I've got twin I-4 200's on a 2016 2520 XLD. At 4000 rpm, getting 2 mpg, 15.5 GPH, and doing about 30-31 MPH, depending on sea state and tidal direction, of course. WOT, have seen close to 50 MPH at 6000 RPM, but that was on a speed run by myself going with the tide. Legit 45 MPH rig though. I think the Yamaha I-4 200's are great motors, and perfect propulsion for the boat.