the engine is noted for its extremely light base weight of 35 lb (16 kg).

[1][2][3] The F-33 was intended to fill the niche previously occupied by the now out-of-production 28 hp (21 kW) Rotax 277.

The F-33 uses free air cooling, dual capacitor discharge ignition and reed valve induction, with a single Bing 34mm slide or optional diaphragm type carburetor.

A belt reduction drive system, fuel injection, tuned exhaust and electric start are optional.

[1][2] The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil.