Originally Posted by jyasaki
Out of curiosity, what's your fuel consumption at that speed?
Fuel consumption at max revs is about 1.2 liters per nautical mile per outboard, i.e. total 2.4 liters per nautical mile or about 120 liters/h or 2 liters per minute. Or 31.7 gallons per hour. The tanks can hold four hours of gas at max speed.
However, if you compare this to the minimum consumption soon after planing speed, about 0.95 liters per nm per outboard, the difference is not so big that I would select the speed by economy only.
It makes it easier for me to justify all the maintenance costs if I manage to spend more on gas (=enjoying the boat) than on maintenance. I've had one transmission replaced completely, all the hypalon pontoons replaced (custom made) and the electrical systems rewired. Plus added side scan sonar and other goodies. That's a lot of gas to burn yet;-)