Description
Low-displacement two-stroke trimmers bog down and smoke clutches when clearing dense ditch banks and woody weed stalks. The Stihl FS 111 Gas Powered Trimmer with Bike Handle delivers high low-end torque through a commercial 4-MIX engine to chop heavy brush. It swings a 16.5-inch cutting head. Extended clearing requires wearing the included double-shoulder harness.
The power plant features a patented Stihl 31.4 cc 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.
- 31.4 cc commercial 4-MIX engine delivers 1.4 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
Spinning heavy 0.105-inch line through dense pasture weeds drops the 31.4 cc engine to 7800 RPM while fuel burn averages 0.32 GPH. Angle gear case temperature stabilizes at 138°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 Maintenance Directives
Commercial landscapers, cemetery caretakers, and municipal park staff clear thick overgrown vegetation fast with this bike-handle power plant. Do not use this trimmer without the shoulder harness attached because machine balance requires harness suspension. 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 trimmer, AutoCut line head, double-shoulder harness, combo tool, and safety glasses.
