Leaking Hull-Deck Joint

[Sean Motta]

We have J/42 hull 50. Our hull deck joints in the V berth leaked fairly substantially on a recent particularly wet slog uphill. 

Has anyone done anything with these? How’d you access them, prepare them, and what did you use to reseal them?

Any insight would be hugely appreciated

Sean Motta

USA 52910

J/42 Hull # 50

[S/V Sweet Ruca]

Trying to think positive. Is there any chance it is not the deck joint, but it could be coming from the anchor locker, through the top corners of the bulkhead where the wires run?

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[Sean Motta]

This isn’t entirely impossible. Just seems to be dripping down the cherry paneling. Probably worth getting in there with a bunch of sealant anyways. 

Thanks for the thought. 

Sean Motta

USA 52910

J/42 Hull # 50

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CAGSa-zOzsVH-KWYuQheKdggtsSz785wPQD20m0D53x77KKw4tg%40mail.gmail.com.

[Jason Chu]

I can tell you from experience, putting too much weight in the bow will cause you to take a lot more water over it going upwind which will quickly fill the anchor locker (drain or not). As the anchor locker fills, more weight is added to the bow making it worse.

Validating this hypothesis involved sitting on the bow (clipped in), opening the anchor locker, and staring at the water level as waves are crashing over your back.

Once the locker is filled, it will leak through the corner holes, down the v-berth paneling, into the bilge and through the floorboards (because on a heel the low spot is under the water tanks). Unless someone has modified the water tank vents, it will also contaminate your tanks.

Not sure how wet it still is, but you can tell if you take the paneling off the ceiling and see where the water is coming from.

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CAOOqqYZVdSPO_r2UtKDwCGFsUdAUpn_Lg5Ah7NP50FoQTnanMw%40mail.gmail.com.

[Sean Motta]

Great points. This particular trip she was in cruise trim and definitely a little chunky, but she does the exact same in her entirely stripped race trim. I’m sure one of my bow team will love your recommended investigative protocol!

Sean

Sean Motta

USA 52910

J/42 Hull # 50

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CAFFHUgtVK%2BB9n4zwx-T-mqntzxs4sDY8eVuKKWTPxFfj2EXmEA%40mail.gmail.com.

[John Burnett]

We had water coming through from the chain locker where the cables and hoses pass through the bulkhead.  It dripped down the inside of the hull  behind the wood trim. I chalked the top corners to stop it.

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CAGSa-zOzsVH-KWYuQheKdggtsSz785wPQD20m0D53x77KKw4tg%40mail.gmail.com.

[Bill Bowers]

We previously posted on the former group our bow rebuild. Removed all hoses and wires from locker bulkhead, epoxy sploge filled the upper corners, epoxy glassed entire bulkhead to make it watertight, added watertight bulkhead hose and wire fiitings, moved windlass contactor to vee shelf, enlarged existing and added a second aft facing scupper, cross connected tank vents to teed outlet well above forward head shower pan.  Never again collect water in locker, hear loud slurping at speed from twin venturi scuppers. 

Bill Bowers J42 #3

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CAOOqqYaNzUCuOgx%3D9N1Z-ifayt9%3D7vG9CbrtN37jh_ZCi4WLEw%40mail.gmail.com.

[WSC]

I didn't have quite the enthusisam to solve this as others, but I did (re)create these anchor locker plugs, which have been a pretty good deterrent for ingress.   Think I posted a while back about getting these 3D scanned so they could be easily replicated, so happy to send one out to anyone with a scanner in exchange for it's return and publishing the cad file. 

Sean C  - VIDA J/42 #1

[jeff thayer]

I would be happy to create CAD from one of these and can print copies as well.  (PLA plastic from a fused deposition modeler)

Jeff

po box 371262

Montara, Ca, 94037

SV Allez, J/42 # 46

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/ff661377-62ce-4ca1-857f-656ce8535fb3n%40googlegroups.com.

[Jason Chu]

3d printed plugs would be better than my solution, which was most of a tube of 4200 applied at anchor in a French Polynesian atoll...

