Description:

STIHL® engine technology means low fuel consumption, longer run times, and reduced exhaust emissions in this high-powered chainsaw. The MS 391 features STIHL® engine technology that improves fuel efficiency while reducing exhaust emissions, compared to other chainsaw models. Though equal in weight, the MS 391 is more powerful than the MS 311. Add to that an optimal power-to-weight ratio, and you have a chainsaw that’s built for big jobs in the field, on the farm, and around the ranch. Felling trees, cutting firewood, and post-storm cleanup just got a whole lot easier with the rugged STIHL® MS 391.

Features:

• IntelliCarb™ Compensating Carburetor – The IntelliCarb™ Compensating Carburetor automatically adjusts the air/fuel ratio to maintain optimal engine RPM when the air filter becomes restricted or partially clogged. Unlike typical carburetors that draw air from the “dirty” side of the air filter, IntelliCarb™ uses clean-side air to control the diaphragm and fuel flow, improving performance and reliability.
• Bumper Spikes – Designed to prevent pull-in and provide enhanced control, bumper spikes make cutting easier and more stable, especially in challenging conditions.
• Toolless Fuel and Oil Caps with Retainers – No tools needed. Simply lift the lever and twist to remove or secure the caps. The integrated retainers prevent cap loss during refueling or oiling.
• Pre-Separation Air Filtration System – This innovative system increases air filter life by using centrifugal force to eject heavier debris before it reaches the air filter, reducing maintenance intervals and improving engine efficiency.
• Side-Access Chain Tensioner – For quicker, easier chain adjustments, the side-access chain tensioner allows users to fine-tune chain tension using a bar wrench rather than adjusting from the front.
• STIHL® Anti-Vibration System – The STIHL® anti-vibration system minimizes vibration levels in handheld power equipment, reducing operator fatigue and enhancing user comfort over extended periods of use.
• Master Control Lever™ – A single, user-friendly lever that operates the choke, starting throttle lock, and on-off switch. The throttle trigger must be pulled before the Master Control Lever™ can be moved to the choke position—an added safety feature.
• Throttle Trigger Lockout – Enhances operator safety by requiring the lockout to be engaged before the throttle can be activated.
• High-Tech Polymer Housings – Lightweight, durable, and corrosion-resistant, these housings offer robust protection for internal components without adding unnecessary weight.

Specification:

• Power Source: Gas
• Powerhead Weight: 13.7 lbs.
• Recommended Guide Bar Length: 20 in.
• Chain Type: 3/8" RS3 (OILOMATIC®)
• Chain Oil Capacity: 11.8 oz.
• Engine Power: 4.4 bhp
• Fuel Capacity: 20.3 oz.
• Displacement: 64.1 cc
• Intended Use: Farm/Ranch