Ok at the gas pumps locally, there is no individual ethanol percentage, but just a statement for all that "may contain up to 10% ethanol" You have to check their websites apparently.
I can see that the oil might matter if it affects revs at all.
I believe the engine does matter because it has that revolving field thing for the electrical output.
If it slows down like when I had it choked by mistake, it ran, but overloaded easily, and when I put the choke over to where it belongs, the red flashing light stopped and you could hear that it was revving higher.
The manual says it can "bog down" if overloaded. I think what I want is to keep the revs right up at that max rated load 1700VA. Not too clear about that and whether "clean" fresh gas (even fresh 87) would do it.
I have measured the load of the 75 amper with the Kill-A-Watt and it is pulling just under 1700VA when doing 75 amps and set to about 14.6v, so it ought not to overload this gen. It did not overload it when the 75 amper was doing power supply. It does when on battery charging duty. I think it is almost ok and perhaps it just needs better gasoline or perhaps the oil as was suggested. Just have to keep trying things.
Looks like I have to try it with clean, fresh gas next time. I don't want to change the oil to synthetic also, because then I wouldn't know which was the cure if it works. One thing at a time.
I did use the 55 amper instead. Then I started the engine for some alternator. Amps jumped to 70 so they do add their amps, but with the alternator voltage lower, you don't get all those amps, just some. No solar in the woods to add any amps. So I would like to get that 75 to work off the gen. We'll see.
