Description
The Stihl MS 661 C‑M petrol chainsaw is a 91 cc professional-grade saw featuring M‑Tronic, HD2 filter, ElastoStart, Ematic system, and rugged design—perfect for forestry.
Stihl MS 661 C-M Petrol Chainsaw
The Stihl MS 661 C-M petrol chainsaw is a professional-grade powerhouse engineered for heavy-duty forestry and big timber harvesting. Thanks to advanced technologies like 2‑MIX and M‑Tronic, the saw delivers robust power, reliable performance, and exceptional efficiency—making the Stihl MS 661 C‑M petrol chainsaw a top choice for forestry professionals.
High-Torque 91.1 cc Engine
This saw packs a 91.1 cc 2‑MIX engine producing a massive 5.4 kW (7.3 hp) output. Despite its power, the powerhead weighs just about 7.4 kg, which gives an excellent power-to-weight ratio of 1.4 kg/kW—ideal for removing large trees quickly and efficiently. Plus, fuel consumption is reduced by up to 20% compared to older models.
M‑Tronic Electronic Management
The integrated M‑Tronic system automatically adjusts ignition and fuel delivery in real time, responding to factors like altitude and temperature. As a result, you get fast acceleration, consistent torque, and no need for manual adjustments as conditions change.
Smooth Starts and Low Vibration
Starting is easier thanks to the decompression valve and ElastoStart handle, which reduce pull resistance. Furthermore, the anti-vibration system helps dampen handle shake during extended use—so you can work longer with less fatigue.
Heavy-Duty Filtration and Lubrication
The HD2 long-life air filter with pre-separation keeps dust and debris out, extending service times. Meanwhile, the Ematic lubrication system optimises bar oil distribution, potentially reducing oil use by up to 50%—especially with long guide bars.
Designed for Easy Maintenance
Equipped with tool-free fuel and oil caps, side-mounted chain tensioning, and captive sprocket nuts, routine upkeep is fast and simple. The slim magnesium sprocket cover enhances chip ejection and balance while the steel-claw bumper spikes improve stability during cutting.
Suitable for Long Bars
Compatible with Ematic guide bars up to 90 cm (36 in), the MS 661 C‑M petrol chainsaw is built for high-capacity cutting. It’s a reliable workhorse for landowners, felling contractors, and forestry teams who demand top-tier performance.
Key Features
- Stihl MS 661 C‑M petrol chainsaw with 91.1 cc 2‑MIX engine and 5.4 kW power
- Power-to-weight ratio of just 1.4 kg/kW for easier handling
- M‑Tronic electronic engine management system
- ElastoStart decompression handle and anti‑vibration system
- HD2 long-life air filter with pre-separation
- Ematic lubrication system reduces oil use up to 50%
- Side-mounted chain tensioning and captive sprocket nuts
- Tool-free filler caps and slim magnesium sprocket cover
- Suitable for 28″–36″ Ematic guide bars and 3/8″ RS chains
