So on Labor day (among others), I always take an hour and fire up the Backup Generator...just to lube the internals and make sure it is ready to go when it is needed.
Like a carry gun or a fire extinguisher, you don't need 'em until you really need 'em.
So I take the time to fire it up, make sure the internals are lubed and operated long enough to warm it up and dry it out, and spend a few minutes with an oil can making sure that things that move are lubed with clean oil. Check the air filters for mice and other things which might clog or otherwise hinder the operation. Cooling vents are clear and unobstructed and everything is ready.
All good this time. Ready to go, and it fired up nicely. Should do what I need when I need it.
When was the last time you checked your generator?