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Stihl MS 391 Chainsaw
Stihl MS 391 Chainsaw

Specs

General Information

Manufacturer
Stihl
Stihl
Model
MS 391 Chainsaw
MS 391 Chainsaw
Model Code
MS391
MS391
Color
Orange / White
Orange / White

Dimensions

Weight
Powerhead - 13.67 lb. (6.2 kg)
Powerhead - 13.67 lb. (6.2 kg)

Engine

Horsepower
3.3 kW (4.4 bhp)
3.3 kW (4.4 bhp)
Displacement
64.1 cc (3.9 ci)
64.1 cc (3.9 ci)
Fuel Type
Gas
Gas
Fuel Tank Capacity
20.3 oz. (600 cc)
20.3 oz. (600 cc)
Oil Capacity
Chain - 11.8 oz. (350 cc)
Chain - 11.8 oz. (350 cc)

Operational

Chain
OILOMATIC® 3/8 in. RS3
OILOMATIC® 3/8 in. RS3
Guide Bars
Recommended ranges - 16 - 20 in. (40 - 50 cm)
Recommended ranges - 16 - 20 in. (40 - 50 cm)

Other

Warranty

Personal, Professional, or Household use - 1 Year

Professional Use - 3 months

Personal, Professional, or Household use - 1 Year

Professional Use - 3 months

Features

Features

  • BUILT IN THE USA: When you own a STIHL, you hold in your hands the product of hard work, pride and dedication.
  • REDUCED-EMISSION ENGINE TECHNOLOGY - CARING FOR NATURE: The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards.
  • PRE-SEPARATION AIR FILTRATION SYSTEM: This time-saving technology boosts the efficiency of the engine’s filter system, doubling the time between air filter cleanings. Air drawn into the engine is first separated via centrifugal force, ejecting the heavier dirt particles before being routed to the air filter. This pre-separation means less dirt to be captured by the air filter, resulting in less frequent cleaning and maintenance.
  • ANTI-VIBRATION SYSTEM: STIHL has developed a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
  • INTELLICARB™ COMPENSATING CARBURETOR: The IntelliCarb™ Compensating Carburetor is designed to automatically adjust the air/fuel ratio when the air filter becomes restricted or partially clogged and maintains the engine’s correct RPM. IntelliCarb™ uses air from the clean side of the air filter to control the diaphragm and flow of fuel. As the air filter becomes dirty and less air is available for the carburetor, the IntelliCarb™ system adjusts the fuel flow to compensate for the decrease in air flow. This is in contrast to typical carburetors that utilize this air from the “dirty” side of the air box.
  • SIDE-ACCESS CHAIN TENSIONER: The side-access chain tensioner makes it much more convenient for the user to adjust the saw chain with a bar wrench as opposed to the typical location of the guide bar adjustment screw.
  • TOOLLESS FUEL AND OIL CAPS WITH RETAINERS: Simply lift the lever and twist the caps to remove or tighten. There‘s no need to use a tool to tighten or loosen.
  • STIHL OILOMATIC® SAW CHAIN: STIHL makes its own saw chain.
  • EMATIC™ BAR: Includes a polymer ramp reservoir which holds bar oil until it can be picked up by passing chain. This can reduce oil usage by up to 50%.
  • BUMPER SPIKES: Help prevent pull-in and provide better control, making cutting easier.
  • SPARK ARRESTER MUFFLER: Has large baffles which reduce noise level and contain a screen designed to reduce the emission of sparks.
  • STIHL QUICKSTOP® CHAIN BRAKE SYSTEM: Designed to stop the chain in fractions of a second. Can be manually activated or activated by inertia if the kickback force is sufficient.
  • FRONT HAND GUARD: Designed to reduce the risk of injury.
  • FRONT HANDLE: Designed for a secure grip and ergonomically angled for comfort.
  • PROTECTED SPARK PLUG: Protected, yet easy to change.
  • LARGE STARTING HANDLE: Easy to grip.
  • SMOOTH CLEAN DESIGN: No rough edges to snag on clothing or brush.
  • AIR FILTER COVER: Easy to remove for fast and easy filter cleaning or replacement.
  • MASTER CONTROL LEVER™: A single lever operating the choke, starting throttle lock and on-off switch.
  • REAR HAND GUARD: Reduces the risk of injury as well as provides a wide area for foot placement during starting.
  • HIGH-TECH POLYMER HOUSINGS: Lightweight, withstand greater impact and are corrosion-resistant.
  • TRANSLUCENT FUEL TANK: Allows operator to easily check fuel level before starting work.
  • ANTI-VIBRATION SYSTEM: Helps reduce operator fatigue.
  • ELECTRONIC IGNITION: Provides easier starting and smoother running.
  • REPLACEABLE "IN TANK" FUEL AND OIL FILTERS: Lower cost and are easy to maintain.
  • INBOARD CHAIN BRAKE: Requires less maintenance and makes saw chain sprocket easier to remove.
  • AUTOMATIC BAR AND CHAIN OILER: Lets operator concentrate on cutting, not on bar lubrication.
  • CHAIN CATCHER: Helps reduce the risk of operator contact by a chain if it should break or derail.
  • THROTTLE TRIGGER LOCKOUT: Must be depressed before the trigger can be activated.
  • *NOTE: STIHL chainsaws have many common features. However, all models may not have all features shown here. Consult your Dealer for details.

