Add new question to the seller

I AM INTERESTED IN THIS 1981 HATTERAS MOTOR YACHT.
QUESTIONS;
HOW MANY HOURS ON THE ENGINE?
ARE THESE 671 NATURALS OR 371 NATURALS? SEE ABOVE, BOTH ARE LISTED?
WHAT IS THE CRUISING SPEED AND WIDE OPEN THROTTLE SPEED?
HOW MUCH FUEL WILL SHE BURN AT CRUISING SPEED?
THREE OR FOUR BLADE PROPS?
HOW MUCH FUEL DOES SHE CARRY?
HOW MUCH FRESH WATER?
HOW MUCH GRAY WATER?
IS THERE A GENERATOR?
ARE THAT ANY ELECTONICS?
ARE THERE ANY DOCUMENTS FOR THE MAINTANCE HISTORY OF THE BOAT?
WAS THE BOAT EVER UNDERWATER OR IN A CRASH CAUSING HULL DAMAGE?
PLEASE CALL ME:
AL CHIECO ***

HOW MUCH FUEL DOES SHE BURN ON CRUISE?