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Carver
 BoatUS Boat Groups/Manufacturer Forums>>Carver
Subject Topic: Question about 3007 & Depth Finder Post ReplyPost New Topic
 
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bfore
"Seaman Recruit"




Joined: April 22 2010
Posts: 2
Posted: April 22 2010 at 15:57 | IP Logged Quote bfore

To summarize...
I have a 3007 that the depth finder went wrong last year...
I believe it to be the thru-hull transducer has stopped working.
The unit is older, not worth fixing in my opinion (actually not even made anymore)...So I've been looking at options.
After some investigation, replacing with another thru-hull unit would be quite costly (the transducer are very expensive). I am also trying to avoid running a cable all the way to the transom for a transom mount transducer.
Was wondering, as i was given from a friend a in-hull transducer and dash mounted depth sounder, do they work??
Lots of chatter on the net about cored hull vs solid glass...is my boat solid?! I'm not even sure. I could use some advice here....
what to do? and of course, budget is limiting factor these days....

Thanks in advance
 

Edited by Sonja Lowe on May 27 2014 at 13:53
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glpowercruiser
"Seaman"




Joined: February 29 2008
Posts: 31
Posted: April 23 2010 at 00:01 | IP Logged Quote glpowercruiser

I have a 3207 of the same era and I believe they were built the same, so your 3007 should be cored only on the decks.  The hull is fiberglass, hand laminated with mat and woven roving in alternating layers.  If you have a survey, it will give you the construction, but I can put money down our hulls are the same.  Because of this construction, you should be ok with the "shoot-through the hull" transducer mounted inside your hull.  Make sure the transducer shoots the proper frequency and sends the proper signal for your sonar/fish finder unit.

Here are a few things to consider:  Location - place the new transducer on the other side of the hull (if the current is on the stpd side, install the new on on the port side).  Do this in case you or the next owner wants to add a new thru-hull in place of the old.  Forward looking sonars are getting cheaper and you or a future owner may want one of these units and the best idea is to install it where the old thru-hull is now.  Make sure the new transducer is as far from the original thru-hull transducer so there is less chance of signal interference.  Make sure it is at a location that has undisturbed water at planing speed (though some say shooting straight down may not always serve you well ast planing speeds - too shallow could be too late.  It definitely needs to work at slower speeds).  Installation Testing -  you can test the installation by using a good amount of vaseline to "stick" the transducer temporarily to the inner hull.  Run your boat over good known depths at multiple speeds to test.  Installation - Once you find the best location for best use, you can then clean the bilge area and glue the transducer in.  Many call for epoxy, but some say that silicone works well too or 3M 5200.  If you use epoxy, you can create a dam of silicone, so the epoxy will level.  The whole idea is to stick it so it shoots straight down and has no air bubbles below it.  Contact must be absolutely positive.  Air bubbles below it in the glue material or in that section of the hull layup will negatively affect the "shoot".

Hope this helps.

 



__________________
glpowercruiser@msn.com
Carver 3207
"Pouting Girl"
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glpowercruiser
"Seaman"




Joined: February 29 2008
Posts: 31
Posted: April 23 2010 at 00:05 | IP Logged Quote glpowercruiser

Also, watch out for the keel on the boat, you don't want to create a shadow for the side to side beam.

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glpowercruiser@msn.com
Carver 3207
"Pouting Girl"
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AWBoater
"Seaman Recruit"




Joined: November 09 2006
Posts: 8
Posted: April 23 2010 at 05:25 | IP Logged Quote AWBoater

Perhaps you may want to consider a depth finder using an Airmar P79 transducer. Airmar is OEM for the majority of depth finder instruments, and are available in a wide range of pinouts.

The P79 is probably the most popular in-hull transducer, and consists of a cup that gets siliconed to the hull, then the transducer fits onto the cup.  The cup has no bottom (the hull forming the bottom when it is siliconed).

Then you pour either mineral spirits or pink antifreeze into the cup, and this provides a bath that acoustically couples the transducer to the hull without worry of bubbles in the epoxy, etc.

However, it won't work through a cored hull.  My 1995 era Carver doesn't have a cored hull, but I understand some older Carvers did.

I understand that silicone is preferred as a "glue" in this instance as mineral spirits - if you use them, will attack other materials.  And the beauty of using silicone is that if you find the location is not sufficient, you can move it.

Finally, I located my P-79 transducer just forward of the water inlet on the starboard engine. You have to ensure that nothing disturbs the water flow, and for that reason, with inboard engines, a transom mount transducer is probably not a good location.

www.boat-project.com


__________________
'95 Carver 325 Aft Cabin
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bfore
"Seaman Recruit"




Joined: April 22 2010
Posts: 2
Posted: April 23 2010 at 11:16 | IP Logged Quote bfore

I will look into the P79....Thank you...
Also, i am considering (since i have a Hawkeye) doing a dual depth sounder installation....

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