Ann Cat,
Hmmmm ... you mention regarding your Onan - "have to set altitude every time".
I've never adjusted the altitude setting on our built-in Onan generator regardless of what the manual may or may not say. It has always started right up and "run fine" at sea level or up in mountains. I wonder what the downsides of doing this were/are?
(However, from experience I know what goofing up and running an engine too lean, too long, can do to it. So I guess that my Onan may have only been run too rich on a lot of our motorhome trips.)
