Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 21-05-2015, 12:02   #16
Registered User

Join Date: Dec 2014
Posts: 7
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

very cool idea..
__________________

__________________
Twilite is offline   Reply With Quote
Old 21-05-2015, 17:12   #17
Registered User
 
CarinaPDX's Avatar

Join Date: Jan 2010
Location: Portland, Oregon, USA
Boat: 31' Cape George Cutter
Posts: 1,673
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

Topic has been recently discussed, but some new info here so worth asking again.

I test mount using KY Jelly or similar; if it works well then it is easy to clean up and mount with silicone and if not easy to try again. I built up a flat and almost-level pad of resin in order to aim the transducer to the side of the keel. Even removing the puck with KY can be difficult once it dries due to the close fit; I had to use a chisel with silicone - I really like the dental floss idea. If you don't want to deal with making a resin pad then I would give the molten wax a try, but only after testing with KY first (removing the wax is going to be difficult).

The transducer pucks have come with epoxy in the past - don't do it!! You will have to destroy the puck in order to (re)move it.

Greg
__________________

__________________
CarinaPDX is offline   Reply With Quote
Old 21-05-2015, 17:41   #18
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,334
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

I have sanded smooth and epoxied the transducer inside the hull. Worked fine. Although it's epoxy, not like you cant get it off with a blow of the hammer. Assuming when you want to take it off it's toast!
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 21-05-2015, 23:34   #19
Registered User

Join Date: Mar 2015
Posts: 74
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

I have my lowrance elite 5 DSI transducer on the bottom of my bilge in my all aluminum striker not glued just sitting there with 2 soft dive weights on top of it an it works great.My bilge is dry all the time so i just fill it with 3 inches of fresh water.
__________________
Millions of dollars of Spanish treasure await those who would dare brave the eye of the hurricane.
Striker37 is offline   Reply With Quote
Old 22-05-2015, 00:07   #20
Registered User

Join Date: Jun 2014
Location: Earth
Boat: Amel Super Maramu 53 ft
Posts: 504
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

I've been interested... as I could not devise the solution.

Thank you all for the tips
__________________
Eleuthera 2014 is offline   Reply With Quote
Old 22-05-2015, 00:37   #21
Registered User

Join Date: Mar 2007
Location: Punta Gorda, Fl
Boat: Irwin 37CC -
Posts: 64
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

I mounted ours in a wet box made of a 4" PVC end with a screw cap filled with mineral oil, epoxied to hull just forward of the keel. Small slice in sidewall just enough too push wire through and sealed it with silicon. Has worked for 10 yrs with no problem. You mentioned you wanted to put it next to another through hull?? Watch for interference with each other if frequency is close...
Ted..
__________________
Ted and Relinda is offline   Reply With Quote
Old 23-05-2015, 10:20   #22
Registered User

Join Date: Nov 2011
Location: San Rafael, California
Boat: Marieholm 26
Posts: 18
Images: 1
Send a message via Skype™ to dannyjoh
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

My boat (26 feet fiber glass sailboat built in 1977) came with a brand new Hawkeye D10 in-hull depth sounder kit still in the package. I followed the instruction looking for a suitable spot all over the boat (including the bilge). No luck. The system works great when when I drop the transducer overboard. So there is nothing wrong with the functionality of the unit. This particular brand appears to be not strong enough for shooting and receiving signal through the hull of my boat. I am giving up on this one. Would someone recommend another brand/product I might try? Something a little more powerful?

Danny
s/v Feral, Marieholm 26
__________________
Danny
s/v Feral, Marieholm 26
dannyjoh is offline   Reply With Quote
Old 23-05-2015, 11:28   #23
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,334
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

Quote:
Originally Posted by dannyjoh View Post
My boat (26 feet fiber glass sailboat built in 1977) came with a brand new Hawkeye D10 in-hull depth sounder kit still in the package. I followed the instruction looking for a suitable spot all over the boat (including the bilge). No luck. The system works great when when I drop the transducer overboard. So there is nothing wrong with the functionality of the unit. This particular brand appears to be not strong enough for shooting and receiving signal through the hull of my boat. I am giving up on this one. Would someone recommend another brand/product I might try? Something a little more powerful?

