The answer to 'generator sparking' is that a generator sparking is often a sign of an electrical issue that requires attention. Common causes include worn brushes, loose connections, or a problem with the generator's voltage regulator. Symptoms may include visible sparking, flickering lights, or inconsistent power output.
In most cases, generator sparking is an indication that professional electrical service is needed. Attempting to repair a generator with sparking issues can be dangerous and should only be done by a qualified electrician. They can diagnose the root cause and make the necessary repairs to restore safe, reliable operation.