Engine Recommendations For Part 103 Hughes Ultralight in the USA. Some owners of Part 103 ultralight aircraft use the Rotax 337,447 and 503 engines. These Rotax engines can still be found but they are no longer being manufactured and future maintenance parts may be an issue.
The 1/2 VW engine weighs 86 to 100 pounds in most cases makes the ultralight to heavy for Part 103 regulations. Hughes Ultralight recommends the Polini Thor 202 that produces up to 33 HP and weighs
only 37 pounds and we also recommend the Thor 303 which produces up to 39 HP and weighs only 50 pounds for dual ignition.
For Propellers Hughes Ultralights recommends E-Props for carbon fiber and Culver Props for pure art for the best in wood props.
Polini Thor 202 Polini Thor 303
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