| I am a big fan of Johnson Evinrude Triple-Guard Marine Grease.  It is blue and holds up for a long time in seawater.  You can find it on ebay at a resonable price.  I have tried numerous types.  IMO This is the seems to be the best underwater grease.   I am sure the Navy has something better but for what you can buy yourself it seems to work.
 Never tried anti-seize underwater, I would be most worried about wash out.
 
 The white lithium seems to cake up after a long period and any kind of regular bearing grease gets washed out quick.  There is a very sticky red grease that I picked up from NAPA and it seems pretty good too but I like the blue stuff better.  Volvo Penta makes a good prop grease it is a beige color not as sticky and seems to hang around for a season but over a long time (multiple seasons) it seems to disappear (it is expensive)  In any case if you pull the pins each season and re-grease you will never have a problem.  They will come out like butter each season now.  I
 
 I am glad you got them out with damage to the unit or finger like I did on my last one...
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