The STIHL 4-MIX® engine puts you in first place with exceptional power, unparalleled performance  and high fuel efficiency.

With the introduction of the STIHL 4-MIX® engine, STIHL unveils the outdoor power plant of the future.  This patented engine design provides all the benefits of 2-stroke and 4-stroke technologies combined.  The new STIHL 4-MIX® engine offers 5% more horsepower, 17% more torque and 15% less vibration than its 2-stroke counterpart.

Built with the patented STIHL lubrication system, it runs on standard 50:1 fuel mix, thus eliminating the need for a separate oil chamber.  Its compact design with fewer parts, creates less frequent service problems typical of a 4-stroke engine.  And, its unique construction makes it weigh slightly more than its 2-stroke counterpart.

Professionals will appreciate the fast acceleration, lower noise, high torque and high fuel efficiency with fewer "pit" stops.  So, when the day is done and the race is ended, finish in first place with the STIHL 4-MIX® engine.