Danny
s/v Feral, Marieholm 26
I don't know that unit. Probably if you get one that is advertised as reading to deep depths would help. I've done it with fairly cheap fish finder types. The ones that scroll the bottom shape. They are advertised for fishing but some are very reasonable priced and read to 600 feet or more! And they have a digital depth readout as well as the bottom contour function.
Is it possible your boat has a cored hull?
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 23-05-2015, 17:19   #24
Registered User

Join Date: Nov 2011
Location: San Rafael, California
Boat: Marieholm 26
Posts: 18
Images: 1
Send a message via Skype™ to dannyjoh
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

Cheechako,
Thank you for the feedback. As far as I understand, the Marieholm 26 doesn't have any core material in the hull or deck. It is supposed to be solid GRP. A marina neighbor suggested a Garmin in-hull transducer. I will look into it. Thanks again.
__________________
Danny
s/v Feral, Marieholm 26
dannyjoh is offline   Reply With Quote
Old 24-05-2015, 14:28   #25
Registered User

Join Date: Apr 2015
Posts: 21
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

Quote:
Originally Posted by David M View Post
Any sort of material which can efficiently transmit sound will work. Generally speaking, the harder the material, the less will be the attenuation of sound. A hard bedding compound will transmit sound better than silicon sealant. The downside will be that if you ever need to remove the transducer that it might be more difficult with a harder bedding compound.

To give you guys a tad bit more info just in case you decide to try another compound....or multiple compounds that are harder directly underneath the transducer with wax surrounding it...

Water travels at 189 m/s
Steel travels at 57 m/s
Dolomite travels at down to ~30 m/s

All this is at 100% solid bond with no micro annulus(air pockets or gaps) which would cause a false reading. The most important thing is to stay away from attenuation of the signal.

Dow Corning makes some of the best silicone, but it's pricey !!
__________________
Islandnut is offline   Reply With Quote
Old 24-05-2015, 16:37   #26
Wayfaring Mariner
 
captain58sailin's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Homer, AK is my home port
Boat: Skookum 53'
Posts: 4,045
Images: 5
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

Since it seems that a more rigid bedding compound would work better than a softer one, how about using "Splash zone" for the bedding? it is water proof and hardens well and you can break it if you need to remove or replace the transducer? Just a thought, I am in the process of putting in a new depth finder and was thinking about mounting the transducer without putting a new hole in the boat.
__________________
" Wisdom; is your reward for surviving your mistakes"
captain58sailin is offline   Reply With Quote
Old 25-05-2015, 19:01   #27
Registered User
 
sanibel sailor's Avatar

Join Date: Feb 2013
Location: Sanibel FL
Boat: 1979 Bristol 35.5 CB
Posts: 977
re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

It is not hardness (water is pretty soft), but incompressibility is what is important for sound transmission.
__________________
John Churchill Sanibel FL
NURDLE, 1979 Bristol 35.5 CB
sanibel sailor is offline   Reply With Quote
Old 25-05-2015, 23:14   #28
Wayfaring Mariner
 
captain58sailin's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Homer, AK is my home port
Boat: Skookum 53'
Posts: 4,045
Images: 5
Re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

Have you ever done a belly flop in a pool? Felt pretty hard to me.
__________________
" Wisdom; is your reward for surviving your mistakes"
captain58sailin is offline   Reply With Quote
Old 26-05-2015, 07:17   #29
Registered User
 
Island Time O25's Avatar

Join Date: Sep 2014
Posts: 2,017
Re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

I did that on my first boat. I was given an older but never used Eagle (Lowrance) fishfinder with a transom transducer. Googled the procedure and installed it with epoxy over the solid (not cored) f/g portion of the bottom. Worked like a charm even though the f/g at that point was almost 2" thick. The key to good installation is the lack of air bubbles in the epoxy, or whatever you may end up using as a bedding compound.
__________________
Island Time O25 is online now   Reply With Quote
Old 27-05-2015, 02:44   #30
Registered User

Join Date: Oct 2012
Posts: 69
Re: Transom Mount Transducer mounted inside the hull in a bed of 'jelly'

thank you all for input and advice!
stephen
xanadu
westsail 32 sailing south soon for ensanada...
__________________

__________________
elskede is offline   Reply With Quote
Reply

Tags
bed, hull

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bonding Sonar Transducer to inside of hull Peters Wet Marine Electronics 25 15-04-2015 20:21
How to mount depth transducer on steel hull Orchidius Marine Electronics 9 30-12-2014 22:20
Grease Mount Transducer to Inside of Hull sdowney717 Marine Electronics 14 12-08-2011 15:07
For Sale: Garmin Transom Mount Depth and Temperature Transducer Undine Classifieds Archive 0 02-07-2011 16:09
transom mounted tranducer Charlie Marine Electronics 12 17-12-2006 20:53



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:50.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.