STIHL's cutting-edge engine technology promises reduced fuel consumption, extended run times, and minimized emissions in this high-performance chainsaw. The MS 391 showcases our latest engine innovations, which enhance fuel efficiency and decrease emissions compared to previous models. Despite its equivalent weight, the MS 391 outperforms the MS 311 in terms of power. Coupled with its optimal power-to-weight ratio, this chainsaw is tailor-made for demanding tasks in the fields, farms, and ranches. Whether it's felling trees, cutting firewood, or storm cleanup, the rugged MS 391 simplifies even the most substantial jobs.
Gas, 13.67 lbs., 20" or 25" Bar, 3/8" RS3 Oilmatic Chain, 11.8 oz. Oil Capacity, 4.4 bhp, 20.3 oz. Fuel Cap., 64.1cc Discplacement
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Series Models
MS391
Gas, 13.67 lbs., 20" or 25" Bar, 3/8" RS3 Oilmatic Chain, 11.8 oz. Oil Capacity, 4.4 bhp, 20.3 oz. Fuel Cap., 64.1cc Discplacement
Item is In-Stock!
MS391 Key Features:
Pre-Separation Air Filtration System: This time-saving technology significantly enhances the efficiency of the engine's filtration system, effectively doubling the interval between air filter cleanings. Incoming air undergoes a pre-separation process using centrifugal force, which ejects the heavier dirt particles before the air reaches the filter. Consequently, the air filter captures less dirt, leading to reduced cleaning and maintenance requirements.
Anti-Vibration System: STIHL's advanced anti-vibration system is designed to minimize the vibrations generated by handheld outdoor power equipment. This system substantially reduces operator fatigue, contributing to a more comfortable working experience.
Side Access Chain Tensioner: The conveniently positioned side-access chain tensioner simplifies the process of adjusting the saw chain using a standard bar wrench, as opposed to the conventional location of the guide bar adjustment screw.
Reduced-Emission Engine Technology – Caring for Nature: STIHL Inc.'s commitment to environmentally-conscious products is symbolized by the "Caring for Nature" seal. These powered products produce zero or low exhaust emissions, surpassing EPA and/or CARB exhaust emission standards and supporting a cleaner environment.
Intellicarb Compensating Carburetor: The IntelliCarb™ Compensating Carburetor is ingeniously designed to automatically adjust the air/fuel ratio when the air filter becomes obstructed or partially clogged, maintaining the engine's correct RPM. It utilizes air from the clean side of the air filter to manage the diaphragm and fuel flow. As the air filter accumulates dirt and restricts airflow, the IntelliCarb™ system compensates by adjusting fuel flow, in contrast to conventional carburetors that draw air from the "dirty" side of the air intake.
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