The manual does not say that the generator should run in ... As for the engine, Honda recommends the first oil change after 20mth. And I stick to it, because I have a few of these engines from gx 25 to gx 390 and I always do the same, i.e. good oil (motul 10w30), taking care of its level, air filter, good fuel and engine warming up before work and cooling when idle revolutions after hard work and so far for a few years all engines work without failures, and some have something to do ... As for the concrete mixer, I did not write about it out of my ignorance, because I assumed that the 1.1 kW engine would not be a problem, only now You made me realize that it may be different ... On the other hand, a few years ago I worked on a Chinese three-phase aggregate and 1.5 kW concrete mixer, the aggregate had 4.5 kW and avr, worked a lot, surprisingly the concrete mixer was going well and the 2000W angle iron was able to turn it off and somehow survived, so fogo should be able to cope even more, considering that the concrete mixer will work a total of 5 or 10 hours and nothing more. Anyway, thanks for valuable advice on the aggregate itself, it will definitely be useful me and other users ...