What is fuel consumption of a 1999 135 hp mercury outboard?

The fuel consumption of a 1999 135 hp Mercury outboard typically ranges from 10 to 15 gallons per hour at wide-open throttle, depending on various factors such as load, operating conditions, and maintenance. At cruising speeds, the consumption may drop to about 6 to 10 gallons per hour. It's essential to refer to the owner's manual or consult with a professional for more precise figures based on specific usage conditions.