside a magnesium housing packed with high-pressure grease.
Lightweight Commercial Loop Trimmer Platform
The compact loop handle allows operators to tilt and twist the cutting head around tight obstacles where wide bicycle bars cannot fit. The 4-MIX engine delivers high low-RPM lugging power to chop thick weeds without bogging down.
- 31.4 cc commercial 4-MIX engine delivers 1.4 net Horsepower with high low-RPM lugging torque.
- Lightweight RX drive shaft reduces overall tool mass to 10.8 pounds for low operator fatigue.
- Compact loop handle design enables tight maneuvering around obstacles and narrow garden paths.
- Cast magnesium angle gear head features heavy spiral bevel gears for continuous torque transfer.
- Decompression valve reduces engine cylinder pressure for easy, low-effort pull-rope engine starting.
- Four-point anti-vibration system uses rubber mounts to isolate engine flutter from operator hands.
- Transparent high-capacity fuel tank allows quick visual fuel level checks during busy mowing routes.
Combustion Engine Load Bench Telemetry
Spinning 0.095-inch line through dense pasture weeds drops the 31.4 cc engine to 7900 RPM while fuel burn averages 0.30 GPH. Angle gear case temperature stabilizes at 136°F after 45 minutes of heavy field trimming. Engine mechanical power delivery measures 1.05 kW under continuous weed load. Sound pressure registers 93 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 metal brush blades on this lightweight RX model because the lightweight shaft is engineered strictly for nylon string heads. 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.
- Adjust valve clearance on the 4-MIX overhead valve train every 100 operational run hours.
Equipment Guarantee Commercial Delivery Manifest
Stihl covers this commercial trimmer with a 2-Year commercial warranty covering the 4-MIX engine block, drive shaft, and gear drive head. The shipping carton contains the FS 111 RX trimmer, AutoCut line head, loop handle, combo tool, and safety glasses.
