100-135 hp, four-cylinder, horizontally opposed, air-cooled, piston engine family
| Manufacturer | ●●●●●●●●●● Why is this obscured?  |
| Category | Engines - Piston Engines |
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| American Champion 7ECA Citabria Aurora - O-235-K2C |
| American Super Legend - YO-235 |
| Fisher Celebrity - Optional O-235 |
| General Avia F22 A - O-235-N2C |
| IPE IPE 06A - O-235-NBR |
| Jiucheng JC-100N - O-235 |
| Kitfox Super Sport - Optional O-235 |
| Murphy Rebel - O-235-N2C |
| Robin DR401 - O-235-L2A (DR401/120Lite/120A) |
| Serenity Spacewalker 2 - O-235 |
| Taylorcraft F22 Classic - O-235-L2C |
| Van's RV-3 - O-235 |
| Van's RV-9 - O-235-L2C |
| Vulcanair V1.100L - O-235-C1/C1B |
| Wag-Aero Sport Trainer - O-235 |
| Wag-Aero Wag-A-Bond - O-235 |
| Zenith CH 650 - Optional O-235 (CH 650LS/B) |
| Zenith CH 750 CruZer - Optional O-235 |
