Continental O-300-D
Maintaining Your AirplaneServicing Cessna 172 Stuck Exhaust Valves
A rough-running engine means it’s time to pop valve covers.
Richard Scarbrough![](https://www.flyingmag.com/uploads/2024/05/Maintaining-your-aircraft-scaled.jpeg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
![](https://www.flyingmag.com/uploads/2022/09/Pilot-and-copilot_adobe-stock-rs.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
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