Other Features

  • INTELLICARB™ COMPENSATING CARBURETOR: Measures air on clean side of air filter and adjusts metering diaphragm in carburetor. Keeps RPM levels even when filter begins to clog.
  • DECOMPRESSION VALVE: Makes starting easier.
  • EASY2START™ SYSTEM: This starting system reduces the strength and effort needed to start the engine.
  • STIHL QUICKSTOP® PLUS (Q) - AN ADDITIONAL CHAIN BRAKING FEATURE: Designed to activate when you completely release the rear handle. Designed to stop the chain within one second.
  • PURGE PUMP PRIMER: Lets you prime the carburetor without flooding it. Standard on select models.
  • STIHL M-TRONIC™: Electronically optimizes the fuel mixture over the whole RPM — ensuring top performance and efficiency under varying conditions.
  • ELASTOSTART™ HANDLE: Has built-in shock absorber for smoother starting.
  • QUICK CHAIN ADJUSTER: A toolless chain adjuster.
  • CAPTURED GUIDE BAR NUTS: Secure the guide bar and sprocket cover.

Features

  • BUILT IN THE USA: When you own a STIHL, you hold in your hands the product of hard work, pride and dedication.
  • REDUCED-EMISSION ENGINE TECHNOLOGY - CARING FOR NATURE: The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards.
  • PRE-SEPARATION AIR FILTRATION SYSTEM: This time-saving technology boosts the efficiency of the engine’s filter system, doubling the time between air filter cleanings. Air drawn into the engine is first separated via centrifugal force, ejecting the heavier dirt particles before being routed to the air filter. This pre-separation means less dirt to be captured by the air filter, resulting in less frequent cleaning and maintenance.
  • ANTI-VIBRATION SYSTEM: STIHL has developed a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
  • INTELLICARB™ COMPENSATING CARBURETOR: The IntelliCarb™ Compensating Carburetor is designed to automatically adjust the air/fuel ratio when the air filter becomes restricted or partially clogged and maintains the engine’s correct RPM. IntelliCarb™ uses air from the clean side of the air filter to control the diaphragm and flow of fuel. As the air filter becomes dirty and less air is available for the carburetor, the IntelliCarb™ system adjusts the fuel flow to compensate for the decrease in air flow. This is in contrast to typical carburetors that utilize this air from the “dirty” side of the air box.
  • SIDE-ACCESS CHAIN TENSIONER: The side-access chain tensioner makes it much more convenient for the user to adjust the saw chain with a bar wrench as opposed to the typical location of the guide bar adjustment screw.
  • TOOLLESS FUEL AND OIL CAPS WITH RETAINERS: Simply lift the lever and twist the caps to remove or tighten. There‘s no need to use a tool to tighten or loosen.
  • STIHL OILOMATIC® SAW CHAIN: STIHL makes its own saw chain.
  • EMATIC™ BAR: Includes a polymer ramp reservoir which holds bar oil until it can be picked up by passing chain. This can reduce oil usage by up to 50%.
  • BUMPER SPIKES: Help prevent pull-in and provide better control, making cutting easier.
  • SPARK ARRESTER MUFFLER: Has large baffles which reduce noise level and contain a screen designed to reduce the emission of sparks.
  • STIHL QUICKSTOP® CHAIN BRAKE SYSTEM: Designed to stop the chain in fractions of a second. Can be manually activated or activated by inertia if the kickback force is sufficient.
  • FRONT HAND GUARD: Designed to reduce the risk of injury.
  • FRONT HANDLE: Designed for a secure grip and ergonomically angled for comfort.
  • PROTECTED SPARK PLUG: Protected, yet easy to change.
  • LARGE STARTING HANDLE: Easy to grip.
  • SMOOTH CLEAN DESIGN: No rough edges to snag on clothing or brush.
  • AIR FILTER COVER: Easy to remove for fast and easy filter cleaning or replacement.
  • MASTER CONTROL LEVER™: A single lever operating the choke, starting throttle lock and on-off switch.
  • REAR HAND GUARD: Reduces the risk of injury as well as provides a wide area for foot placement during starting.
  • HIGH-TECH POLYMER HOUSINGS: Lightweight, withstand greater impact and are corrosion-resistant.
  • TRANSLUCENT FUEL TANK: Allows operator to easily check fuel level before starting work.
  • ANTI-VIBRATION SYSTEM: Helps reduce operator fatigue.
  • ELECTRONIC IGNITION: Provides easier starting and smoother running.
  • REPLACEABLE "IN TANK" FUEL AND OIL FILTERS: Lower cost and are easy to maintain.
  • INBOARD CHAIN BRAKE: Requires less maintenance and makes saw chain sprocket easier to remove.
  • AUTOMATIC BAR AND CHAIN OILER: Lets operator concentrate on cutting, not on bar lubrication.
  • CHAIN CATCHER: Helps reduce the risk of operator contact by a chain if it should break or derail.
  • THROTTLE TRIGGER LOCKOUT: Must be depressed before the trigger can be activated.
  • *NOTE: STIHL chainsaws have many common features. However, all models may not have all features shown here. Consult your Dealer for details.

Other Features

  • INTELLICARB™ COMPENSATING CARBURETOR: Measures air on clean side of air filter and adjusts metering diaphragm in carburetor. Keeps RPM levels even when filter begins to clog.
  • DECOMPRESSION VALVE: Makes starting easier.
  • EASY2START™ SYSTEM: This starting system reduces the strength and effort needed to start the engine.
  • STIHL QUICKSTOP® PLUS (Q) - AN ADDITIONAL CHAIN BRAKING FEATURE: Designed to activate when you completely release the rear handle. Designed to stop the chain within one second.
  • PURGE PUMP PRIMER: Lets you prime the carburetor without flooding it. Standard on select models.
  • STIHL M-TRONIC™: Electronically optimizes the fuel mixture over the whole RPM — ensuring top performance and efficiency under varying conditions.
  • ELASTOSTART™ HANDLE: Has built-in shock absorber for smoother starting.
  • QUICK CHAIN ADJUSTER: A toolless chain adjuster.
  • CAPTURED GUIDE BAR NUTS: Secure the guide bar and sprocket cover.