If you have some mechanical knowledge and experience, you can troubleshoot backfiring issues yourself. However, it is recommended to consult the lawn mower's user manual or seek assistance from a professional if you need clarification on the troubleshooting process. Safety precautions should be followed, such as disconnecting the spark plug wire and working in a well-ventilated area. If in doubt, it's best to leave complex repairs to trained technicians who can accurately diagnose and fix the problem.