[Chris Burkard]

1) The "Gen Running" light on the dash doesn't activate, any idea where the sensor or activation switch for this is? Bulb seems to still work.

I believe this is run to the main AC panel in the cabin to the back of the main Generator Breaker.

2) There is a single light switch on the right side up high just inside the companion way, any idea what this is for?

As mentioned above, this is the likely for the main cabin light above the cabin entrance door. Also as mentioned, you may have to turn on the breaker for the remote lighting switch.

3) There are two freshwater pumps mounted under the stairs, the upper one doesn't work but we still have good pressure. Any idea why they installed 2 pumps? It appears to be a single speed pump, could I replace this with a mutli-speed/on demand pump or would the different pumps not work well together?

Tiara installed two fresh water pumps in line on many different boat models. The two single speed pumps build more consistent water flow than a single pump and eliminate the need for a pressure regulator tank. Yes, you could switch to a single multi-speed pump. You may want to consider installing a regulator tank if you go this route.

4) The drain hoses for both fish boxes appear to just drain into the bilge, is this correct? On my 31' they drained overboard.

Tiara offered an option to plumb the fish boxes to a macerator (they T'd both boxes to a single macerator). If the original owner did not order this option, then they just drained the boxes into the bilge. If you don't use the boxes for fish, I would not bother plumbing them to a macerator. The macerator is just another pump to maintain and is not necessary if you are just putting fresh water into the bilge. Obviously, you do not want to drain fish guts into the bilge as you will never get the smell out.