From Name: From Email: To Name: To Email: Optional Message: Is the O-435 a tough engine? from General Aviation News According to author Paul McBride: Almost forgotten may be a stretch, but you should consider yourself lucky to have one of these dinosaurs! The best advice I can suggest not knowing the history of your aircraft and engine is to recommend using some common sense. Now that I stop and think about that, maybe that's as uncommon these days as your O-435. more 7701 Las Colinas Blvd., Ste. 800, Irving, TX 75063