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CANaLt8KFhHvSiKTqj1ZrhfLtUGgNH2KuEhz4gpf_7gCyBKHU-w%40mail.gmail.com.

[Todd Stevens]

Better than my Nerf balls too...

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CAFFHUguUHxMEtfAcWU-ava%2B%2B6%3DOOR7pw6QPWahFTMWBfLYZHVA%40mail.gmail.com.

[Bud Cary]

I would be interested in that … although in my case (see attached picture) I also have rollers that I do not use (not yet at any rate), and would like to be able to seal the whole area off

 

Thks

 

Bud

 

SV Pooh, J40  #82

 

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CANaLt8KFhHvSiKTqj1ZrhfLtUGgNH2KuEhz4gpf_7gCyBKHU-w%40mail.gmail.com.

[jeff thayer]

Bud, If you can take careful measurements, I can do a version for that config too.  

Looks like the rollers are flush w/ the deck? 

would need the width and length of the opening they create in front of the anchor locker.  

Jeff

SV Allez

J/42 #46

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/BN6PR16MB310776A3A1B17497B22817FCFC112%40BN6PR16MB3107.namprd16.prod.outlook.com.

[Sean Motta]

I think a plug would be a nice help. I’m also likely to add additional drains as others have suggested. 

S

Sean Motta

USA 52910

J/42 Hull # 50

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CANaLt8%2Bu1TdRosdbEechVfNzJtFDOTEPxn99QarFrWaZ_dLb7A%40mail.gmail.com.

[WSC]

Jeff - sent you a direct message last week.  I'm going to send you one of these plugs per your suggestion and will send tracking # once it ships.  thx so much!

Sean C

[jeff thayer]

Great.  Happy to make these for any that want them...for the cost of shipping.   

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/bbff9992-5d4f-450d-b1f5-8efd8860b78fn%40googlegroups.com.

[Bud Cary]

I was wondering whether anyone else has dealt with the following issue

 

I am in the process of replacing the mixing elbow on my Yanmar 3JH3E, and have come across a problem that I had not foreseen

 

The flange of the replacement elbow (stainless steel from HDI) that is bolted to the heat exchanger is thicker than the original OEM unit that I removed such that I can’t tighten the lock washer and nut down far enough down to ensure they’re really secure. In other words, the nut will not tighten down far enough to expose a couple of threads of the stud. In fact, the stud does not protrude beyond the outside edge of the nut

 

HDI has indicated that I can either replace the studs with slightly longer ones or that I don't really need the lock washer in this instance which may give the nut just enough purchase on the stud to securely hold it in place.

 

My questions are:

 

Is a lock washer absolutely needed, recommended but not necessary, or can I skip it as HDI suggests which would be a simple solution ?

 

How easy is it to remove the studs on a 20 year old engine (with just under 2500 hours). I’ve seen the two nut or specialty tool videos for removing old studs (8mm 1.25) but my concern is if I try to remove them and somehow break or damage any because they are too frozen in place, is it a big job to then drill them out or otherwise get them removed? Is there a risk that the entire heat exchanger would need to replaced?. As a note my engine is under the companionway but access to the back end of the heat exchanger where the mixing elbow goes is pretty decent but replacing the heat exchanger could be a bear.

 

Thanks in advance to any thoughts or ideas on how to address

 

 

Bud

 

(#82, sv Pooh)

[S/V Sweet Ruca]

Sounds like you can probably “get by” with some red loctite in place of the lock washer, as long as the stud engages all the nuts threads. However…

Studs really aren’t any harder to remove than bolts with the proper tools.

If your studs have corrosion issues that could cause them to break on removal, you surely don’t want them in there anyway long term. 

I’d probably hit them with a little heat and the proper size stud puller or impact stud puller. Heat is your friend, as the surrounding aluminum will expand faster than the stud, and break any thread locker that may be there. 

If you are venturing across oceans, do it right the first time and have no worries at sea.

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[jeff thayer]

Thanks to help from Sean Conner (Vida, J/42 #1) we now have a CAD design for the anchor locker hawser ports for the J/42.  Anybody wants a set, (3D printed) please reach out.   I am also happy to share the CAD files for those that want to make their own.   

