Submitted by Mark (not verified) on Thu, 05/28/2009 - 23:37.
Run your hull at 7kts and see what the rpm's are. As soon as the bow lifts , you are just pushing a wave and wasting fuel. Check the yanmar site for rpm/fuel curve info. At 2k rpm fuel consumption is 5 ltrs/hr. At 2500 it's 10, at 3000 its 15, higher than 3000 and it really goes up. http://www.yanmarmarine.com/uploads/products/pdf/BY/4BY150.pdf
optimum cruise settings
Run your hull at 7kts and see what the rpm's are. As soon as the bow lifts , you are just pushing a wave and wasting fuel. Check the yanmar site for rpm/fuel curve info. At 2k rpm fuel consumption is 5 ltrs/hr. At 2500 it's 10, at 3000 its 15, higher than 3000 and it really goes up.
http://www.yanmarmarine.com/uploads/products/pdf/BY/4BY150.pdf