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Hyrdflyr · 24-05-2020, 10:31

The first thing I would do is clean the whole mess up so I could see what I was looking at.........

**roverhi** · 24-05-2020, 11:13

Can't really see much other than the guys hand turning that fitting from the videos. Probably not because of the close tolerances but could it be a shaft zinc that has come loose??

captain465 · 24-05-2020, 12:02

Haul the boat, clean the bottom, new bottom paint, take the prop off, and disassemble whatever it is that you have a question about. discover how it is supposed to work, and repack if it is a packing gland.
Maybe ask the boat yard or the previous owner.

Dougtiff · 24-05-2020, 14:15

All very confusing, have never seen packing on the outside of a boat, and where is the cutlass bearing, on a strut ?, how do you adjust the packing if it's on the outside, haulout,dive ?, something not right here.

sanibel sailor · 24-05-2020, 15:28

Is that packing or worms and barnacle guts?
Either way, don't think I would sleep well until it is sorted out.

capt.rob · 24-05-2020, 16:04

can't tell the metal it's made of but it appears to be a collar zink that is loose. It is very commom to have one placed between font of propeller and shaft tube. especially when a cone shaped zinc prop nut is not used or won't fit without hitting rudder.

**Wotname** · 24-05-2020, 16:27

Quote:

Originally Posted by Hermia II

Unusual arrangement. If you have a stuffing box inside the boat then I would guess this nut holds a cutless bearing. The shaft has to be supported at the aft end. The most critical thing is if barnacles, or what have you, catches the propeller in revers and screwed the nut out (it will get tighter and tighter against the prop) Eventually it could perhaps pull the shaft aft long enough to make it part from the axle coupling. Your rudder would stop it sliding out, but you would be in trouble. Try locking it with Loctite 243 if there is no means of locking with a split pin, steel wire or the like.

Note - the prop is left handed so it will be turning CCW in forward. Of course we don't know if the mystery "nut" is RH or LH threaded (if its threaded at all)

My GUESS is that it isn't a nut at all, rather it is an anode of some sort and it's securing method has failed. As others have said, the whole shebang needs a dam good clean up and it's purpose will become self evident.

**JPA Cate** · 24-05-2020, 16:43

Do not post the same discussion more than once or in more than one forum.

In this case, the two threads have been merged.

**skipperpete** · 24-05-2020, 18:29

It looks like you have a grease filled sterntube because in a previous thread (2018?) when your inboard shaft seal came off completely no water entered via the naked stern tube. Surely there’s a facility where you can haul out and fix both the bottom paint issues and the sterntube nut, are you still in NZ waters. ?
Pete.