The answer to 'why is my generator burning smell' is that a burning smell from your generator is typically caused by an electrical issue or mechanical problem. This could be due to overheating, a failing component, or improper maintenance. Some common causes include worn brushes, a faulty alternator, or a problem with the fuel system.
If you notice a burning smell, it's important to shut off the generator immediately and investigate the source. Continuing to run a generator with a burning smell can lead to further damage and potentially dangerous situations. Try to identify the specific component that is causing the issue, such as a burning belt or overheated engine. If you're unable to pinpoint the problem, it's best to call a professional electrician or generator repair technician to inspect and diagnose the issue.