Thanks to Bud Cary of Pooh (J/40 # 82) we also have the same for the J/40.  But, Pooh seems to have "hand crafted" hawser openings, so you might want to do a hand tracing of yours and send to me before we make more.

Jeff Thayer

SV Allez, J/42 #46

[david hills]

HI Jeff,

I would like a set. 

Please let me know how much and where to send?

Thanks,

David

SV Raven, J/42 #73

David Hills
Caretaker
Emery Farm
www.emeryfarmstays.com
135 Piscataqua Rd
Durham, NH  03824
603-674-6412

I am my own strength, there is no other.
I am my own weakness, there is no other.
We are all one, there is no other.

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/1fa036f3-9f14-4b5b-be67-e9d413364efbn%40googlegroups.com.

[William C. Wohlforth]

Same here!

 

And big thanks to you and Sean for your effort on this.

 

Cheers,

 

Bill

Hotspur, J/42 #71

 

From: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com> on behalf of david hills <davideh...@gmail.com>
Date: Wednesday, March 12, 2025 at 3:13 PM
To: J42 Owners Group <j4x-owne...@googlegroups.com>
Subject: Re: [J/4X-owners] Leaking Hull-Deck Joint

You don't often get email from davideh...@gmail.com. Learn why this is important

Sean

Sean Motta

 

USA 52910

J/42 Hull # 50

On Sun, Jan 5, 2025 at 22:47 Jason Chu <xen...@gmail.com> wrote:

I can tell you from experience, putting too much weight in the bow will cause you to take a lot more water over it going upwind which will quickly fill the anchor locker (drain or not). As the anchor locker fills, more weight is added to the bow making it worse.

 

Validating this hypothesis involved sitting on the bow (clipped in), opening the anchor locker, and staring at the water level as waves are crashing over your back.

 

Once the locker is filled, it will leak through the corner holes, down the v-berth paneling, into the bilge and through the floorboards (because on a heel the low spot is under the water tanks). Unless someone has modified the water tank vents, it will also contaminate your tanks.

 

Not sure how wet it still is, but you can tell if you take the paneling off the ceiling and see where the water is coming from.

 

On Sun, Jan 5, 2025 at 7:37 PM Sean Motta <sean...@gmail.com> wrote:

This isn’t entirely impossible. Just seems to be dripping down the cherry paneling. Probably worth getting in there with a bunch of sealant anyways. 

 

Thanks for the thought. 

Sean Motta

 

USA 52910

J/42 Hull # 50

On Sun, Jan 5, 2025 at 22:36 S/V Sweet Ruca <rucas...@gmail.com> wrote:

Trying to think positive. Is there any chance it is not the deck joint, but it could be coming from the anchor locker, through the top corners of the bulkhead where the wires run?

 

 

On Mon, 6 Jan 2025 at 12:27 PM Sean Motta <sean...@gmail.com> wrote:

We have J/42 hull 50. Our hull deck joints in the V berth leaked fairly substantially on a recent particularly wet slog uphill. 

 

Has anyone done anything with these? How’d you access them, prepare them, and what did you use to reseal them?

 

Any insight would be hugely appreciated

Sean Motta

 

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/3665ACE6-E10D-4659-9CC1-DE3594900285%40gmail.com.

[WSC]

Jeff runs a precision operation - these turned out awesome! 

Sean C

[jeff thayer]

Bill, I'll need a ship to address....

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/SN7PR03MB711987F31EE5AC5331D20A8DABD02%40SN7PR03MB7119.namprd03.prod.outlook.com.

[Sean Motta]

These look fantastic. I’d love a set. J/42

Sean Motta

Davis Island Yacht Club

1315 Severn Ave, Tampa, FL 33606

Let me know where to send money

Great team work, guys. 

Sean Motta

USA 52910

J/42 Hull # 50

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CANaLt8Kia%2BA4bsq_%3DTBRcQeQ-68TTua1rm5%3D09ykkqvrHG6NSQ%40mail.gmail.com.

