What feature of a manual propeller device should you check before each trip?

Before each trip, it’s crucial to check the condition of the propeller blades for any signs of damage, such as cracks or dents, as these can affect performance and safety. Additionally, ensure that the propeller’s locking mechanism is secure and functioning properly to prevent it from loosening during operation. Lastly, inspect the hub for any signs of wear or corrosion to ensure smooth operation.