To install the rubber flappers, I removed the tips, drilled the holes for the center rod, slipped the rod with rubber flappers attached in through the tip and positioned the rod out the drilled holes, pressed the brass centering ends on the rods and re-installed the tips. Simple as that!
However, since posting previously, on the first trip out this year I blew both the rubber flaps out the end of the tip. I need to call Eddie and see what they can do. My local dealer was no help and says that they no longer deal with Eddie. Actually, Eddie Marine no longer deals with them!
Hope this helps
Travis