07-10-2016, 01:51 PM
I'm prepping for a long trip and want to plan fuel usage. I had thought I should be getting around 1 mpg at cruise. However I think I'm getting far less.
The boat has a very old analog floscan on one of the engines. It reads about 3-4 gph at 6 kts - basically hull speed just above idle, and about 18 gph at 22kts (about 31-3200 rpm). Doubling that for the two engines, that means I'm only getting about 0.7 stature mpg, and dropping down to hull speed seems to, if anything, make it worse.
Do these numbers sound right for carb'd 454's or is it likely my floscan is reading high?
The boat has a very old analog floscan on one of the engines. It reads about 3-4 gph at 6 kts - basically hull speed just above idle, and about 18 gph at 22kts (about 31-3200 rpm). Doubling that for the two engines, that means I'm only getting about 0.7 stature mpg, and dropping down to hull speed seems to, if anything, make it worse.
Do these numbers sound right for carb'd 454's or is it likely my floscan is reading high?
