Bobw, I do believe that black goo is the original sealer as well, it’s kind of hard to see but the second picture of my post which is looking straight onto the crank has a drip of oil startin onto of the snap ring. It would’ve been more noticable if I did not wipe it away before the picture.
I found both oem o-rings I need, what is the “quad ring” you mentioned? I’ve never heard of it.
This is the first (of about 8 in line) of the big twins I’ve taken down this far. Looking at the part on Marineengine. Com it looks like there is a rubber lip to the carbon seal, would it be wise to replace it along with the o-rings since I’m already there?
