Mo..right on..the consensus seems to be 3/4 to 1 gallon per hour. Those that can cruise around 1,900 RPM and get it to burn 3/4 gallon are in the sweet spot I think.
All that being said, my motoring is so inconsistent (and boat usage in general
) I have no idea my engine's consumption rate.
Kelly, on my late model, I found the first weekend I had it, I tweaked the bypass valve quite a bit to see its effects...after I got it set, I haven't touched it.