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Technical details

Bar length50-90 cm
Bar length20-36 in
Displacement91 (cc)
Displacement6 cu-in
Power output5.3-5.4 / 7.3 (kW/bhp)


The pictures shown are sample photos. The actual appearance of the equipment features and their specific attachment to the product may differ from the pictorial representations, but will have the same functionality.

Professional chain saw

The STIHL MS 661 C-M professional chainsaw is a real powerhouse, offering strong and consistent performance. It combines cutting-edge technology with an optimum power-to-weight ratio of 1.4 kg/kW and is ideal for particularly tough and demanding forestry applications. Even thick wood can be processed effectively and quickly using this gas-driven chainsaw.

The chainsaw is powered by a 5.4 kW (7.3 hp) STIHL 2-MIX engine, which ensures a consistently high performance thanks to STIHL M-Tronic. The controlled-delivery oil pump reliably supplies the cutting attachment with oil and enables the use of long and very long cutting attachments.

The STIHL MS 661 C-M gas-driven chainsaw is also used as a competition saw in the STIHL TIMBERSPORTS® series. Other features of the STIHL MS 661 C-M chainsaw:

  • the HD2 air filter removes even the finest dust from the air, and is easy to clean using STIHL VarioClean. In a video guide, we demonstrate the cleaning process.
  • The STIHL anti-vibration system enables you to work comfortably and protects your muscles and joints.

Tool-free fuel caps save you time and effort when filling the chainsaw.

MS 661 C-M

Service & tips