Re: Stus-List Removal of Datamarine depth transponder

[Sailnomad via CnC-List]

FWIW When my trancducer died, I bought a in-hull transducer and have been
very happy with its operation. Of course that is very boat specific and
depends how well of an access you have.
Ahmet
S/V Waterdancer 43 Irwin MKII I
S/V Tabasco C 25
Winthrop, MA, USA
On Nov 25, 2015 8:20 AM, "Bill Bina via CnC-List" 
wrote:

> Just removed mine a few weeks ago. Actually I removed both my speed and my
> depth transducers. The speed transducer was bedded with some normal type of
> bedded and I had little trouble popping it out with some vigorous pounding
> with a 3 pound plastic deadblow hammer.
>
> The depth transducer was apparently bedded with 3M 5200 and nothing would
> budge it even slightly. It was essentially welded in placed.
>
> I finally gave up and used a 2 inch hole saw from outside and cut it out.
> The hole saw bottomed out before it was free, so I had to stop and hack out
> some of the transducer with a hammer and wood chisel before finishing up
> with the holesaw, which also left me with the 2 inch hole needed for the
> new transducer.
>
> Needless to say, I bedded the new transducers with Lifeseal.
>
> If your transducer is bedded with 5200, you will not be removing anything
> suitable for repair. Defender can sell you a replacement for around $100 or
> so. I went with a retractable model so I can pull it mid season for
> cleaning.
>
> Bill Bina
>
> On 11/25/2015 7:56 AM, Indigo via CnC-List wrote:
>
>> More on removal.
>> So I looked more closely at the transponder and found that it appeared to
>> be held in place with a threaded "collar" - this came off easily. However
>> the transponder itself won't budge.  I tried to tap the top of the
>> transponder with a mallet, being careful not to damage the wire, but there
>> was no noticible movement. There is a piece of plywood bonded to the inside
>> of the hull which gives allows the collar to be screwed tight. The hole
>> through the plywood is tight against the transponder, but I don't think
>> tight enough to hold it in place against mallet taps.
>>
>> Am I missing some other retainer - or it the through hull  itself
>> threaded?
>>
>>
>> --
>> Jonathan
>> Indigo C 35III
>> SOUTHPORT CT
>>
>> On Nov 9, 2015, at 06:32, Indigo  wrote:
>>>
>>> I need to remove my Datamarine transponder to send it to DMI for
>>> repair.  Does anyone know how it is held in place in the through hull. I
>>> can't see any retaining pins etc - yet it has a "t" like handle which
>>> implies it should be removable with ease.
>>>
>>> --
>>> Jonathan
>>> Indigo C 35III
>>> SOUTHPORT CT
>>>
>>
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>>
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Re: Stus-List Removal of Datamarine depth transponder

[Patrick Davin via CnC-List]

I removed my Datamarine speed transducer last spring. I spent probably 3
hours trying every non-destructive method I could think of before I had to
move to destructive methods.  Should have done so earlier since I didn't
need to save it anyway (was replacing with an Airmar / Raymarine triducer).

Note - I'm assuming you actually have removed the transponder, and the
*thru-hull sleeve* is what you're trying to remove. The transponder
(transducer) should be relatively easy to remove from the thru-hull sleeve
with some wiggling or heating.

My thruhull looked like it was bedded with something more pliable/spongy
than 5200, but mallets, heat, levers, and pulling were not enough to budge
it. I also had the plywood backing plate glued to the hull. It was not
threaded / tapped.

I discovered the easy way is to cut the thruhull in half, lengthwise along
the inner circumference, with a hacksaw blade. I just used the blade alone
clamped in some vice grips. By cutting the plastic thruhull in half you
weaken the outward pressure of the circle and enable basically peeling each
half away from the hull. Be careful not to cut too deep or you'll nick the
hull fiberglass.

I have pictures if you need them.

@ Steve Thomas: The Datamarine speed transducer in my experience was
exactly the same diameter as the Airmar transducers. Are you saying the
depth trans is smaller than the speed? That would be surprising, but I
suppose it's possible.

-Patrick
C LF38
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Re: Stus-List Removal of Datamarine depth transponder

[S Thomas via CnC-List]

Patrick, 
Come to think of it, you are correct. I had to cut a bigger hole 
for the Airmar speed transducer, and not the depth transducer, as I previously 
and erroneously stated. 
My bad. 

