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Stihl MS 251 Wood Boss 18 in.
Stihl MS 251 Wood Boss 18 in.

Specs

General Information

Manufacturer
Stihl
Stihl
Model
MS 251 Wood Boss 18 in.
MS 251 Wood Boss 18 in.
Model Code
11432000492
11432000492
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 cu. in.)
45.6 cc (2.78 cu. in.)
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
Length - 18 in. (45 cm) STIHL ROLLOMATIC®
Length - 18 in. (45 cm) STIHL ROLLOMATIC®

Other

Miscellaneous
STIHL recommends #3634 (26 RM3 68) OILOMATIC® saw chain and 18 in. 3005 008 4717 STIHL ROLLOMATIC® E guide bar combination
STIHL recommends #3634 (26 RM3 68) OILOMATIC® saw chain and 18 in. 3005 008 4717 STIHL ROLLOMATIC® E guide bar combination

Features

Common Features

  • 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: 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.

Model Features

  • BUILT IN THE USA: A majority of STIHL gasoline-powered units sold in the United States are built in the United States from domestic and foreign parts and components.
  • 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.

Common Features

  • 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: 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.

Model Features

  • BUILT IN THE USA: A majority of STIHL gasoline-powered units sold in the United States are built in the United States from domestic and foreign parts and components.
  • 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.