Engine Technology

STIHL 2-MIX Engine Machinery

Power meets efficiency — discover how STIHL's 2-MIX engine technology reduces emissions, saves fuel, and delivers high torque in every tool.

STIHL 2-MIX engine diagram showing efficient fuel-air transfer

What is STIHL 2-MIX Technology?

STIHL's 2-MIX engine is a high-performance, fuel-efficient two-stroke engine that separates exhaust and fresh fuel charge. The result: up to 20% less fuel consumption and up to 70% fewer emissions than conventional engines.

STIHL 2-MIX engine diagram showing efficient fuel-air transfer

STIHL 2-MIX engine — delivering high performance with lower emissions.

How the 2-MIX Engine Works

A stratified charge layer of air sits between the burnt gases and fresh fuel mix, preventing fuel loss through the exhaust. This keeps performance high while keeping emissions low.

  • Air buffer separates fresh mix from exhaust gases
  • Cleaner combustion = more torque, less waste
  • Efficient power delivery for longer runtimes

STIHL 2-MIX Engine Technology

STIHL 2-MIX vs Standard 2-Stroke Engines

FeatureStandard 2-Stroke EngineSTIHL 2-MIX Engine
Fuel UseHigher due to lossesUp to 20% less fuel
EmissionsHigh exhaust gasesUp to 70% fewer emissions
TorqueGood mid-rangeImproved low-end pull
MaintenanceRequires frequent cleaningCleaner combustion, less wear
ComplianceStandardMeets Euro V standards

Summary: STIHL 2-MIX Engine Technology

  • Up to 20% less fuel consumption
  • Up to 70% fewer emissions
  • Maintains full power and torque
  • Cleaner operation, longer service life
  • Integrated across chainsaws, trimmers, blowers and more

Explore More Engine Tech

See how STIHL's other engine innovations work together.

View Engine Technology Guide

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Compact chainsaw featuring 2-MIX engine for powerful, low-emission cutting.

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STIHL FS 70 C-E Brushcutter
STIHL FS 70 C-E Brushcutter

Fuel-efficient brushcutter with 2-MIX technology — ideal for garden and landscape maintenance.

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STIHL BR 350 Backpack Blower
STIHL BR 350 Backpack Blower

Powerful and ergonomic 2-MIX blower designed for extended professional use.

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