How about this puzzle...
Boat A is a displacement hull diesel and gets, what most would regard as good fuel economy, let's say 5 GPH at 10 knots, while Boat B uses gas, is not displacement and burns gas at twice the rate, 10 GPH, but at 20 knots. So, take both boats on a 100 nautical mile run, Boat A uses 50 gallons and Boat B uses 50 gallons. They get the same fuel economy! Also, Boat B is less able to out run a storm.
MPG at what speed? If you get great distance and fuel burn at a low speed it is going to take you longer to go the same distance as a boat travelling faster burning more fuel, meaning you are going to burn more fuel to go the same distance.
I'm not sure this is correct. At GPH it is correct, but at MPG it doesn't matter, the only difference is the amount of time to get there (not the amount of fuel burned).
At 2 Miles per Gallon at any speed, no matter how fast you burn that gallon and traverse those two miles, you have still burnt a gallon and gone 2 miles.
My Kingfisher 2825 with Yamaha 350 according to the gauge the best I can do on plane is 2.3 MPG at around 28 KPH. Moving up to 40KPH the MPG drops to about 1.1.
Last August/early Sept when i was running to the Big Bank i was getting 2.8 NMPG @ 26 knots cruise plus trolling for about 5 hrs.
I have an extended to 28ft Hourston centre console with twin 135 Optis. Love them Optis!!
2.8mpg......you suck
I would kill to see those numbers
With my 200 optis on my 24 searay 2.1mpg is the best Ive seen so far but I am still trying different props.