I had a friend pick me up a carb float for my '56 3hp 'rude at a parts shop he was going to out of town. The one I took out was cork with a round hole in the middle; the one he brought me is made of some kind of black plastic or resin and the hole in the middle has a slight squared offset on one side. The size and shape are identical and it fit right into the carb pefectly. The dealer told my friend it is for a newer modle motor but would work the same in my '56 and it would outlast cork. The part number on the box is 0396514 and it is made by evinrude. Any reason this won't properly work in my motor ? -Thanks