I'm feeling your pain Hive account@cryptoandcoffee, I've got a generator that I use down my allotment, and that's off-grid. it stopped working for some unknown reason, so I bought another one (second hand) and it worked for about 3 hours and then started to leak oil before coming to a stop still.
I have however got the 1st genny working by replacing the carb, I also had a mate to help me do this as I had no clue what I was doing.
Again it ran for about 6 hours this time before stopping again, I'm starting to lose my rag with it and I'm thinking about buying a brand new one next time.