Re: bigfoot class b
If you live anywhere near Kitchener/Waterloo, take it to Don's Trailer Service if the Onan needs service after you try it out.
They're just down the road from the Roadtrek factory. They could probably do the rest of the RV system checks as well. I had a problem with my Onan a few years back, and they were able to fix it fairly easily. Wasn't cheap, I think around $400 to remove/repair/replace the unit in my van. It's been fine ever since. They suggested the regular exercise routine as the best PM for a generator, particularly Onans.
It's not a sprint(er) (unless you make it one), it's (hopefully) a marathon.
RV - 2018 Navion 24V + 2016 Wrangler JKU