Twin 150 mercs on bracket set28" off back

[brushhippie]

I put a double Armstong bracket on the back of a Robalo...he was running V6s and I put the brackets as high as I could in the slash well...(without rebuilding the transom) and put them in the top bolts and he said when he came out of it, water would come up onto the cowling... Id bet if its an outboard boat...you will need to eliminate the splash well ..he eventually rebuild the transom and raised them up, I understand its not exactly the same but maybe that will give you some idea.