Lawn mower repair involves diagnosing and fixing issues that prevent a mower from functioning properly. Common problems include a faulty spark plug, dull blades, or a clogged air filter. Regular maintenance, such as changing the oil and cleaning the mower, can help prevent these issues. When repairing a lawn mower, it's important to have the right tools, such as wrenches and screwdrivers. Many repairs can be done at home, but some may require professional help. Understanding the specific model, like a Honda or Toro, can also aid in finding the correct parts and instructions for repair.