Why lawnmower makes scraping sound?

A lawnmower may make a scraping sound due to several reasons, such as a dull or damaged blade that is hitting the mower deck or other components. Debris, like grass or sticks, caught in the blade or deck can also cause scraping noises. Additionally, loose or worn-out parts, such as the belt or bearings, can contribute to unusual sounds during operation. Regular maintenance and inspection can help identify and resolve these issues.