[Bud Cary]

With great appreciation for doing, and admiration for design quality and execution, I am happy to say the version made for Pooh fit perfectly!

 

Thanks again Jeff

 

Bud Cary

SV Pooh,  J/40  #92

 

From: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com> on behalf of jeff thayer <jeff.fo...@gmail.com>
Date: Wednesday, March 12, 2025 at 1:53 PM
To: J/4X Owner's Group <j4x-owne...@googlegroups.com>
Subject: Re: [J/4X-owners] Leaking Hull-Deck Joint

Thanks to help from Sean Conner (Vida, J/42 #1) we now have a CAD design for the anchor locker hawser ports for the J/42.  Anybody wants a set, (3D printed) please reach out.   I am also happy to share the CAD files for those that want to make their own.   

 

Thanks to Bud Cary of Pooh (J/40 # 82) we also have the same for the J/40.  But, Pooh seems to have "hand crafted" hawser openings, so you might want to do a hand tracing of yours and send to me before we make more.

 

Jeff Thayer

SV Allez, J/42 #46

On Tuesday, January 7, 2025 at 8:45:44 AM UTC-8 jeff thayer wrote:

I would be happy to create CAD from one of these and can print copies as well.  (PLA plastic from a fused deposition modeler)

 

Jeff

po box 371262

Montara, Ca, 94037

 

SV Allez, J/42 # 46

 

On Tue, Jan 7, 2025 at 1:53 AM 'WSC' via J/4X Owner's Group <j4x-owne...@googlegroups.com> wrote:

I didn't have quite the enthusisam to solve this as others, but I did (re)create these anchor locker plugs, which have been a pretty good deterrent for ingress.   Think I posted a while back about getting these 3D scanned so they could be easily replicated, so happy to send one out to anyone with a scanner in exchange for it's return and publishing the cad file. 

Sean C  - VIDA J/42 #1

On Monday, January 6, 2025 at 5:56:36 AM UTC-5 Bill Bowers wrote:

We previously posted on the former group our bow rebuild. Removed all hoses and wires from locker bulkhead, epoxy sploge filled the upper corners, epoxy glassed entire bulkhead to make it watertight, added watertight bulkhead hose and wire fiitings, moved windlass contactor to vee shelf, enlarged existing and added a second aft facing scupper, cross connected tank vents to teed outlet well above forward head shower pan.  Never again collect water in locker, hear loud slurping at speed from twin venturi scuppers. 

 

Bill Bowers J42 #3

 

On Sun, Jan 5, 2025 at 10:50 PM Sean Motta <sean...@gmail.com> wrote:

Great points. This particular trip she was in cruise trim and definitely a little chunky, but she does the exact same in her entirely stripped race trim. I’m sure one of my bow team will love your recommended investigative protocol!

 

Sean

Sean Motta

 

USA 52910

J/42 Hull # 50

On Sun, Jan 5, 2025 at 22:47 Jason Chu <xen...@gmail.com> wrote:

I can tell you from experience, putting too much weight in the bow will cause you to take a lot more water over it going upwind which will quickly fill the anchor locker (drain or not). As the anchor locker fills, more weight is added to the bow making it worse.

 

Validating this hypothesis involved sitting on the bow (clipped in), opening the anchor locker, and staring at the water level as waves are crashing over your back.

 

Once the locker is filled, it will leak through the corner holes, down the v-berth paneling, into the bilge and through the floorboards (because on a heel the low spot is under the water tanks). Unless someone has modified the water tank vents, it will also contaminate your tanks.

 

Not sure how wet it still is, but you can tell if you take the paneling off the ceiling and see where the water is coming from.

 

On Sun, Jan 5, 2025 at 7:37 PM Sean Motta <sean...@gmail.com> wrote:

This isn’t entirely impossible. Just seems to be dripping down the cherry paneling. Probably worth getting in there with a bunch of sealant anyways. 

 

Thanks for the thought. 

