In comparison to the 80 hp version of the Rotax 912 series the 100 hp product line offers more power while keeping the same weight. This engine series offers a time between overhauls of 2,000 hrs and the best power to weight ratio in its class ‒ no surprise that this engine is the best selling 4-stroke aircraft engine.

This series is available as non-certified (Rotax 912 ULS) and certified engine (Rotax 912 S) according to FAR 33.

• 4-cylinder
  
• 4-stroke liquid-/air-cooled engine with opposed cylinders
• Dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappet
• 2 carburetors
• Mechanical fuel pump
• Dual electronic ignition
• Electric starter
• Propeller speed reduction unit
• Air intake system