The Hirth F-263 is a twin cylinder, in-line, two stroke, carburetted aircraft engine that was designed for use on ultralight aircraft. It was manufactured by Hirth of Germany, but was discontinued about 2001.[1]
The F-263 uses fan cooling and piston-ported induction, with a single Bing carburetor and single capacitor discharge ignition. The cylinder walls are electrochemically coated with Nikasil. Standard starting is recoil start. A gearbox reduction drive system and electric start were factory options.
The engine produces 310NaN0 and runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil. Recommended time between overhauls is 1000 hours.