My new to me boat originally came with a mercarb.... I ran the numbers and foun the mercarb to be for a larger engine specifically a 5.7 350 .. This is a 2 barrel carb and i realize that there are differences between the two such as jetting I was just hoping somepone could explain why the 5.7 oem mercarb would perform badly on a 3.0 mercruiser engine. I understand that it wasnt made for it so dont use it. Im just looking to be enlightened please. Any information is super appreciated.
