Everytime I put something on, I realize I probably have to use sealant or gasket, or o-ring. What is the deal here. I found on the exploded view drawings that the distributor needs an o-ring. The picture on AA and Pelican matches the shape and size of the one I got in my gasket kit. But how does it install? Does it replace the brown hard ring or just slide on and up?

Thanks,

Click to view attachment

Replace.
The old one used to look like the new one, many moons ago.

Zach

B is dead, old garbage. Cut it off with a razor blade and toss it.
A will stretch over the shaft and slide up. A should have a D cross section, not an O. The flat part goes against the shaft, and the rounded portion faces out.

Yes D x-section is a much better description. Thanks for the input, I am breaking out the blade.