Well, after some digging, I found the transfer switch. It is buried in a closed in compartment under and behind the wardrobe. I pulled the electrical breaker panel and could see it under there. I ended up cutting out an access under a drawer and finally could reach it.
It is a Progressive Dynamics PD5110nGenerator Transfer Relay
http://www.progressivedyn.com/pd5110010.htmlI tested shore power and found power coming into the relay and out feeding house 120v. I unplugged shore power and started the generator. Power in, but not out. Its location is a major PIA to get to to change the relay.
Contemplating next steps (meaning beer time...)