Originally Posted by Nos4r2
General rule of thumb is 1 US gallon (approx 4 litres) per 10hp per hour at full throttle. Less throttle = less consumption.
Yes. My 9.8 two smoke runs at 4.5L/hr at max chat. Honda should be a bit less.
As NOS says, MPG is fairly vague. However, I can put in a 20Nm trip and use less than 10 liters. Expect to be pleasantly surprised by the fuel usage. On longer trips I use a 12L main and carry a 5L can as a spare.
that you will achieve 15-17mph on that rig, with the described load.