A legendary 50 cc professional chainsaw trusted by arborists, farmers, and firewood cutters, the STIHL MS 261 combines a high-revving 50.2 cc (4.0 bhp) stratified-charge engine with a lightweight 10.8 lb powerhead and 18-inch bar.
Features & Specifications
Engine & Power: 50.2 cc (4.0 bhp) professional 2-stroke engine with manual adjustable carburetor
Bar & Chain Included: 18 in. STIHL Rollomatic® E guide bar with .325 in. Rapid Micro 3 (26 RM3) chain
Professional Construction: Magnesium crankcase, captive bar nuts, decompression valve, and HD2 long-life air filter
Comfort: Spring anti-vibration system and adjustable automatic bar oiler
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
