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Old 02-03-2015, 09:07   #1
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Question Reinstalling bow pulpit

I have a couple questions regarding the re-installation of the bow pulpit on my O'Day 22. I removed it last spring and due to health issues was unable to reinstall, but it is on the top of my list for this spring. My question is ~ When I set the mounting bolts back in, should I caulk/seal around the holes? use a rubber washer with the nut for sealing purposes inside the hull? Buy over sized ss "fender washers" to disperse the load under the hull attachment points? Am I overengineering this? I just want to make sure all is water-tight and the stresses at the attach points are minimized. THANKS!
Kevin
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Old 02-03-2015, 10:53   #2
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Re: Reinstalling bow pulpit

A couple pictures would help. But first you should make sure the core where the bolts pass thru are dry and sealed. If a solid surface (no core) then probably no problem.
Second, wher the pulpit meets the deck and anywhere else bolts pass thru, you should use 3M 5200 to seal around the contact areas and also around the bolts too.
On the underside a backing plate of about 3/8" should be used. I like G10 but 316L works too. The dimensions of the backing plate should be 1.5 times the contact area of the pulpit, if possible.

These are just suggestions not knowing what you really have.
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Old 02-03-2015, 11:02   #3
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Re: Reinstalling bow pulpit

Kevin - read this article and use the butyl caulk - works great. Re-Bedding Deck Hardware With Bed-It Butyl Tape Photo Gallery by Compass Marine How To at pbase.com
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Old 02-03-2015, 11:03   #4
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Re: Reinstalling bow pulpit

Good advice Del. In addition, would rout out the core material, fill the puka with thickened epoxy and redrill the holes. I use a Dremel 199 bit to clean out the core material. 5200 is great but LifeCaulk 4200, or butyl could also be used as a sealant. 5200 is a strong adhesive and might make removing the pulpit difficult in the future. Then again, may never need to remove it again. If any of the fasteners pass through cored areas, a leak would cause core rot that could spread to large areas of the deck. Whatever you do, caulk all fasteners thoroughly.
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Old 02-03-2015, 11:48   #5
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Re: Reinstalling bow pulpit

SATANíS GLUE


(3M 5200)


Should be banned from sale to unsuspecting mariners!

Use butyl tape.
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Old 02-03-2015, 11:56   #6
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Re: Reinstalling bow pulpit

Quote:
Originally Posted by Stu Jackson View Post
SATANíS GLUE


(3M 5200)


Should be banned from sale to unsuspecting mariners!

Use butyl tape.
Yep! That's the idea! so the darn thing doesn't move around under stress. Just like a keel.
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Old 02-03-2015, 12:03   #7
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Re: Reinstalling bow pulpit

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Yep! That's the idea! so the darn thing doesn't move around under stress. Just like a keel.
IMHO, the only place 5200 should be used on a boat are keels and the hull to deck joint.

If you've ever whacked a bow pulpit and needed to have it replaced, you'd rethink 5200 in a heartbeat.
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Old 02-03-2015, 12:09   #8
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Re: Reinstalling bow pulpit

Removing a bow pulpit put on with 5200 is easy--all you need is a filet knife, a block of wood, and a hammer. Whatever you do, don't use one of the admiral's kitchen knives...I'm still getting grief after 10 years.
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Old 02-03-2015, 12:40   #9
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Re: Reinstalling bow pulpit

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Originally Posted by Sailorman Ed View Post
This.

Our bow pulpit also required a workbench and ball peen hammer to flatten out the mounting disks, which had been bent at some point by a previous owner. A neighbor saw us working and asked where to get the butyl because he also believed this to be the best method.
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Old 02-03-2015, 15:34   #10
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Re: Reinstalling bow pulpit

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Originally Posted by Msgt3227 View Post
I have a couple questions regarding the re-installation of the bow pulpit on my O'Day 22. I removed it last spring and due to health issues was unable to reinstall, but it is on the top of my list for this spring. My question is ~ When I set the mounting bolts back in, should I caulk/seal around the holes? use a rubber washer with the nut for sealing purposes inside the hull? Buy over sized ss "fender washers" to disperse the load under the hull attachment points? Am I overengineering this? I just want to make sure all is water-tight and the stresses at the attach points are minimized. THANKS!
Kevin
Yes you should make sure the holes are clear and clean. Bed the outside surfaces with 4200 (sorry Del gotta disagree on 5200). Use large area washers or even better backing plates of aluminum or stainless.

People have an expectation that pulpits stanchions and any stainless bars on deck are reliable hand holds and the should be, hence backing area washers or plates.
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Old 02-03-2015, 16:44   #11
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Re: Reinstalling bow pulpit

You can also use 1/4" fiberglass for backing plates. Also butyl tape will work wonders, and if done right you will never look at the job again, and you will be able to remove the rail any time you want, and reinstall with the same.
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Old 02-03-2015, 16:54   #12
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Re: Reinstalling bow pulpit

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Originally Posted by delmarrey View Post
Yep! That's the idea! so the darn thing doesn't move around under stress. Just like a keel.

I would stay away from 5200. the next time you gave to remove the pulpit you would tear the gel coat off. There are many other types of sealant to use that are not so aggressive adhesive. My choice ups butyl tape.




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Old 02-03-2015, 16:56   #13
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Re: Reinstalling bow pulpit

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Originally Posted by Greenhand View Post
This.



Our bow pulpit also required a workbench and ball peen hammer to flatten out the mounting disks, which had been bent at some point by a previous owner. A neighbor saw us working and asked where to get the butyl because he also believed this to be the best method.

http://www.pbase.com/mainecruising/butyl_tape


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Old 02-03-2015, 18:15   #14
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Re: Reinstalling bow pulpit

Geeze! All this negativity towards 5200. Like I said w/o pictures it's hard to judge how to do the job. But working with 5200 is skill preference. If you don't know when or how to work with it, then by all means stay away from the stuff. Getting it off requires experience/know how.

And yes, my boat has butyl in certain locations as well but only 5200 is around the keel joint. I don't have a hull/deck joint anymore.

The problem I have with butyl is the greasy mess it leaves when it squeezes out on those hot days. Not to mention the only leaks I've had to date is where the butyl is. I normally use 4000UV for deck fittings.
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Old 02-03-2015, 18:46   #15
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Re: Reinstalling bow pulpit

DO NOT use a rubber washer on any holes. They will break down and leak. Plenty of Caulking will do the job. Yes, use the previous load bearing plates and you should be fine.
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