Bunch Marine had mine upto 72....empty boat....Ive had it up to 68mph gps in Turkey Creek on Loudon with my 110 pound daughter in the boat and still had more left, but backed off...she wanted me to go faster...Havent had a chance to really open it up with a light load....Im runnin a 225efi with a 26p trophy+....12" J&B jackplate.....3.5 inches below the pad....with full TX load and my brother at 300 pounds and me 220...45 gallons gas, full live well...4 batteries.... it will run 64.8 all day on good water...I think it tapped 65 for a second one afternoon...I have a few good nicks in the prop from runnin in TXs all year, so Im sure it would be a bit slower at the moment...still be a good race though...Merc vs Yami