At wide-open throttle (6,100 rpm), the twin 250 hp four-stroke Yamahas pushed us along at 50 mph, using a total of 41.2 gph. A more conservative cruising speed of 35 mph cut that by more than half to 18.9 gph. I found that trolling on one engine worked really well, with the 600 rpm idle speed moving us at 2.5 mph. What this boat won't do is get up on plane with one engine. It's too husky for that. However, remember, in a nasty head sea, you'll appreciate that huskiness.