What should be done if the generator has contaminated fuel?

When a generator has contaminated fuel, draining and replacing the fuel is the most effective and reliable solution. Contaminated fuel can lead to various operational issues, such as clogging fuel filters, damaging fuel injectors, or causing the generator to run inefficiently or fail to start. Simply running the generator in an attempt to "clean itself" could exacerbate the problem, leading to potential damage.

By draining and replacing the fuel, you ensure that the generator operates with clean fuel, which is essential for optimal performance and longevity. This action eliminates any impurities or water that may have entered the fuel system, thus preventing further complications. Adding a fuel additive could help in some cases, but it may not be sufficient if the contamination is severe. Changing the oil filter does not address the problem of contaminated fuel directly; it pertains to the lubrication system rather than the fuel system.

Therefore, the appropriate course of action to restore proper operation and maintain generator health is indeed to drain and replace the contaminated fuel.