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Selection Petrol Chainsaws for Forestry

MS 661 C-M

professional chainsaw with enhanced fuel efficiency and STIHL M-Tronic™ technology

General

MS 661 C-M
MS 661 C-M

When professionals need to fell large trees, in large quantities, they reach for the saw they know has the power to get the job done – the MS 661 C-M. Featuring an impressive power-to-weight ratio and STIHL M-Tronic™ engine management technology, the MS 661 C-M chainsaw also delivers less vibration and 20% greater fuel efficiency than the MS 660. Other features include a long-life filter system using HD-2 filter elements to provide longer run times between maintenance, an ElastoStart™ handle, and a high output adjustable oiler.

Versions



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

MS 661 C-M

Technical data

Technical data Value
Displacement cm³ 91,1
Performance kW 5,4
Weight kg 1) 7,4
Power-to-weight ratio kg/kW 1,4
Sound pressure level dB(A) 2) 105
Sound power level dB(A) 2) 118
Chain pitch 3/8"
Tank volume l 0,85
Chain brake QuickStop
Anti vibration system Standard AV-System
Carburettor STIHL M-Tronic
Oil tank volume cm3 400

1) Without fuel, without bar and chain
2) K-factor according to DIR 2006/42/EC = 2.5 dB (A)

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

MS 661 C-M

Standard features

  • STIHL 2-MIX-Motor Zoom
    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.

  • 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 its special material, the filter can easily be cleaned by washing, for example with STIHL Varioclean and warm water.

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

    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

    Precisely calculated buffer zones minimise the transfer of engine and saw chain vibrations to the front and rear handles. The chainsaw therefore runs noticeably smoother. This allows the user to save their strength and work longer.

  • STIHL ElastoStart Zoom
    STIHL ElastoStart

    Due to compression pressure, jerky stresses occur when starting internal combustion engines. The damping element in the ElastoStart special starter grip alternately absorbs and releases force according to the compression pattern. The result is smooth, even starting.

  • Tool free fuel caps Zoom
    Tool free fuel caps

    Special caps to open and close the tank cap quickly, easily and without tools.

  • Decompression valve Zoom
    Decompression valve

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

  • 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.

  • STIHL Ematic System Zoom
    STIHL Ematic System

    Compared to conventional bars without Ematic, the STIHL Ematic system reduces the consumption of chain lubricant by up to 50 %, depending on the type of wood and the cutting attachment used. This system comprises a STIHL Ematic or Ematic S guide bar, a STIHL Oilomatic saw chain and a variable-flow or reduced-flow oil pump. As a result, virtually every drop of chain lubricant is delivered to exactly the right spot.

  • QuickStop Chain Brake Zoom
    QuickStop Chain Brake

    The chain brake on your STIHL chainsaw can be triggered automatically or manually. In both cases, the brake band encloses the clutch drum and prevents the chain starting to move even when the throttle trigger is squeezed. The chain brake is applied manually by pressing the front hand guard on your STIHL chainsaw forwards. It is activated automatically whenever a sufficiently strong kickback is encountered.

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

    Side-mounted chain tensioning makes it easy to tension the chain safely.

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

    Different bar lengths, wood types and sawing techniques require different amounts of oil. The controlled-delivery oil pump allows the user to select just the right amount of oil for the job at hand.

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

Gebrauchsanleitungen

Languages Date Link
manual icon en 2019-07-31
Download PDF 2,3 MB
Download PDF 2,3 MB