Yeah I doubt that might be possible since this boat looks to have a dangerous motor weight rating of what seems to be 900 pounds, and each 250 weighs about 588 pounds, while the 400 this boat has weighs in a 690 pounds. Maybe its do-able, however it might be extremely risky unless you want to stick with just 1 Yamaha 250... I am a human being and I make mistakes, so if I am wrong, please do point out so...