How much does a Lycoming IO-390 weight?
IO-390 models. 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. The IO-470-L engine has a 471 cubic inch displacement achieved by using a cylinder design with a 5. The dry weight of the engine is 411. The average weight of the engine with installed accessories is approximately 465 lbs.