Steve Thomas
C MKIII
C MKI
  - Original Message - 
  From: Patrick Davin via CnC-List 
  To: cnc-list@cnc-list.com 
  Cc: Patrick Davin 
  Sent: Wednesday, November 25, 2015 10:19
  Subject: Re: Stus-List Removal of Datamarine depth transponder


  


  @ Steve Thomas: The Datamarine speed transducer in my experience was exactly 
the same diameter as the Airmar transducers. Are you saying the depth trans is 
smaller than the speed? That would be surprising, but I suppose it's possible.


  -Patrick
  C LF38






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Re: Stus-List Removal of Datamarine depth transponder

[S Thomas via CnC-List]

The more I think about it, the less certain I am which was which now. 
It was a long time ago, but I know that I had to use a hole saw for at least 
one of them in replacing Datamarine with Raytheon. 

Steve. 
  - Original Message - 
  From: S Thomas via CnC-List 
  To: cnc-list@cnc-list.com 
  Cc: S Thomas 
  Sent: Wednesday, November 25, 2015 11:12
  Subject: Re: Stus-List Removal of Datamarine depth transponder


  Patrick, 
  Come to think of it, you are correct. I had to cut a bigger hole 
for the Airmar speed transducer, and not the depth transducer, as I previously 
and erroneously stated. 
  My bad. 

  Steve Thomas
  C MKIII
  C MKI
- Original Message - 
From: Patrick Davin via CnC-List 
To: cnc-list@cnc-list.com 
Cc: Patrick Davin 
Sent: Wednesday, November 25, 2015 10:19
Subject: Re: Stus-List Removal of Datamarine depth transponder





@ Steve Thomas: The Datamarine speed transducer in my experience was 
exactly the same diameter as the Airmar transducers. Are you saying the depth 
trans is smaller than the speed? That would be surprising, but I suppose it's 
possible.


-Patrick
C LF38









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Re: Stus-List Removal of Datamarine depth transponder

[Indigo via CnC-List]

I have not been able to remove the transducer itself.  I am hoping to remove it 
and send it to DMI for repair / replacement. I was beginning to think that the 
transducer might have an integral flange instead of a thru hull but your post 
tells me otherwise - assuming we are talking about the same unit. 

--
Jonathan
Indigo C 35III
SOUTHPORT CT

> On Nov 25, 2015, at 10:19, Patrick Davin via CnC-List  
> wrote:
> 
> I removed my Datamarine speed transducer last spring. I spent probably 3 
> hours trying every non-destructive method I could think of before I had to 
> move to destructive methods.  Should have done so earlier since I didn't need 
> to save it anyway (was replacing with an Airmar / Raymarine triducer). 
> 
> Note - I'm assuming you actually have removed the transponder, and the 
> *thru-hull sleeve* is what you're trying to remove. The transponder 
> (transducer) should be relatively easy to remove from the thru-hull sleeve 
> with some wiggling or heating. 
> 
> My thruhull looked like it was bedded with something more pliable/spongy than 
> 5200, but mallets, heat, levers, and pulling were not enough to budge it. I 
> also had the plywood backing plate glued to the hull. It was not threaded / 
> tapped.
> 
> I discovered the easy way is to cut the thruhull in half, lengthwise along 
> the inner circumference, with a hacksaw blade. I just used the blade alone 
> clamped in some vice grips. By cutting the plastic thruhull in half you 
> weaken the outward pressure of the circle and enable basically peeling each 
> half away from the hull. Be careful not to cut too deep or you'll nick the 
> hull fiberglass. 
> 
> I have pictures if you need them. 
> 
> @ Steve Thomas: The Datamarine speed transducer in my experience was exactly 
> the same diameter as the Airmar transducers. Are you saying the depth trans 
> is smaller than the speed? That would be surprising, but I suppose it's 
> possible.
> 
> -Patrick
> C LF38
> 
> 
> ___
> 
> Email address:
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> To change your list preferences, including unsubscribing -- go to the bottom 
> of page at:
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Re: Stus-List Removal of Datamarine depth transponder

[Indigo via CnC-List]

More on removal. 
So I looked more closely at the transponder and found that it appeared to be 
held in place with a threaded "collar" - this came off easily. However the 
transponder itself won't budge.  I tried to tap the top of the transponder with 
a mallet, being careful not to damage the wire, but there was no noticible 
movement. There is a piece of plywood bonded to the inside of the hull which 
gives allows the collar to be screwed tight. The hole through the plywood is 
tight against the transponder, but I don't think tight enough to hold it in 
place against mallet taps. 

