Sorry to hear about the Yamaha problem, but following this thread makes me glad I bought the Honda 2000 over the Yamaha 2400. I seriously considered both, before choosing the Honda, primarily due to the lighter weight
, even knowing I was giving up a little extra power (or maybe not...like in your case).
A not so technical suggestion:
You might try pointing Yamaha to this thread, and pointing out that while there might be just a few contributors/advisors trying to help you determine the problem (apparently more than Yamaha), there are probably lots of us following the thread. I think they're getting a lot of free bad press in the RV community, and until they resolve the problem to your satisfaction, they're not doing themselves any favors. How hard a concept is that to understand?
Funny what a search on "Yamaha 2400 RV" or other combinations, will come up with.
Here's just one similar example:
Maybe there was a bad batch of 2400's?
Maybe Yamaha isn't aware the Internet is used for more than hosting their site for folks to read all the good sales stuff?
They should also pay attention to the not so good stuff as too many people researching purchases and seeing less than glowing reports, can't be good for sales.
Or, it could be that Yamaha hasn't heard the well known saying..."If you like our product/service, tell others, if not, tell us".
Good Luck, I hope you and all the advisors sort out the problem - just too bad Yamaha won't step up to the plate.