Selection Professional Chainsaws

MS 661 C-M

STIHL MS 661 C-M Chain Saw

General

Simply the most popular commercial chain saw in the world for felling, trimming and all commercial and forestry applications. The MS 661 C-M is a rugged all-rounder equipped with STIHL's environmentally friendly 2-MIX engine technology for less fuel consumption, less emissions and outstanding cutting performance. In addition the MS 661 C-M features a heavy duty (HD2) air filter system with a radial seal which keeps out fine dust particles combined with the compensator the MS 661 C-M can now be used for 20% longer than the MS 660 before a filter clean is required. The MS 661 C-M is fitted with STIHL's M-TRONIC electronic engine management system which enables the saw to automatically adjust to varying fuel grades, changes in altitude and temperature and as there are no manual carburettor adjustments starting this saw is easier than ever before, simply push the start level to the on position and pull. The MS 661 C-M is now the only choice for professionals.

Versions

Price

*Prices are valid from the 1/9/19 to 31/10/19.
STIHL stores are operated as independent businesses. The products described in this website may not be on display or available at each STIHL store. STIHL reserves the right to change pricing at any time without notice.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

Technical data

Technical data

Displacement cc 91.1
Power output kW/bhp 5.4/7.3
Weight kg 1) 7.5
STIHL Oilomatic saw chain pitch/type 3/8 "
Tank volume mL 850.00
Standard chain RAPID SUPER

1) Without fuel, without bar and chain

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

Features

Standard features

  • HD2-Filter Zoom
    HD2-Filter

    This air filter keeps even the finest dust away from the engine, ensuring a particularly long service life. Thanks to special material, the filter can be washed clean, for example with STIHL Varioclean and warm water.

  • Decompression valve Zoom
    Decompression valve

    The decompression valve is part of the easy start-system. The valve should be pressed before starting in order to reduce the compression pressure when starting, as well as the effort needed to pull the starter rope. The decompression valve is semi-automatic, meaning that it must be pressed manually before starting, but then closes automatically.

  • STIHL M-Tronic (M) Zoom
    STIHL M-Tronic (M)

    For a cold start, the STIHL M-Tronic only needs one start position on the combi-lever. After starting, you can immediately power up to full speed. The amount of fuel required is precisely calculated by the system and supplied as needed. Otherwise, start in position I as usual.

  • STIHL anti-vibration system Zoom
    STIHL anti-vibration system

    Intense vibration at the handles of power tools can lead to longer-term effects of blood vessels in the hands and arms. STIHL have therefore developed an effective anti-vibration system where by the oscillations from the machines engine are dampened which significantly reduces vibrations at the handles.

  • STIHL 2-MIX-Motor
    STIHL 2-MIX-Motor

    Der sparsame STIHL 2-MIX-Motor mit 1-in-4-Kanaltechnologie überzeugt mit einem hohem Drehmoment über einen weiten Drehzahlbereich. Dabei spart die Motorsäge bis zu 20% Kraftstoff im Vergleich zu leistungsgleichen STIHL Zweitaktmotoren ohne 2-MIX-Technologie. Der Abgasausstoß wird um bis zu 50 % gesenkt.

  • Compensator Zoom
    Compensator

    This controller in the carburettor prevents the fuel-air mixture getting richer as the air filter becomes clogged. The correct quantity of fuel is delivered to the carburettor depending on the quantity of air passing through the air filter. This keeps the fuel/air ratio in the combustion mixture constant and hence also the engine power. The filter doesn't need to be cleaned until an appreciable drop in power occurs.

  • Captive bar nuts Zoom
    Captive bar nuts

    Bar nuts held captive in the sprocket cover will not get lost when changing over the cutting attachment.

  • Controlled-delivery oil pump Zoom
    Controlled-delivery oil pump

    The exact chain oil output can be adjusted maunally for varying conditions, allowing for a reduction of up to 50%.

  • QuickStop Chain Brake Zoom
    QuickStop Chain Brake

    Die QuickStop-Kettenbremse ist ein Schutzmechanismus beim Umgang mit Motorsägen. Die Kettenbremse wird über den vorderen Handschutz betätigt und bringt die Sägekette in Bruchteilen von Sekunden zum Stillstand. Bei ausreichend starkem Rückschlag löst die Quickstopp-Kettenbremse automatisch aus.

  • Side-mounted chain tensioning Zoom
    Side-mounted chain tensioning

    The tensioning screw is located on the side of the chain saw through the sprocket cover. Chain side tensioning allows the saw chain to be retensioned effortlessly, avoiding any contact with the sharp chain.

  • STIHL Ematic-System Zoom
    STIHL Ematic-System

    The Ematic chain lubrication system ensures pinpoint lubrication of the saw chain links and guide bar rails. When used with STIHL OILOMATIC saw chain, it will provide maximum lubrication, longer wear and less oil consumption than conventional methods of chain lubrication. The Ematic system can reduce bar oil consumption up to 50%.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.

Documents

Owners manuals and safety brochures

STIHL MS 661 C-M (GB) Download PDF, 2.8 MB

Notes:

  • STIHL online owner’s manuals are usually for the latest versions of the machine. Your product may be a slightly older production model but the manual will still be appropriate for the relevant model number.
  • The languages ​​contained in the document are also displayed in brackets, for example (GB) = English.