Suzuki 140 - Seacraft 20 - MPG @ Cruise

[Mark]

At 4000rpm, I'm going 26mph and burning 5 gph in a 1971 SC20 w/full 75 gallon tank, two adults on board, t-top, and full cooler [img]/images/graemlins/wink.gif[/img] I'm falling shy of the mark these charts are getting at the top end.

The three charts listed here only vary by 4mph at the top end, which I think is actually pretty close considering they are three different hulls and fuel capacities. At 4000rpm, the variance is once again within 5mph for three different boats. If 5mph is going to make or break that engine for you, I suggest buying a bigger engine?