Sean Motta

 

USA 52910

J/42 Hull # 50

On Sun, Jan 5, 2025 at 22:36 S/V Sweet Ruca <rucas...@gmail.com> wrote:

Trying to think positive. Is there any chance it is not the deck joint, but it could be coming from the anchor locker, through the top corners of the bulkhead where the wires run?

 

 

On Mon, 6 Jan 2025 at 12:27 PM Sean Motta <sean...@gmail.com> wrote:

We have J/42 hull 50. Our hull deck joints in the V berth leaked fairly substantially on a recent particularly wet slog uphill. 

 

Has anyone done anything with these? How’d you access them, prepare them, and what did you use to reseal them?

 

Any insight would be hugely appreciated

Sean Motta

 

To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/1fa036f3-9f14-4b5b-be67-e9d413364efbn%40googlegroups.com.

[William C. Wohlforth]

Folks,

 

Wondering if any might share experience on adding AIS to J42. Wondering about things like unit placement, wiring, etc. The boat has a Raymarine C120 at the helm, and no plotter down at the NAV station. I had good luck with Garmin AIS 800 on my previous boat. Did not require an external GPS antenna and was simple to install.

 

  (I only trouble you with this because having just purchased the boat I’m a 9 hr drive away, and so the more information I have prior to getting back aboard will help. Would be nice to have AIS for the 650 mile nonstop delivery, though it’s not an absolute requirement.)

 

 

Thanks!

 

Bill

Hotspur J-42 #71

[Michael Moradzadeh]

I just installed an em-trek AIS.  Will post some details this evening.

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[Sean Motta]

Ours is installed in the nav station panel. It does have an external antenna which I ran to the stern with the others. I use a splitter to share the mast head antenna. Ours is a Vesper. They’re all an easy install

S

Sean Motta

USA 52910

J/42 Hull # 50

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[Todd Stevens]

There are many permutations to this question, but for what it's worth:

I’ve added EM-Trak AIS units to two boats, including my J/42. The newer units don’t require a separate antenna splitter.  Still, they are an add-on to the VHS radio system, so should be located near the primary VHS.  Mine is mounted on the back wall of the nav station electronics cabinet. In that position it does not require an external GPS antenna, usually, but it can benefit from one.  A USB data port and broadcast/silence switch are easily added to the front/control panel of the cabinet.  I eventually added an external GPS antenna, just under the forward edge of the dodger, along with the wireless wind instrument antenna.

Another possibility is to replace your VHF with a unit that has an AIS transponder built in.  

I’ve recently upgraded to NMEA 2K instruments, so the output just plugs into a nearby network drop.  For older 0183 stuff, (e.g. your helm chart plotter) you’d have to run a separate cable all the way back.  I hate running cables so much, I might consider making this part of a bigger upgrade.  Or pull an NMEA2K cable at the same time and save yourself some future pain. 

BTW, the EM-Trak seems to pick up much weaker signals than my separate VHF that also has an AIS receiver.  IDK why - they are using the same antenna.  (Last week, some boat in the anchorage had an AIS SART beacon triggered. Nobody on board. Marina sent message to owner but no response.  If only the VHF was turned on , the radio would alarm maybe once every couple of hours.  If the whole network was fired up, new alarms would sound every two minutes.  This went on for 9 days until the battery of that device ran down.)   

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[Gary Hooper]

On Raven (J/42 #73) the AIS transceiver is in the VHF mounted on the nav station panel and the AIS antenna is mounted nearby in the aft cabin closet along with the GPS antenna without loss of signal.  The VHF antenna (mast-head) cable is connected to a splitter so you can easily switch to the back-up VHF antenna mounted on the radar post if needed…something to think about if you are going off-shore (required for N2B).

Sent from my iPad

On Mar 20, 2025, at 12:51 PM, 'Todd Stevens' via J/4X Owner's Group <j4x-owne...@googlegroups.com> wrote:



To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/5844C479-4A3E-4ABC-95FF-0B017CAB01FD%40me.com.

