The engine is a four-cylinder, four-stroke, horizontally-opposed, 3,503cc (213.8cuin), air-cooled, direct drive, gasoline engine design. It employs dual electronic ignition, multi-point EFI and produces 118hp (88kW) at 3300 rpm.
Variants
UL350i
Base model that produces 118hp (88kW) at 3300 rpm.
UL350iS
Higher compression model that produces 130hp (97kW) at 3300 rpm.
UL350iSA
Same as UL350iS but with inverted oil system for aerobatic use.
UL350iHPS
Special version for helicopter use. It produces 150hp (112kW) at 3500 rpm.