Thanks for the input. I appreciate it. I read the posted preformance spec's on C-Dorys web site. I wondered if they tested with a light boat.
Test done with twin 150 Honda 4-strokes.
3000 RPM, 20 MPH, Fuel burn 6.4 gph, 3.2 mpg, range 375
4000 RPM, 31 mph, fuel burn 13.1 gph, 2.37 mpg...