One of my generators needs new magnets in the generator head, I have them on hand but it's a tow person job to get the engine and generator head out of the frame. Once that is done it needs to run for two hours to break in the engine, new engine on a free generator, then it gets converted to propane. Propane eliminates the problems of gas generators. The kit I bought will allow the engine to run on propane or gas, it will run on propane 99% of the time and gas only when there is no propane.
The other didn't want to start last week, needs the gas drained and new gas put in it. I'll probably have to clean the carb too.
If your generator is a bit hesitant to start don't use ether or starting fluid, use WD40. The ether or starting fluid will eat the seals and gaskets in the carb where WD40 won't.
I also have a small 2-stroke I need to work on, it's always been a pain to start but once running it is fine.
As for ethanol, if you live in Minnesota finding gas without ethanol can be a real chore, they do make additives that fix the issues with ethanol if you can't find anything else. The additives usually bind to the ethanol (and water) and basically make it pass through without burning.