Am I missing some other retainer - or it the through hull  itself threaded?


--
Jonathan
Indigo C 35III
SOUTHPORT CT

> On Nov 9, 2015, at 06:32, Indigo  wrote:
> 
> I need to remove my Datamarine transponder to send it to DMI for repair.  
> Does anyone know how it is held in place in the through hull. I can't see any 
> retaining pins etc - yet it has a "t" like handle which implies it should be 
> removable with ease. 
> 
> --
> Jonathan
> Indigo C 35III
> SOUTHPORT CT

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Re: Stus-List Removal of Datamarine depth transponder

[Bill Bina via CnC-List]

Just removed mine a few weeks ago. Actually I removed both my speed and 
my depth transducers. The speed transducer was bedded with some normal 
type of bedded and I had little trouble popping it out with some 
vigorous pounding with a 3 pound plastic deadblow hammer.


The depth transducer was apparently bedded with 3M 5200 and nothing 
would budge it even slightly. It was essentially welded in placed.


I finally gave up and used a 2 inch hole saw from outside and cut it 
out. The hole saw bottomed out before it was free, so I had to stop and 
hack out some of the transducer with a hammer and wood chisel before 
finishing up with the holesaw, which also left me with the 2 inch hole 
needed for the new transducer.


Needless to say, I bedded the new transducers with Lifeseal.

If your transducer is bedded with 5200, you will not be removing 
anything suitable for repair. Defender can sell you a replacement for 
around $100 or so. I went with a retractable model so I can pull it mid 
season for cleaning.


Bill Bina

On 11/25/2015 7:56 AM, Indigo via CnC-List wrote:

More on removal.
So I looked more closely at the transponder and found that it appeared to be held in 
place with a threaded "collar" - this came off easily. However the transponder 
itself won't budge.  I tried to tap the top of the transponder with a mallet, being 
careful not to damage the wire, but there was no noticible movement. There is a piece of 
plywood bonded to the inside of the hull which gives allows the collar to be screwed 
tight. The hole through the plywood is tight against the transponder, but I don't think 
tight enough to hold it in place against mallet taps.

Am I missing some other retainer - or it the through hull  itself threaded?


--
Jonathan
Indigo C 35III
SOUTHPORT CT


On Nov 9, 2015, at 06:32, Indigo  wrote:

I need to remove my Datamarine transponder to send it to DMI for repair.  Does anyone 
know how it is held in place in the through hull. I can't see any retaining pins etc - 
yet it has a "t" like handle which implies it should be removable with ease.

--
Jonathan
Indigo C 35III
SOUTHPORT CT


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Re: Stus-List Removal of Datamarine depth transponder

[S Thomas via CnC-List]

The good thing about removing a stuck Datamarine depth transducer is that it 
is a smaller diameter than the transducers used with Raymarine and other 
manufacturers. If you are careful and lucky, no repair to the hull will be 
necessary.


Steve Thomas
C MKIII
Port Stanley, ON
C MKI
Merritt Island, FL

- Original Message - 
From: "Bill Bina via CnC-List" <cnc-list@cnc-list.com>

To: <cnc-list@cnc-list.com>
Cc: "Bill Bina" <billbinal...@gmail.com>
Sent: Wednesday, November 25, 2015 08:18
Subject: Re: Stus-List Removal of Datamarine depth transponder


Just removed mine a few weeks ago. Actually I removed both my speed and my 
depth transducers. The speed transducer was bedded with some normal type 
of bedded and I had little trouble popping it out with some vigorous 
pounding with a 3 pound plastic deadblow hammer.


The depth transducer was apparently bedded with 3M 5200 and nothing would 
budge it even slightly. It was essentially welded in placed.


I finally gave up and used a 2 inch hole saw from outside and cut it out. 
The hole saw bottomed out before it was free, so I had to stop and hack 
out some of the transducer with a hammer and wood chisel before finishing 
up with the holesaw, which also left me with the 2 inch hole needed for 
the new transducer.


