I have a 20 MA with a 406 lb Merc 200 - it will self bail without anyone in it- if one person 200# walks to the back some water will come in, then run out if they go to the console. I would recommend though be very careful to have a good seal on the splashwell access or any bilge access. 2nd have 2 completely separete bilge pumps wired direct too 2 different batteries- and even a high water alarm - they will wake the dead
Stay as light as possible, and as close to 400 as possible, stay away from that doggie 4S yammi the other 2 are fine