Hirth F-263

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.

Development
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 31 hp and runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil. Recommended time between overhauls is 1000 hours.

Applications

 * Howland H-3 Pegasus
 * Falconar HM-293