I have a 2006 Grady White Tournament 225 with an F225 I have owned for about a year. The Yamaha performance bulletin shows at
4000rpm 29.4 mph 3.34 mpg
5000rpm 37.6 mph 2.98 mpg
6050rpm 45.8 mph 2.35 mpg
My results are
4000rpm 20mph 2.3 mpg
5000rpm 30mph 2.4 mpg
6100rpm 38mph 2.2 mpg
Boat is...