With the parts you show as changed was this after it would not start and you just started throwing parts at it? Does it even catch like it is trying to start? As with any vehicle verify spark, engine getting fuel/plugs wet? Probably not fuel injected, have you given it a shot of starting fluid? When you removed the generator is it possible you opened up a fuel line so it is only sucking air?
Brian, Loretta & Daisy (Golden Retriever)
2008 Holiday Rambler Endeavor 40 PDQ , ISL 400
2014 Ford Explorer toad