Is the choke getting stuck on? Or is it opening all the way when it should?Onan issues...
I'm off to search the pages. It was working reasonably well for the last few months. Went camping for the first time this weekend. Onan would start, run for a few seconds, then start to sputter, cough, and run rough with black smoke and a non-burnt fuel smell. It continues to run, it will handle an air-conditioner load, but something is very wrong, so I shut it down.
Found this thread