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Old 21-03-2019, 06:07   #1
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Question 2" Transducer through-hulls: are they transducer-specific?

I have old Moor depth and water speed transducers in my hull, in 2" through-hulls. It seems most transducers of this sort use 2" through-hulls.

The problem is, I'm upgrading my electronics and want to get depth, water temperature, and water speed available on my new chartplotter. Moor Electronics transducers go directly to gauges, and apparently they no longer make transducers.

My question is, are these through-hulls basically the same thing, just a 2" hole in the bottom of the boat? Can I pull the Moor transducer out and put in a Navico with an expectation that my boat will not fill with water? Or do I need to replace the entire through-hull assembly?
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Old 21-03-2019, 06:28   #2
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Re: 2" Transducer through-hulls: are they transducer-specific?

If you buy a new through hull transducer it will come complete so why not just cut out the old one and glue in the new transducer. That way you know its done properly.

I changed from Stowe to Raymarine which did require a larger 2" hole, so worth checking with which ever Navico brand you intend to fit.
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Old 21-03-2019, 06:30   #3
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Re: 2" Transducer through-hulls: are they transducer-specific?

Not necessarily. Figure out what you want, get the specs, and go measure. Maybe youíll get lucky. I just upgraded old Raymarine to new Raymarine with new DST from same mfr as the previous one and itís a different size thruhull. You may find something that works but itís not a universal fitting.
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Old 21-03-2019, 06:54   #4
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Re: 2" Transducer through-hulls: are they transducer-specific?

Quote:
Originally Posted by Pete7 View Post
...why not just cut out the old one and glue in the new transducer...
...well, it'd be awfully nice if I didn't have to haul out to replace the transducer.
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Old 21-03-2019, 07:05   #5
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Re: 2" Transducer through-hulls: are they transducer-specific?

Ah, tricky especially as you don't have much in the way of tides on the East coast.

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Old 21-03-2019, 09:22   #6
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Re: 2" Transducer through-hulls: are they transducer-specific?

Most transducers were built by Airmar or Radarsonics for various mfgrs.
I don't know who built the ducer for your Moor Electronics model meters.
Here are some links that may help:


Moor Installation Diagrams


http://www.airmar.com/xref.html


http://www.moorelectronics.com/product_manuals.html
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Old 23-03-2019, 08:11   #7
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Re: 2" Transducer through-hulls: are they transducer-specific?

The chance that the existing through hull housing will be suitable for the new transducer is small. So it would be wise to mount directly the new through-hull assembly which comes with your new transducer. If the old one does not fit exactly you will have a nasty leaking problem. Take out the boat out of the water again and mount the new housing with an appropriate drying time etc. etc. Do not try your luck.
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Old 23-03-2019, 09:23   #8
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Re: 2" Transducer through-hulls: are they transducer-specific?

Check out the Airmar P79 transducers. They are a puck style shoot thru hull transducer available for most brands. Super easy to glue to inside of hull with 5200 and fill with antifreeze. If your old transducer is 200khz, which is probably the most common you can alway splice to something compatible. .
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