What is the dry weight of the Lycoming IO-390?
Four-cylinder, fuel-injected, horizontally opposed, air-cooled direct drive, 390 cubic inches (6. W) at 2700 rpm, dry weight 308 lb (140 kg), The X designation is a generic indicator for all engines in the family. Four-cylinder, fuel-injected, horizontally opposed, air-cooled direct drive, 390 cubic inches (6. W) at 2700 rpm, dry weight 308 lb (140 kg), non-certified engine for experimental aircraft assembled by Lycoming’s Thunderbolt division.