[Rod Deyo]

We've been very happy with our Vesper Watchmate  Vision 2 Class B AIS transponder and Vesper antenna splitter for use with the masthead VHF antenna (it has a dedicated GPS antenna for redundancy). The Vesper AIS is networked on NMEA 2000 to provide AIS targets to our B&G MFDs along with GPS 

The Vesper is kept on constantly when we're transiting and at anchor since it provides a very nice low-power anchor watch as well as AIS information and location.

We've use an ActiSense NMEA 2000 to NMEA 0182 bridge to send GPS data to our ICOM 802 SSB, ICOM 604 VHF and Pactor 7800 modem, but recently upgraded to the newer ICOM IC-m510 with NMEA 2000 and AIS receiver for AIS target redundency.  I keep hoping ICOM will one day soon release a fully integrated VHF-AIS Class B transponder. They're getting closer....

Rod Deyo 

J/42 Norther Lights (#61)

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Rod Deyo

[William C. Wohlforth]

Hi all,

 

Many thanks for these replies/thoughts.  The VHF/AIS combo idea is neat but to keep the job simple would have to be drop in replacement for my current ICOM IC-M602 . ..  Very helpful to know that, for initial install, a unit installed at back wall of the nav station electronics cabinet will work w/o external GPS antenna—though I know that would be preferable in long run. And also great intel that AIS & GPS antennae mounted in the that aft cabin closet would get signal.

 

Will need to arrive to boat armed with a lotta NMEA 0183 wire!

 

 Given time constraints, you can imagine how valuable info like this is to me.  Very grateful.

 

Cheers,

 

Bill

 

Hotspur J/42 #71

 

From: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com> on behalf of Rod Deyo <roder...@gmail.com>
Date: Thursday, March 20, 2025 at 2:57 

PM
To: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com>
Subject: Re: [J/4X-owners] J 42 AIS install

You don't often get email from roder...@gmail.com. Learn why this is important

.
To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/CANkaZYSqYBSaGNV1%2ByoxUt9MkQ_QeK35dQvZx0XHOnQe%3DyaADQ%40mail.gmail.com.

[Ed Sitver]

Bill,

I can’t comment much on the networking bits, since all I know is my setup (and barely, at that). All relevant devices get the data via B&G networking (mostly NMEA2000).

Antenna went under the seahood (in the “bump” above the companionway), along with a GPS antenna and something else that I’m forgetting. Works great, out-of-sight, well protected, short cable run from electrical (nav station) cabinet. It did require very minor carpentry to fit all cables behind moulding in the quarter berth, but I remember the cable run being otherwise very straightforward. 

I’m also very happy with Vesper Marine (Cortex), although they are now owned by Garmin, so we’ll see how that goes. I have two connections in the electrical cabinet for a VHF antenna (AIS and radio had dedicated antennas at stern rail and masthead), but currently using a splitter on the masthead antenna. I’d originally put the radio on the integral splitter in the Cortex when the masthead antenna failed underway, and it worked so well I now run the AIS and VHF radio through the splitter to the masthead (there is slight “delay” in transmit/receive, as with any splitter, but negligible with the Cortex, as long as you’re aware of it). 

A user friendly and reliable anchor alarm was a big draw for me regarding the Cortex. I was looking for a low power draw anchor alarm that wasn’t dependent on an app on a mobile device. Cortex does a great job for this and for remote monitoring of this and other systems (could be used to remote monitor a bilge alarm/monitor, for example).

Ed

[Michael Moradzadeh]

My own philosophy is that I do not prefer combination devices, particularly when they are safety devices (VHF, AIS). In any case, I carry a backup antenna that can be used in case the masthead one turns out to become unusable.

This spare antenna turned out to be a critical bit of gear in a rescue I coordinated mid-pacific where the rescuee's VHF antenna somehow went away in a storm.

Michael

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[Todd Stevens]

Hey, just wondering if the anchor locker plug project is still on? Sent my address a few weeks ago and haven't heard back. 

I'm headed back to the states in a couple of weeks to renew my visa and it would be nice if a set could find its way to my mail drop by then.

