Stihl MS 400 C-M Chainsaw




Stihl MS 400 C-M Professional Chainsaw

The first chainsaw with a magnesium piston!
Professional petrol chainsaw 50cm/20'' bar

STIHL chainsaws with excellent cutting performance for professional use in forests. Ideal for felling, delimbing, and preparation of wood in medium-density stands. 

  • Long-life air filter system with HD2 filter for excellent filtering effect 
  • Easy and reliable starting
  • M-Tronic for consistently high engine performance
  • Captive nuts on the sprocket cover
  • Tool-free fuel caps for easy and reliable refuelling
  • The first chainsaw with a magnesium piston for an excellent power-to-weight ratio
Magnesium piston

Light-weight piston made out of magnesium. Excellent power-to-weight-ratio . High maximum speed. High durability.


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.

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.

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 2-MIX Engine

The new 2-MIX engine features an advanced stratified charge system that boosts power, whilst reducing consumption and pollution, significantly lowering unburned hydrocarbons in the exhaust. The result is a cleaner, more fuel efficient engine.


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.


Displacement :
66.8 cc
Power Output:
4 kW - 5.4 BHP
5.8 kg - without fuel, bar & chain
STIHL Oilomatic Saw Chain Pitch/type:
Saw Chain Pitch:
3/8 inch
Bar Length:
50 cm - 20 inch