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Old 10-02-2011, 15:50   #1
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Catalina 27 Keel Bolt Reinforcement - Water when Drilling

Hi all,

I just bought a 1971 Catalina 27 and I planned to install some stainless lag bolts into the keel (as Catalina recommended) as the keel bolts are almost completely rusted away and providing no structural support. When drilling, I found that the wood core was wet and the hole I drilled filled with some water. There isn't a lot of water- the drill bit was wet and the hole slowly filled with water over a few hours and no water is coming into the bilge so it seems there isn't a major problem but I want to be sure the keel is soundly attached to the boat.

I'm thinking the water may be coming from a possible "Catalina Smile" a common delamination on the forward part of the keel or even from condensation being stuck in some pockets.

Does the wood core provide structural support ? And if so should I am planning to add a layer of epoxy layered with a glass cloth to prevent the lag bolts form punching through. Would this be sufficient?

I'm also concerned about corrosion between the lead keel and 316 stainless being enhanced with the water?


Any thoughts or recommendations appreciated!

Thanks,
Alexis
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Old 10-02-2011, 16:03   #2
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TAKE THE BOAT OUT OF THE WATER.
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Old 10-02-2011, 16:39   #3
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Could you possibly take some pics??

I agree with tager. Get that boat on land. I have a Cat 30 which I will be doing the same repairs on in a few weeks.

I don't have the Catalina Smile but I do have a spot where water could enter through the keel...I'll take a few pics tomorrow when it's light out and show you.
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Old 10-02-2011, 20:37   #4
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you are kidding, right? YES YOU HAVE A BIG PROBLEM.
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Old 11-02-2011, 02:16   #5
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I've made this repair before, you have one of a few possible situations, but all mean a leak between the keel and hull shell, so haul the boat and get it on the hard to start the process.
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Old 11-02-2011, 11:48   #6
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Here's one major reason to get the boat in the hard ASAP. It could also be a reason for the water intrusion.

I began sanding the bottom down to the barrier coat. I noticed a crack a few inches below the keel/hull joint. I chipped away at the crack and noticed that there was rust stains up against the lead (First Picture). The only place that is rusty on the entire boat is in the bilge. My keel bolts are almost completely rusted away. Once I was those rust stains I became really concerned.

My theory was that any water in the bilge was slowly finding its was down around the old keel bolts...not to mention corroding them along the way.

I opened up the crack even more and found huge rust stains (Second Picture).

The third picture is a close up. Notice some water seeping out of the keel/hull joint.
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Old 11-02-2011, 23:17   #7
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hmmmmmm let's see,
if i drill holes in a boat will it sink??
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Old 23-02-2011, 13:46   #8
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Re: Catalina 27 Keel Bolt Reinforcement - Water when Drilling

Quote:
Originally Posted by Alexis View Post
I just bought a 1971 Catalina 27 and I planned to install some stainless lag bolts into the keel (as Catalina recommended) as the keel bolts are almost completely rusted away and providing no structural support.

Any thoughts or recommendations appreciated!
Alexis --

If you can, haul the boat for the repair. There are 4 reasons for this:

1) To inspect the joint from the outside.

2) To put the weight of the boat on the keel, ensuring the tightest fit possible.

3) To be certain that the boat is level, so you don't inadvertently drill through the side of the keel.

4) To be sure your boat doesn't sink if #3 happens.

HOWEVER, if time and money make the haulout impossible, it can be done in the water. Just be sure to have someone sight the boat to make sure your mast is pointing straight up (with you on board and in position to starting drilling), which should mean that the keel is pointed straight down, and angle your drill ever so slightly toward the center of the bilge.

What size bolts and drill bit are you using?

Bon Chance!

John
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Old 24-02-2011, 04:23   #9
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Re: Catalina 27 Keel Bolt Reinforcement - Water when Drilling

If it was me, I would take the boat out of the water, for full inspection and repair. let us know how it goes.
Fair Winds
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