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Trinidoc 08-18-2012 08:36 AM

Resealing the Stern Tube?
I've removed the Stern Tube on my OOD34 so that I can replace all the bolts before my new engine goes in. I was planning to use 5200 to reseal it but have been discouraged by a couple of friends. One told me to use a plain polysulfide the other has promised to bring some sort of bedding compound he swears by but I want to get the tube back on over this weekend and I have a couple tubes of 5200 on the boat already. Any reason why 5200 wouldn't work?

JimsCAL 08-18-2012 08:43 AM

Re: Resealing the Stern Tube?
Are you talking about the bearing? If so they are either held in place by set screws or it just a press fit.

FWIW, never use 5200 on anything you might want to remove in the future.

mjf55 08-18-2012 10:57 AM

I think he is talking about the tube going through the hull. On my Hunter 30, it is a bronze tube with 4 bolts and NO cutlass bearing. I am interested in the answer as I need to reinstall mine.
I have read that using 5200 will make it permanent and that's not a good idea. (Oops already was mentioned about the 5200)

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PorFin 08-18-2012 11:39 AM

Re: Resealing the Stern Tube?
5200 will work, but that's kind of like welding spark plugs into a gas engine. Works great, until the time comes to get them out -- and then you're talking about a real chore.

Listen to your friends, and use something less permanent than 5200. I'll even go a step further and suggest that you give away whatever stocks of 5200 you may currently have aboard so that the itch to use it in the future will not be easily scratched.

sww914 08-18-2012 01:06 PM

Re: Resealing the Stern Tube?
I used Sikaflex 291 or 292, can't remember- the fast one, because I wanted to be able to remove it again someday.

Trinidoc 08-18-2012 08:38 PM

Re: Resealing the Stern Tube?

Originally Posted by JimsCAL (Post 911150)
Are you talking about the bearing? If so they are either held in place by set screws or it just a press fit.

FWIW, never use 5200 on anything you might want to remove in the future.

No not the cutlass bearing - I already changed that (with lots of swearing). It's the bronze tube to which the dripless seal attaches.

The general consensus seems to be not 5200. I will look around for that Sikaflex. I guess I shouldn't use 5200 on my thru hulls either then as I'm about to change all of those as well.

Jgbrown 08-19-2012 02:28 AM

Re: Resealing the Stern Tube?
I think thru hulls is one of the places you probably would want 5200. Easy to get to for the most part when the boat is out of the water, and very sad if they let go :-)

It's one of the only places we use it at work. Otherwise it's 4200 or a specific goop for the specific job.

FSMike 08-20-2012 10:02 PM

Re: Resealing the Stern Tube?
I'm not too sure about 5200 under the waterline. I once sandwiched some additional ballast on a boat with a fiberglass covered wood keel, connecting the two ballast pieces by through bolting them. I gooped the bolts up with 5200. The boat sat for another couple of weeks before I launched her. About two years later I decided to replace the bolts. Lo and behold, they came out very easily. The 5200 was soft in consistency, like it had never set up properly.

Another time, I saw a fellow recaulk his boat (about 35' plank mono) using 5200. When launch day came his boat had to sit in the slings for 3 days before the leaking slowed down enough for his multiple pumps to keep up with it. Pretty mad yard owner too.

I'm not an expert on this subject, just food for thought.

Trinidoc 08-21-2012 04:07 PM

Re: Resealing the Stern Tube?
3 Attachment(s)
Ok I managed to get the stern tube down over the weekend. I used a bedding compound that came in a roll. I don't know the name of it as a friend gave me some and I don't think even he knows that correct name. Basically you roll it out and bolt down the tube over it. It compresses out like Plasticine and can be easily removed in the future as it remains pliable. I used a small amount of 5200 to seal the bolt holes as I will fibreglass those in on the outside so they will be water proof anyway.

jsaronson 08-21-2012 04:41 PM

Re: Resealing the Stern Tube?
looks like butyl tape. Stays pliable forever.

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