hynautic helm seal repair?

[hcalmar]

Losing some fluit at the helm. I looked back at my old thread (pictures are gone) and just like Genesis said the $00.50 O-ring lasted 5 years. I am trying to remember.Are there two O-rings? Do they go one next to the other? Just under the cap? Anyone remember the size?
Hal
I can't remember what I did yesterday.

 

[hcalmar]

Added pictures and scematic link.
Where do you see two o-rings in the scematic? I see one on the white plastic hub. Also, my shaft seal is split. The top dark plastic piece. Is that critical to stopping the leak? Does the whole thing have to be taken apart to replace it?

http://www.fishing-catalog.com/hynautics/h20.pdf