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Stihl MS 251 WOOD BOSS Chainsaw
Stihl MS 251 WOOD BOSS Chainsaw

Specs

General Information

Manufacturer
Stihl
Stihl
Model
MS 251 WOOD BOSS Chainsaw
MS 251 WOOD BOSS Chainsaw
Model Code
MS251WOODBOSS
MS251WOODBOSS
Color
Orange / White
Orange / White

Dimensions

Weight
Powerhead - 10.8 lb. (4.9 kg)
Powerhead - 10.8 lb. (4.9 kg)

Engine

Horsepower
2.95 bhp (2.2 kW)
2.95 bhp (2.2 kW)
Displacement
45.6 cc (2.78 ci)
45.6 cc (2.78 ci)
Fuel Type
Gas
Gas
Fuel Tank Capacity
13.2 oz. (390 cc)
13.2 oz. (390 cc)
Oil Capacity
Chain - 6.7 oz. (198 cc)
Chain - 6.7 oz. (198 cc)

Operational

Chain
OILOMATIC® 0.325 in. RM3
OILOMATIC® 0.325 in. RM3
Guide Bars
Recommended ranges - 16 - 18 in. (40 - 45 cm)
Recommended ranges - 16 - 18 in. (40 - 45 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: Indicates products that are built in the United States from domestic and foreign parts and components.
  • 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.
  • 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.
  • MASTER CONTROL LEVER™: The Master Control Lever™ is an easy to use single lever, operating the choke, starting throttle lock and on-off switch. The operator must pull the throttle trigger before moving the Master Control Lever™ to the choke position.
  • 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:
  • FRONT HAND GUARD: 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 HANDLE: Designed to reduce the risk of injury.
  • 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: 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 a 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: Indicates products that are built in the United States from domestic and foreign parts and components.
  • 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.
  • 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.
  • MASTER CONTROL LEVER™: The Master Control Lever™ is an easy to use single lever, operating the choke, starting throttle lock and on-off switch. The operator must pull the throttle trigger before moving the Master Control Lever™ to the choke position.
  • 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:
  • FRONT HAND GUARD: 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 HANDLE: Designed to reduce the risk of injury.
  • 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: 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 a 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.