Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
450963
Onan Generator troubleshooting, diagnosis, design, and mitigation of generator cooling related issues. It is intended to present current documentation, at the time of writing, and provide a source for learning how to prevent and/or fix generator overheat concerns.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.