Hi Peter and Chatso, There is another James Flood died Sydney 1891. I know this is not anywhere near carcoar but both his parents are listed as unknown. It would make him 81 a pretty good age in those days.
1283/1891 FLOOD JAMES, Father UNKNOWN Mother UNKNOWN, SYDNEY
Long shot, but maybe he had been in Sydney for a reason. Possibly an accidental death?
EDIT TO NOTEI did not see the other thread until now!
A Waste of time searching I see.

Regards....Neil