But I also wonder how they've been working for those who have been using them? Since that hatch has neither gasket or sill-drain, like the ones on the poop deck, it's never going to be totally dry.  S/V Wild has been beating into the prevailing winter northerlies in the Sea of Cortez for the last couple of weeks and has been taking a LOT of water over the bow. (Of course, now that it's time to turn around and start heading toward the airport, the spring southerlies seem to be kicking in.)

Thanks,

Todd

J/42 Wild

[Dick York]

All-

Michael knows this, but I thought some of you might want to consider this when choosing the masthead antenna with a splitter vs. a separate AIS antenna on a rail mount.

If you have a Man Overboard, and they are wearing an AIS unit they will be broadcasting their position from about 4 inches above the water.  If you have your AIS reception from a masthead antenna, then you will probably be able to read them from 2 miles or so away... three plus if you are lucky.  

If your AIS reception antenna is only on a rail mount, that distance drops considerably.  Remember, you are limited to line of sight with AIS.  There is no distance calculation that works here, as the height of waves will block your reception as well as the curvature of the earth (ref. MOB during the Sydney-Hobart race).  

Thus US Sailing's Safety at Sea training strongly recommends you have your AIS reception done by a masthead antenna, assuming the cable is large enough.  If you are wondering about the size of your cable, Michael or I can get you the definitive paper on that.

Thank You ... Dick York   J/46 #9 ARAGORN

and chair, US Sailing Safety at Sea Committee

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[Ed S]

Both is good too. 

By happy accident, I acquired a splitter when I installed my Vesper Marine Cortex. I have an antenna installed at the masthead, and above the RADAR dangling from my backstay (I have a love/hate relationship with the Questus pole). I was initially running the AIS through the VHF antenna at the backstay (about 8 or 10ft above the deck) and the radio via the masthead. AIS reception was adequate and I didn’t suffer any conflict between the VHF radio and AIS. 

When my masthead antenna failed, I was able to simply move the radio antenna connector in the electrical cabinet from the masthead to the Cortex splitter in seconds, giving me near-range radio reception/transmission until I was able to troubleshoot and resolve the masthead. I now run them both through the masthead, because the splitter worked so well, but I leave the backstay antenna in place as a better backup than the dinky emergency antenna I also carry. 

Tangentially, ensure you seal up the masthead connection for your VHF cable. My failure was due to water intrusion into the cable (protected only with electrical tape), which made its way down the cable to corrode the below deck connection. I pulled a new, upgraded cable when the mast was next out of the boat, assuming there may have been other areas of corrosion along the cable run, and I seal the connector with self amalgamating tape. 

And the best lesson-learned I have to offer, is to troubleshoot from the ground up, rather than having a needless sightseeing excursion up the mast, as I did I that case. 

Ed 

------------------------------------
Ed Sitver
esi...@gmail.com
WhatsApp:  +1 303-570-5071
Mobile: +1 303-570-5071
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[S/V Sweet Ruca]

Good points! 

Also of consideration I have found is the wattage of the AIS, 2w vs 5w (b vs b+). 

Also, makes a difference for Satellite AIS reception in a SAR situation or long range via Marine traffic or predictwind

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[Todd Stevens]

Not sure how these two threads on completely different topics got joined together into some kind of unholy union.  But.

If you want your AIS to show up on satellites, you may have to plug it into your computer, go into the configuration software (e.g. ProAIS2), and enable the second transmission channel.  (There will be a check box once it is connected to the unit. It may say “enable message 27” or “enable long range” or some such.)  I’d have to open the cabinet and plug in to refresh my memory.  But itt’s not set by default on EM-Trak units.  

As a last resort, RTFM.

Todd

J/42 Wild

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[William C. Wohlforth]

Todd: Yes, It is bizarre: the “Leaking Hull-Deck Joint” thread (which ended up getting into the anchor locker plugs) and the “J42 AIS install” thread merged somehow.

 

On your earlier inquiry, I communicated with Jeff Thayer (jeff thayer jeff.fo...@gmail.com) and, for the cost of shipping, did indeed receive the plugs. So I believe that unbelievably kind offer is still on.

