4 cylinder, 4 stroke liquid/air cooled engine with opposed cylinders, dry sump forced lubrication with separate 3l (.8 gal US) oil tank, automatic adjustment by hydraulic valve tappet, 2 CD carburetors, mechanical fuel pump, electronic dual ignition, electric starter, integrated reduction gear i= 2.27 & slipper clutch.

Same as Rotax 912 A2 but fitted with propeller shaft that would allow the engine to be converted to a 912 A3 for use with a constant speed propeller.