Home › Forum › Ask A Member › Evinrude 5520 5.5 hp pistons › Re: Evinrude 5520 5.5 hp pistons
September 13, 2015 at 1:15 am
#23719
It is my guess that the blank core plug cavity is where the identification core plug would have been on older models. When they added the fuel pump mount, they also created a new cavity for the relocated ID plug. No reason to spend the money to remove the old cavity from the mold. Making changes to those casting molds is a very expensive thing to do.
That’s my story and I’m sticking to it–until somebody points out my error.