Needless to say, I bedded the new transducers with Lifeseal.

If your transducer is bedded with 5200, you will not be removing anything 
suitable for repair. Defender can sell you a replacement for around $100 
or so. I went with a retractable model so I can pull it mid season for 
cleaning.


Bill Bina

On 11/25/2015 7:56 AM, Indigo via CnC-List wrote:

More on removal.
So I looked more closely at the transponder and found that it appeared to 
be held in place with a threaded "collar" - this came off easily. However 
the transponder itself won't budge.  I tried to tap the top of the 
transponder with a mallet, being careful not to damage the wire, but 
there was no noticible movement. There is a piece of plywood bonded to 
the inside of the hull which gives allows the collar to be screwed tight. 
The hole through the plywood is tight against the transponder, but I 
don't think tight enough to hold it in place against mallet taps.


Am I missing some other retainer - or it the through hull  itself 
threaded?



--
Jonathan
Indigo C 35III
SOUTHPORT CT


On Nov 9, 2015, at 06:32, Indigo <ind...@thethomsons.us> wrote:

I need to remove my Datamarine transponder to send it to DMI for repair. 
Does anyone know how it is held in place in the through hull. I can't 
see any retaining pins etc - yet it has a "t" like handle which implies 
it should be removable with ease.


--
Jonathan
Indigo C 35III
SOUTHPORT CT


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Re: Stus-List Removal of Datamarine depth transponder

[Ahmet via CnC-List]

The transducers I removed were twist and pull type. They usually have to
o-rings on them. You should have a dummy plug to put in there ASAP
(i.e.within seconds) if you are in the water.
They are designed to be removed while in the water, but is is a very
"exciting" process.
On some boats there is a simple flapper valve that closes then you pull out
the transducer, so you don't get a 3 ft geyser coming into the boat.
If you do that in the water, besides the dummy plug, have a plastic bags,
duct tape and wooden plugs within reach, just in case .
I have not done it on Tabasco, I may try it next year so I can use my
speedo. It is one of the things I don't like to do.
I usueally use some light vaseline on the o rings (both the transducer and
the dummy plug) before I put it back in.

I would not attempt it without a dummy plug. Wooden carrots may slow things
down but are just an emergency measure.

Ahmet
S/V Tabasco 1973 C 25
Boston, MA

On Mon, Nov 9, 2015 at 7:04 AM, Josh Muckley via CnC-List <
cnc-list@cnc-list.com> wrote:

> ALL of the datamarine transducers that I've had or seen have a pin and
> ring which secure the transducer.  The T-handle on mine are used to secure
> the transducer thru-hull housing in the hull.  Don't touch until you are
> really sure AND on the hard.
>
> Maybe some pictures would help us see what you're dealing with.
>
> Josh Muckley
> S/V Sea Hawk
> 1989 C 37+
> Solomons, MD
> On Nov 9, 2015 6:33 AM, "Indigo via CnC-List" 
> wrote:
>
>> I need to remove my Datamarine transponder to send it to DMI for repair.
>> Does anyone know how it is held in place in the through hull. I can't see
>> any retaining pins etc - yet it has a "t" like handle which implies it
>> should be removable with ease.
>>
>> --
>> Jonathan
>> Indigo C 35III
>> SOUTHPORT CT
>> ___
>>
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>> bottom of page at:
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>>
>>
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>
>
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Re: Stus-List Removal of Datamarine depth transponder

[Josh Muckley via CnC-List]

ALL of the datamarine transducers that I've had or seen have a pin and ring
which secure the transducer.  The T-handle on mine are used to secure the
transducer thru-hull housing in the hull.  Don't touch until you are really
sure AND on the hard.

Maybe some pictures would help us see what you're dealing with.

Josh Muckley
S/V Sea Hawk
1989 C 37+
Solomons, MD
On Nov 9, 2015 6:33 AM, "Indigo via CnC-List"  wrote:

> I need to remove my Datamarine transponder to send it to DMI for repair.
> Does anyone know how it is held in place in the through hull. I can't see
> any retaining pins etc - yet it has a "t" like handle which implies it
> should be removable with ease.
>
> --
> Jonathan
> Indigo C 35III
> SOUTHPORT CT
> ___
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