Petrol chainsaw MS661C-M

SKU : 848478

This MS 661 C-M is designed for extreme stresses such as huge felling or big timber harvesting.

Non-contractual photos

Petrol chainsaw MS661C-M

SKU : 848478

This MS 661 C-M is designed for extreme stresses such as huge felling or big timber harvesting.

Technical sheet

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Product Description

Designed for professionals greedy for exceptional and thrilling performances. This MS 661 C-M amazes by its evolutions : an engine from the latest generation which gains 200W extra and shows a decrease in fuel consumption (by 20%), new filtration system, new anti-vibration system (-21% compared with MS 660), new guide Light 80 cm available, automatic return STOP button, captive nuts… This MS 661 C-M goes to show its performance under extreme stresses such as huge felling or big timber harvesting.

Features

  • Bar length: 63cm
  • Chain 3/8″ RM
  • Engine 5,4kw
  • Displacement : 91,1 cm3
  • Included :
    • Chain Quick Tensioning
    • Controlled-delivery oil pump
    • Decompression valve
    • Easy starting system STIHL ELASTOSTART
    • Long-term air filter
    • hd2 filter
    • Tank closure without tools
    • Stratified scavenging engine
    • M-TRONIC equipped engine

Weight : 7,4kg

Benefits of the product

  • One-quarter turn plug of tanks

In order to facilitate the oil tank filling, STIHL has developped an exclusive system of opening and closing without tools.  The filling action can be easily done, and in a sure way because this concept guarantees a perfect sealing.

  • Compensator

This controller in the carburettor prevents the fuel-air mixture getting richer as the air filter becomes clogged. 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.

  • Return automatic decompressor

The decompressor reduces the engine compression when starting-up. It is easier to start and more comfortable. The decompressor is a valve located on the top of the cylinder. When we open it during start-up, it frees a part of the pressure in the cylinder. At the first combustion, it closes the first combustion to allows the engine to delivers its power.

  • Ematic system

The STIHL Ematic system reduces the consumption of chain oil 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.

  • Controlled-delivery oil pump

Permits a precise optimisation of the oil flow rate depending on needs.  The setting on the E mark guarantees a sufficient oil flow rate. Professionals proceed to a more precise metering. It is possible to make up to 50% of oil flow rate reduction .

  • Anti-vibration system

In order to reduce vibrations at the level of handles, STIHL developed an anti-vibration system (AV) really efficient. The engine and cutting device are totally suspended from the handles, whether it is by springs or elastomeric bumpers, or by a mix of those two components. As a result, the working comfort is better which reduces blood circulation problems in hands or arms.

  • Single-lever master control

All important functions such as start, choke, throttle and stop are operated via a single lever.  This command is then very convenient and safe. Moreover, located on the left of the rear handle, it is accessible with the tip of the thumb without being obliged to release the handle.

  • STIHL M-Tronic (M)

The engine management is completely electronic and guarantees a maximum power. The electronic box, which includes a microprocessor, a temperature sensor and the ignition module, control a solenoid valve which constantly adjust the fuel flow depending on the engine load.  Changes are automatically  managed and the power is adjusted according to the altitude and the degree of air filter pollution.

  • Stratified scavenging engine

At the entrance, a clean air layer, without fuel, fits between burnt gases in the combustion chamber and the fresh mixture from the bottom-engine. It reduces fuel-air mixture losses during scavenging – and it also reduces harmful effects on human health and the environment. The engine is environmentally friendly and reduces its consumption by 20%.  Gas emissions are reduced by 50%.

  • Captive nuts

The bar nuts are crimped in the chain guard. When changing the chain saw attachment or maintenance of the guide bar, you will not risk losing the nuts.

  • Side-mounted chain tensioning

Located on the side of the engine, the chain tensioner avoids any contact with the chain or the claw during chain tension.  It makes it easy to tension the chain safely.

  • ElastoStart STIHL

Elastostart is made up of a shock absorber located between the rope and the starter handle. The damping element in the ElastoStart special starter grip alternately absorbs and releases force according to the compression pattern. The result is smooth, the starting is easy. This STILH element will bring you comfort and safety.

  • HD2 filter

This HD2 filter is made of polyethylene and has up to 70% fine pores, compared to a membrane filter or a polyamide filter. This air filter keeps even the finest dust away from the engine. It is also water repellent, oil resistant and the filter can easily be cleaned.

 

 

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