If you look where the previous gen set was installed, you should see a footprint of that piece of equipment, right? A plumbed in generator is much nicer than a Honda 2000, which has to be mounted on deck or in a dinghy with your shore power cord running to it. I own a Honda 2000 generator and love it, but it is not like a permanently installed unit. Assuming you have diesel fuel to your 29.5 you can also run that fuel to a diesel generator and it needs to be plumbed for water cooling, but I also assume since you had one in the boat at one time, that there is a seacock for water intake and exhaust. I would ask those who sell generators in your area for possible makes that would fit. Onan, Panda Fisher, Westerbeke are a few that come to mind right away. The panel you have, I presume has the controls to start the generator and turn it off and there also should be a switch to toggle back between the generator and shore power as you don't want them both on at the same time.