STIHL CHAINSAW M-TRONIC PROFESSIONAL 30"

The STIHL MS 661 C-M professional chainsaw is a powerful, high-performance saw designed for demanding forestry work, large tree felling, and professional timber harvesting. Built with a robust 91.1cc engine and advanced M-Tronic engine management, it delivers exceptional cutting power, consistent performance, and impressive fuel efficiency even in the toughest conditions.

Built for Professional Forestry Work

The MS661 C-M is engineered specifically for professional forestry users who require maximum power, reliability, and durability. Whether used for big timber felling, sawmill work, or cutting large-diameter hardwood, this chainsaw provides the strength and control required for high-capacity operations.

High-Torque 91.1cc 2-MIX Engine

At the heart of the MS661 C-M is a 91.1cc STIHL 2-MIX engine producing 5.4 kW (7.3 hp). This powerful engine delivers outstanding torque and cutting performance while maintaining improved fuel efficiency and reduced exhaust emissions. With a powerhead weight of just 7.4 kg, it achieves an excellent power-to-weight ratio, allowing faster cutting with better handling.

M-Tronic Electronic Engine Management

The advanced M-Tronic system automatically adjusts fuel mixture and ignition timing based on temperature, altitude, and operating conditions. This ensures optimum engine performance, rapid acceleration, and consistent power output without the need for manual carburettor adjustments.

Smooth Starting and Operator Comfort

Starting the MS661 C-M is made easier with the ElastoStart starter handle and decompression valve, reducing the pulling force required. The STIHL anti-vibration system minimises vibrations reaching the operator’s hands and arms, helping reduce fatigue during long working days.

Advanced Filtration and Efficient Lubrication

The HD2 long-life air filter with pre-separation system removes fine dust before it reaches the filter, extending cleaning intervals and protecting the engine in dusty forestry environments. STIHL’s Ematic lubrication system ensures precise delivery of chain oil, potentially reducing oil consumption by up to 50% when used with compatible guide bars and chains.

Designed for Durability and Easy Maintenance

Built for professional use, the MS661 C-M includes side-mounted chain tensioning, captive sprocket nuts, and tool-free fuel and oil caps for faster servicing in the field. A slim magnesium sprocket cover improves chip flow and balance, while steel bumper spikes provide better grip and control when cutting large timber.

Compatible with Long Guide Bars

This professional chainsaw supports guide bars from 28″ to 36″, giving forestry professionals flexibility when working with large trees and high-capacity milling applications. Paired with a 3/8″ RS saw chain, it delivers fast, aggressive, and precise cutting performance.

Key Features

• Powerful 91.1cc STIHL 2-MIX engine producing 5.4 kW (7.3 hp)
• M-Tronic electronic engine management for optimal performance
• Excellent power-to-weight ratio of 1.4 kg/kW
• ElastoStart handle and decompression valve for easier starting
• Advanced anti-vibration system for improved operator comfort
• HD2 long-life air filter with pre-separation system
• Ematic lubrication system for efficient chain oil usage
• Side-mounted chain tensioner with captive sprocket nuts
• Tool-free fuel and oil caps for quick refuelling
• Slim magnesium sprocket cover for improved chip ejection
• Compatible with 28″–36″ guide bars and 3/8″ RS chains