The answer to 'generator making buzzing noise' is that a buzzing noise from a generator is often caused by a problem with the generator's alternator or voltage regulator. This can be due to a loose connection, worn bearings, or a malfunctioning component. The buzzing sound may also indicate an issue with the generator's fuel system or engine.
If the generator is making a buzzing noise, it's important to investigate the cause right away. Continuing to run the generator with a buzzing noise could lead to more serious damage. Start by checking the alternator and voltage regulator connections, and inspect the generator for any loose parts or debris. If you're not comfortable troubleshooting the issue yourself, it's best to call a professional electrician or generator repair technician to diagnose and fix the problem.