Here is my Honda EC 5000 petrol generator. The generator runs. It has seen no use apart from the occasional start-up to check it runs. I have the generator because my waste water is pumped to the mains from my pump house. If there was a power cut neither myself nor my neighbours could flush their toilets. However, Thames Water (the crooks) have taken responsibility for the pump house and changed the electrical configuration so I can't attach the generator in the event of a power cut.
eBay