Hirth F-263
# 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 (23 kW) 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

## Specifications (F-263)

Data from Cliche

### General characteristics

* Type: Twin cylinder, two-stroke, aircraft engine
* Displacement: 383 cc (23.4 cu in)
* Dry weight: 70 lb (31.8 kg)

### Components

* Valvetrain: piston-ported
* Fuel system: 1 X Bing carburetor
* Fuel type: unleaded 93 octane auto fuel
* Oil system: 50:1 fuel/oil premix
* Cooling system: fan forced air
* Reduction gear: optional gearbox

### Performance

* Power output: 30 hp (22 kW)
