Guy on another web site just reported in from his first sea trial. Below is his reaction:
"Just got back in from a boat ride with the new Garmin GFS10 fuel flow sensors. Them 454s like to suck gas!!! At only 3400 rpm (24.9 mph) each engine burns 15.3 gph (30.6 total gph) and the Garmin says that is 0.8 mpg total. WOW, I have had this boat for three years now, and thought she burned about 10-12 gph at 3400rpm."
My buddy--the former engineer--used to keep careful records on how much gas his 454 burnt--claimed 8 GPH as I recall. No Flo Scan. Asked him how he came to that conclusion, so he handed me his log book: Gallons added, total time between fill ups... "Do the math."
Of course, he neglected to subtract warm up, slip running at idle, no wake zone running, etc. And he was an engineer!
Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell