Leak in the cabin

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AndyO

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Sep 28, 2008
15
Hunter 30 Palatka
I have a leak on my 1981 H30 that is driving me crazy. When it rains, a steady leak comes in from above into the cupboard on the starboard side. It is not from the portlights. I've repeatedly poured water on the area above that part of the cabin, but have not been able to find the leak. Seems to leak only when it rains, not when I am trying to find it. Anyone have suggestions as to where to look? Thanks!
 
Nov 26, 2006
381
Hunter 31 1987 Fly Creek Marina Fairhope,AL.
sounds like i'd check toe rails. had similar issue with 1379 H-30.
 
Apr 3, 2007
73
H37 Cutter 37c L.A. (Lower Alabama)
Here's a method I used on an old Catalina:
1) Close everything except one dorade vent. Duct tape all the cracks.
2) attach a leaf blower to the dorade vent.
3) spray a soap solution all over the decks.
4) Pressurize the cabin with the leaf blower and look for bubbles.

The bigger the boat, the harder to seal all the "cracks", but worth a try. Just my $.02.
 
Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
Andy:

Good Luck!

Leaks can appear anywhere and they may not come from the area that you are expecting.

Regardless of the ports actually leaking, the port may be leaking around the trim ring. The toe rail is also a good bet. The mast step may be the culprit. The hand rails are also a good source of potential leaks. Oh ya, don't forget those chain plates. I hope you are getting the idea.

What cupboard are you referring to? Is that in the head or the galley area.

I would suggest that you start with one of these items and check them out. They may all be leaking so rebedding them all is not a bad idea. Just start with the easy ones first.

The toe rail can probably be torqued down one bolt at a time, but it will require a consenting adult to help you endure the torture of trying to fit into those very tight quarters.
 
Jun 21, 2007
2,108
Hunter Cherubini 36_80-82 Sausalito / San Francisco Bay
I have a 1980 Cherubini Hunter 36. A few months ago, I tightened all of the hull/deck bolts (i.e. the toe rail bolts that others have already mentioned). Reason was that my boat was leaking in the bow/V-berth area. I went to the boat during a rain-storm to investigate, and from the inside I could feel wetness along the hull/deck joint at several places. I have read that a proper fix is to remove the toe-rail, separate the deck to hull joint, put in new sealant and then tighten. But this is a big job, so I figured instead to first just tighten the bolts/nuts.

If the toe rail bolts have never been tightened on your boat, its something that probably will be useful. After 28 years, most of my toe rail bolts were no longer even close to being snug. Assuming that a 1980 H30 has the same toe rail and deck joint configuration as a 1980 H36, the tightening process is have one person on deck to hold the bolt from turning with a Phillips screw driver (to minimize damage to the caulk seal by the turning screw) … as the second person tightens the nut underneath. I didn't have a second person, so my solution was to clamp the screw head with a vice grip; aligning the vice grip in a manner that that it rests against the toe rail as the nut is tightened. You will need an extended length socket. Because of different accessibility positions for each location, you will also need several different lengths of socket extenders, and an universal swivel joint. Also for a few of the nuts, I needed to use a socket set fitting that looks like an open ended box wrench (sorry I don't remember what these are called).

My boat remains dry now during rain, even this week after the +/- 5 inches of rain we received in the San Francisco area over the past several days. One item that surprised me as I tightened all my toe rail nuts is that still pliable caulk (or butyl tape?) was squeezed out from under the toe rail edge on the deck. “Still pliable after all these years”. Another benefit for me after tightening the toe rail is that I no longer have what sometimes were alarming cracking and popping sounds from the hull/deck when I winched the jib sheets real tight. My jib sheet blocks are snatch-blocks attached to the toe rail.
 

AndyO

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Sep 28, 2008
15
Hunter 30 Palatka
Thanks for these great suggestions and tips. I'll start with the toerails this weekend.
 
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