 

Cheers,

 

Bill

Hotspur J/42 #71

 

 

From: 'Todd Stevens' via J/4X Owner's Group <j4x-owne...@googlegroups.com>
Date: Thursday, April 10, 2025 at 10:13 PM
To: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com>
Subject: Re: [J/4X-owners] J 42 AIS install

.
To view this discussion visit https://groups.google.com/d/msgid/j4x-owners-group/F50E4D36-C044-4DB2-BAE6-5BDD94715EEF%40me.com.

[Bud Cary]

Jeff made a set for me and they were a perfect fit … see before and after pictures of J/40 Pooh (#92) .. I tried painting Jeff’s pieces and they need touching up or may just remove the paint

 

Bud

 

 

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[Sean Motta]

He made me a set and shipped to Tampa. A perfect fit. What a generous offer and great service for the community!

Sean Motta

USA 52910

J/42 Hull # 50

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[Michael Moradzadeh]

As it turns out, AIS can be picked up directly by satellite  Not perfectly reliably, but fairly so.  I have used it in coordinating a rescue a few years back.

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[ArntzFamily]

I would love to get a set of the anchor locker plugs for my J42, Bolero.  Is it Jeff Thayer who is making these?  

Mike Arntz

On Sunday, January 5, 2025 at 10:37:29 PM UTC-5 Sean Motta wrote:

This isn’t entirely impossible. Just seems to be dripping down the cherry paneling. Probably worth getting in there with a bunch of sealant anyways. 

Thanks for the thought. 

Sean Motta

USA 52910

J/42 Hull # 50

On Sun, Jan 5, 2025 at 22:36 S/V Sweet Ruca <rucas...@gmail.com> wrote:

Trying to think positive. Is there any chance it is not the deck joint, but it could be coming from the anchor locker, through the top corners of the bulkhead where the wires run?

On Mon, 6 Jan 2025 at 12:27 PM Sean Motta <sean...@gmail.com> wrote:

We have J/42 hull 50. Our hull deck joints in the V berth leaked fairly substantially on a recent particularly wet slog uphill. 

Has anyone done anything with these? How’d you access them, prepare them, and what did you use to reseal them?

Any insight would be hugely appreciated

Sean Motta

USA 52910

J/42 Hull # 50

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[jeff thayer]

Mike, I have one more set sitting on my desk.   Where shall I send them?

Jeff Thayer

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[Joe Murli]

Looks like you got plenty of great tips from several owners.  Not sure I can add any technical  information that isn’t already covered by other replies.  

That said I will add to the conversation that in my experience AIS is a total game changer in ocean passage making.  In the “old days” I would try to hail ships nearby to confirm

That they see us and to understand discuss each others intentions.  Response rate was dismal. Mostly just silence or at best abbreviated I information leaving you guessing as to their intentions.  

With AIS the response rate from ships has been excellent.  There is something about hailing a ship by name that makes them respond reliably and provide useful information as to who is going to do what.this  makes it safer and less frustrating for all parties concerned.  

I would never go back out to sea without a functioning AIS again!

Joe

J44 Sirena Bella

Sent from my iPhone

On Apr 10, 2025, at 11:59 AM, Dick York <york.r...@gmail.com> wrote:



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[William C. Wohlforth]

Could not agree more: we had same experience on our trip to Newfoundland a few years back.  In addition to what you day below re responses to VHF hailing, I worry that ship operators have become so used to AIS that they fail to keep as good a visual and radar lookout as in pre-AIS days.  So in a sense once a critical mass of vessels are AIS equipped, you kinda have to do it.

 

Very grateful to J4x owners for tips & suggestions.  Among many, that Em-Trak is a nice piece of gear, with its own multiplexer etc.  Really simplifies install . . .

 

Cheers,

 

Bill

J/42 Hotspur

 

 

 

From: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com> on behalf of Joe Murli <mysticpu...@gmail.com>
Date: Saturday, May 24, 2025 at 1:31 PM
To: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com>
Cc: j4x-owne...@googlegroups.com <j4x-owne...@googlegroups.com>
Subject: Re: [J/4X-owners] J 42 AIS install

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