I downloaded three manuals a while ago. One is on the Kubota engine, the second on the Onan specific service items and the third is a parts list. They are 8.6, 6.6, and 4.2 MB respectively, and are in .pdf format. Unfortunately, I don't remember the sites I found them on. If you can accept 3 emails with attachments that big, I'd be glad to share them with anyone who wants them. Just send me a PM with your email address.
2013 Tiffin Allegro Bus 43QGP
2011 Chevy Silverado 1500 Toad