How to perform an m-tronic reset

Our M-Tronic technology is designed to make sure that your tool delivers an optimum performance, all day, every day, by making automatic adjustments to regulate the fuel and air mix to the machine.

However, there are a couple of instances where you may need to reset your M-Tronic machine. Firstly, if you carry out any work on the fuel supply system, such as changing a solenoid valve, replacing or cleaning a carburettor or even just replacing an old fuel filter, you will need to do an M-Tronic reset.STIHL M Tronic Logo

Secondly, if you find that the saw isn’t running as expected (for example, not revving to its full potential), it is always worth resetting your machine as this may offer a quick and simple resolution.

There are two methods to reset a STIHL machine with M-Tronic. Method 1 is for machines with M-Tronic 2.0 or lower, and Method 2 for Machines with M-Tronic 2.1 or higher. It’s easy to tell which version you have by looking at the CE label. Machines with M-Tronic 2.1 or higher are shown on the label highlighted here. If it’s not shown on the CE label (M2.1 or M3.0) then it is likely you have an older version of M-Tronic.

STIHL machine Serial Number

Method 1 for M-Tronic re-set:

  1. Remove the scabbard
  2. Ensure the chain brake is engaged (on)
  3. Put the machine in the ▲ Cold start position
  4. Start the machine and run it in the ▲ Cold start position for at least 90 seconds
  5. Do not touch the throttle or accelerate the saw during this time
  6. After 90 seconds, switch off the machine
  7. Your machine is now re-calibrated and ready for operation

M-Tronic Chainsaw In Use

Method 2 for M-Tronic re-set:

  1. Remove the scabbard
  2. Ensure the chain brake is engaged (on)
  3. Put the machine in the ▲ Cold start position
  4. Start the machine and run it in the ▲ Cold start position for at least 30 seconds but no more than 60 seconds (the period marked as A in the diagram below)
  5. Do not touch the throttle or accelerate the saw during this time
  6. Disengage/release the chain brake
  7. Open/squeeze the throttle fully for at least 30 seconds (B in the diagram)
  8. Engine speed varies noticeably during calibration
  9. As soon as the engine speed drops noticeably (C), release the throttle back to the idle position
  10. When the engine is back to idle speed, engage the chain brake and switch off
  11. Your saw is calibrated and ready for operation

Always double check your Owners’ Manual to make sure you are following the right reset procedure – you can find copies of Owners’ Manuals on the STIHL website here.

Please note that when using a chainsaw, you should always wear the correct Personal Protective Equipment and take any necessary precautions.

Paul Hicks
Paul has worked for STIHL for six years and is responsible for the range of STIHL products that is sold here in Great Britain, which means he definitely knows his stuff when it comes to all things STIHL.
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