With models producing up to 125 horsepower at 2800 rpm, this rugged “little engine that could” still does in aircraft around the world.

The Lycoming O-235 series engines are four-cylinder, direct-drive, horizontally opposed, wet-sump, 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.

•  Forged-steel connecting rods


• Nitride-hardened steel alloy cylinder barrels


• Forged-steel crankshafts


• Forged-steel camshafts


• Chromium-modified ni-resist iron exhaust-valve guides, resulting in better wear characteristics


• Optional chrome kit


• Optional fixed-pitch or constant-speed propeller applications.