Hey guys new to the forum.. Hope someone here can help me out. I've done a impeller replacement on my outdrive before, but this time around when I was trying to attach the bottom housing to the upper housing it kept getting stuck. It felt weird so I decided to look up to where the shaft from the lower unit slides into I saw a broken O-Ring up where the spline is. I removed the O-ring and I am not exactly sure where it goes. It looks like it has a spring going around it. I googled and I think its called a "quad seal" but I am not exactly positive and from looking at the parts diagram I cannot make out which O-Ring it is. Hope someone can shed some light on this. Thank you for any help!