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Stihl MS 661 Magnum 25 in. Light
Stihl MS 661 Magnum 25 in. Light

Specs

General Information

Manufacturer
Stihl
Stihl
Model
MS 661 Magnum 25 in. Light
MS 661 Magnum 25 in. Light
Model Code
11442000434
11442000434
Color
Orange / White
Orange / White

Dimensions

Weight
Powerhead - 16.5 lb. (7.5 kg)
Powerhead - 16.5 lb. (7.5 kg)

Engine

Horsepower
7.2 bhp (5.4 kW)
7.2 bhp (5.4 kW)
Displacement
91.1 cc (5.56 cu. in.)
91.1 cc (5.56 cu. in.)
Fuel Type
Gas
Gas
Fuel Tank Capacity
850 cc (28.7 oz.)
850 cc (28.7 oz.)
Oil Capacity
400 cc (13.5 oz.)
400 cc (13.5 oz.)

Operational

Chain
OILOMATIC® 3/8 in. 33RS
OILOMATIC® 3/8 in. 33RS
Guide Bars
Length - 25 in. Light 2231
Length - 25 in. Light 2231

Other

Miscellaneous
STIHL recommends #3624 (33 RS3 84) OILOMATIC® saw chain and 25" 3003 000 4030 Ematic™ guide bar combination. Compatible guide bar ranges: 16 in. to 36 in.
STIHL recommends #3624 (33 RS3 84) OILOMATIC® saw chain and 25" 3003 000 4030 Ematic™ guide bar combination. Compatible guide bar ranges: 16 in. to 36 in.

Features

Features

  • 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.
  • STIHL ELASTOSTART™: The ElastoStart™ starter handle is an exclusive feature of STIHL. It is a starting grip with a built-in shock absorber that helps reduce the effort when pulling on the starter cord. The ElastoStart™ starter grip noticeably reduces the sudden peak forces (compression) normally felt during cranking. The forces which occur at the grip after the first compression stroke are smoothed out.
  • 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.
  • FUEL AND OIL CAPS WITH RETAINERS: The fuel and oil cap retainers keep the caps attached to the unit for added convenience.
  • ADJUSTABLE AUTOMATIC OILER: The Adjustable Automatic Oiler allows the user to adjust the lubricant of the guide bar and saw chain for different bar lengths and cutting conditions.
  • DECOMPRESSION VALVE: The decompression valve, also referred to as 'deco' or 'deco valve', vents compression in the cylinder for easier starting. The decompression valve temporarily reduces the compression in the combustion chamber during cranking and helps reduce the effort needed to pull the starter rope. It is opened manually and closes automatically as soon as the engine fires.
  • HD2 AIR FILTER: The new HD2 air filter on this unit is washable, providing extremely long filter life and lowering maintenance costs. The large surface area allows for longer run times between cleanings and high performance even while operating in dusty and dry conditions. Overall, the HD2 air filter provides better protection of the engine compared to standard air filters.

Features

  • 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.
  • STIHL ELASTOSTART™: The ElastoStart™ starter handle is an exclusive feature of STIHL. It is a starting grip with a built-in shock absorber that helps reduce the effort when pulling on the starter cord. The ElastoStart™ starter grip noticeably reduces the sudden peak forces (compression) normally felt during cranking. The forces which occur at the grip after the first compression stroke are smoothed out.
  • 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.
  • FUEL AND OIL CAPS WITH RETAINERS: The fuel and oil cap retainers keep the caps attached to the unit for added convenience.
  • ADJUSTABLE AUTOMATIC OILER: The Adjustable Automatic Oiler allows the user to adjust the lubricant of the guide bar and saw chain for different bar lengths and cutting conditions.
  • DECOMPRESSION VALVE: The decompression valve, also referred to as 'deco' or 'deco valve', vents compression in the cylinder for easier starting. The decompression valve temporarily reduces the compression in the combustion chamber during cranking and helps reduce the effort needed to pull the starter rope. It is opened manually and closes automatically as soon as the engine fires.
  • HD2 AIR FILTER: The new HD2 air filter on this unit is washable, providing extremely long filter life and lowering maintenance costs. The large surface area allows for longer run times between cleanings and high performance even while operating in dusty and dry conditions. Overall, the HD2 air filter provides better protection of the engine compared to standard air filters.