This engine series offer a time between overhauls of 1000 hours at 75% power and is fit to take on any challenge in the future. 65 HP; Air Cooled; 2-Stroke The Hirth 3202 and 3203 are a family of in-line twin cylinder, two stroke, carburetted aircraft engines, with optional fuel injection, designed for use onThe Hirth 3202 and 3203 are a family of in-line twin cylinder, two stroke, carburetted aircraft engines, with optional fuel injection, designed for use on Hirth Engines offers 2-Stroke engines with outstanding quality, unmatched performance and efficiency. ✓ UAV ✓ Light Sport Aircraft ✓ Ultra Light