Leak by Cockpit Table Light - What can I do?

[Larry F.]

I am replacing the 12V light fixture above my cockpit table. I recently purchased a 20-year-old boat (30 foot Catalina) and the light bulb fixture was corroded. When I replaced it I found out why. The fixture dripped water and one of the screw holes had a small leak in it. When I looked at the top of the boat there is no cracking or obvious place where there is a leak. This may just be condensation, but I am really not sure. I want to replace the light fixture, but also want to get rid of the drip. I have purchased some sealant (silicon-based) and plan to squirt some in the hole and let it set. Then since the sealant is malleable, screw the fixture in. Is this a good plan, or am I missing something?Thanks,Larry

 

[John J]

Leaks

Before you do that you may want to consider re-seating the chainplates and lifeline stancions. That is most likely you source of water. Let the hole dry our before you seal it up. Also, from the bottom use a hanger or other device to determine how far the water penetration goes. Hopefully it is only a minor problem. Good luck and enjoy your new boat.

 

[Todd Osborne]

Leak Vs. Condensation

I'd put a garden hose to the cabin top & give her a good rinse. Then look & see if the fixture is leaking. If not, then hopefully it is condensation.

 

[Ron]

Look for the leak

Just a guess,Do you have an opening hatch behind the mast step?Did you check the mast step for leaks?Try to find the water problem from above. Plugging the hole from the bottom might send water to a "hole" new problem.Silicone??Why not use 4200 sealant!

 

[Brian Giersch]

Migrating Water

With a leaky Catalina 36 I have had similar experiences. As the others are suggesting, water migrates horizontally and down. Check what ever openings are 'up hill' from the light fixture. If it is migrating from an overhead hatch or chainplate, etc, it may have infiltrated your deck core. You may find the leak, but also do some tapping across the surface of the deck. should you hear any hollow or soft sounds, rather than a crisp 'knock' you may have soggy deck core. Good Luck