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Lycoming Home > Engines
Lycoming 320 cubic inch series
Its resolve is made of steel, too.
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:
- Triple-plated rocker-box covers, intake pipes and shroud tubes
- Optional magnetos
- Fixed-pitch or constant-speed propeller applications
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