Winter through hull project

Nov 12, 2014
90
Jeanneau 42 Northport
Hope everyone is enjoying their winter projects in aticipation for summer. Only 162 days to go!

So I've completely gutted / cleaned my newly purchased 1989 voyage 12.5 and have started inspecting / mantnecing all of the through hulls.

When I purchased the boat I noticed that many of the through hulls had some hair line cracks around the base of them on the hull.

After exposing the kitchen sink through hull and salt water pump through hull I was a little surprised. See pictures for referance.
After some cleaning up I discovered that the though hulls washer baking and sealent were partially epoxied over. This explained why I was seeing cracks I suppose..

It looks like they used large washers as backers and a black sealant to ensure water tightness. This seems to be typically on all through hulls.

Anyone know wat this black sealant might be?

Are these washers good enough backing, I'm used to seeing blocks of wood?

So fare none are seized and they're cleaning up nicely, I rather not change out through hulls if they are working well..... but...

Should I replace them even if they look solid after cleaning / inspection. They are defiantly original.

After this is will be tackling the electrical system... it's nice to get stuff done before the season starts. Thank goodness for electric heaters


Read more: http://jeanneau.proboards.com/thread/4235/winter-projects?page=3#ixzz3wkXh6q8l
 

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Gunni

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Mar 16, 2010
5,937
Beneteau 411 Oceanis Annapolis
Fairly common production boat install. The thru-hull fitting is locked down by a threaded ring and and the valve is threaded onto the thru-hull stub. Looks like someone slathered dark epoxy on the fitting, and then painted the install to dress things up. Don't like the dissimilar metal, bronze and stainless.
 
Jan 27, 2008
3,092
ODay 35 Beaufort, NC
Go to MaineSail's website and follow the instructions for replacing through hulls and seacocks. http://www.pbase.com/mainecruising/replacing_thruhulls
There are some other instructions on this site also to help you prepare. Do it right so you won't worry about them. You can make backing plates with a jig saw or band saw or even an oscillating tool so don't assume you need a drill press.
 
Aug 3, 2012
2,542
Performance Cruising Telstar 28 302 Watkins Glen
That black stuff may be Dow 795. It is a flexible building sealant.