The Lycoming O-320 series engines are four-cylinder, direct-drive, horizontally opposed, air-cooled models. The cylinders are of conventional air-cooled construction with heads made from an aluminum-alloy casting and a fully machined combustion chamber. The cylinder barrels are machined from chrome nickel molybdenum steel forgings with deep integral cooling fins, ground and honed to a final specified finish. The O-320 series engines are equipped with a float-type carburetor. Particularly good distribution of the fuel-air mixture to each cylinder is obtained through the center-zone induction system, which is integral with the oil sump and is submerged in oil, ensuring a more uniform vaporization of fuel and aiding in cooling the oil in the sump. In addition, the IO-320 has a fuel injector. The fuel-injection system schedules fuel flow in proportion to airflow. Fuel vaporization takes place at the intake ports.

FORGED-STEEL CONNECTING RODS

OPTIONAL CHROME KIT

NITRIDE HARDENED STEEL ALLOY CYLINDER BARRELS

FORGED-STEEL CRANKSHAFTS

CHROMIUM-MODIFIED NI-RESIST IRON EXHAUST-VALVE GUIDES, RESULTING IN BETTER WEAR CHARACTERISTICS

FORGED-STEEL CAMSHAFTS

AVAILABLE OPTIONS:

    * Lightweight starters
    * Electronic ignition
    * Spin-on or remote oil filter
    * Air conditioning provisions
    * Factory chrome kits:
          o Triple-plated rocker-box covers, intake pipes and shroud tubes
    * Optional magnetos
    * Fixed-pitch or constant-speed propeller applications