The Rotax 912 iS2 Sport is a 100 HP, fuel-injected, 4-cylinder aircraft piston engine designed for light aircraft and LSA applications. It combines a modern engine management system (EMS) with a traditional gear reduction gearbox (PSRU) to keep propeller RPM efficient while allowing the engine to run at high RPM.

It is part of the Rotax 912 iS family and differs from carbureted versions by using:

full electronic fuel injection
dual redundant ECU system
optimized fuel efficiency and mixture control
Key features:

100 HP output (≈ 73.5 kW) at 5800 RPM
4-cylinder, 4-stroke opposed layout
Liquid-cooled cylinder heads + air-cooled cylinders
Dual redundant electronic fuel injection + ignition
Dry sump lubrication system with separate oil tank
Electric starter and integrated alternator
Gearbox reduction ratio: i = 2.43 : 1
Integrated overload clutch (prop strike protection)
Designed for LSA / experimental / certified installations (variant dependent)