The STIHL MS 271 FARM BOSS® with a 20" guide bar delivers the power and efficiency needed for firewood cutting, property maintenance and other demanding wood-cutting tasks. Its fuel-efficient engine provides 20% longer run times than the previous model, allowing you to spend more time cutting and less time stopping to refuel.
Built for tough jobs, the MS 271 FARM BOSS® combines dependable performance with features designed to enhance comfort and convenience. An advanced anti-vibration system helps reduce operator fatigue during extended use, while the compact, ergonomic design provides excellent handling and control. Toolless fuel and oil caps with retainers make refueling quick and easy while helping prevent misplaced caps.
The pre-separation air filtration system removes larger debris before it reaches the air filter, helping the filter last up to five times longer and reducing maintenance downtime. Side-mounted chain tensioning further simplifies adjustments, making it easier to keep the saw performing at its best. With a combination of power, efficiency and user-friendly features, the MS 271 FARM BOSS® 20" is ready to help you take on demanding jobs with confidence.
Packaged 2 per box
3.06 cu. in. (50.2 cc), 3.5 bhp (2.6 kW)
Fuel Capacity: 500 cc (16.9 oz.)
Chain Oil Capacity: 240 cc (8.12 oz.)
Guide Bar Lengths: Guide Bar Lengths: 40 to 50 cm (16" to 20") STIHL FARM BOSS®
Bar length: 20"
Guide bar part #: 3003 812 3321
Chain: 23 RM3 (RAPID Micro 3)
Bar length: 20 in
Device weight without refuelling: 12.4 lb
System weight without refuelling: 14.8 lb
Displacement: 3.1 in³
Device length with bumper spike: 17.7 in
Engine power: 3.50 bhp
Power-to-weight ratio: 3.6 lb/hp
Saw chain pitch: .325"
Cutting System & Bar Selection
Original STIHL Light 04 slim profile guide bars and low-kickback micro semi-chisel chains.
3/8" Standard Conversion AdvisoryOEM Fitment Requirement
The MS 261 comes equipped from the factory with a .325" clutch rim sprocket. Running 3/8" bar & chain requires pairing this matching 3/8"-7T rim sprocket on your clutch drum to ensure correct drive pitch.
Modular 60-Second Install: Slides directly onto your factory clutch drum (no drum or clutch replacement needed).
Files cutters and lowers depth gauges simultaneously in a single stroke. Universal precision sharpening for all .325" pitch chains across 16", 18", and 20" bars.
36" overall length (Standard most popular fit for 5'6"–6'0"). 9-ply heavy duty Engtex Avertic Pro ballistic cut-retardant material. Meets OSHA 1910.266 logging requirements.
California Proposition 65
