Did you take out the spark plug and add a little oil put the plug back in, let it run for about 3-4hrs and then change the oil for proper break in? There is a science behind making a generator last longer.
No. He put oil in it, ran it for 2 minutes and put a load on. I have always done 1 hour break in and oil change. You get a LOT of metal particles in that first hour you don't' want to hang around. Then i run it for 5 with varying loads, like a fridge and window unit , so the engine speed varies when the compressors go off and on. Change oil again and go to 50 hrs after. I'm not saying he ruined it or anything, but ya gotta change that oil and then CHECK IT every 8-12 hours. Happy genning.