I have a 24' Offshore Pro Grady i'm going to repower. it's got a full transom with a twin bracket (original grady bracket). Hull weight is 3000 lbs, but throw in a hardtop, fuel/water tanks, gear and outboard(s) I'm problably well over 5000 lbs. I'm considering twin 150 carbed yamahas or a single 225 or 250 four stroke yamaha. Twin f150's are way out of my price range. I can get the double bracket swapped for a single for free, labor included. I bought the boat for offshore diving and fishing, so my instinct is to buy the new carbed 150's. But i have to admit, i'm drawn by the quietness, easy starting and fuel efficiency of the four stroke. I'd hate to think i'm 30 miles offshore, my engine goes south and i'm stuck waiting for a tow. Any thoughts and comments are appreciated.