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Old 14 October 2013, 10:43   #1
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In Hull transducer

Does anybody have any views on this one ? ie an in hull transducer ?

Are they any good .... Is it easy to install as I can only see on "man hole" to get to the hull.... Expoxy bonding i suspect... Views welcome

Garmin Transducer, 200/50Khz, In-Hull Mount - Only 89.95 - Force 4 Chandlery
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Old 14 October 2013, 11:53   #2
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It's plenty capable and better than the transom mount transducers that usually come with the head unit.

Also, search for Airmar P79 since that's what it is. I have a generic P79 with a pigtail that converts it to Lowrance. If you get the generic, it would be easier to sell later. They are all amount $125 US (the Lowrance is $15 cheaper for some reason)
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Old 14 October 2013, 12:25   #3
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Had one fitted a Karnic Bluewater a few years back. It was a bit sensitive initially but worked fine once fitted correctly. I had the void between the sensor housing and sensor filled with grease to aid the sonar which, from memory, seemed to do the trick.
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Old 14 October 2013, 12:53   #4
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Originally Posted by Huib1965 View Post
Does anybody have any views on this one ? ie an in hull transducer ?

Are they any good .... Is it easy to install as I can only see on "man hole" to get to the hull.... Expoxy bonding i suspect... Views welcome

Garmin Transducer, 200/50Khz, In-Hull Mount - Only 89.95 - Force 4 Chandlery
go for it, works spot on with a Garmin 4008, just take your time to make sure it's properly secured to the hull, we used olive oil between the mount and transducer and that's worked well for a few years
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Old 14 October 2013, 13:35   #5
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Hey Chris... Thanks... I can only see one entry point to the hull (Stern side) How did you bond it to the GRP and I read indeed you need to fill it with an oil ? Weird ? is there no special oil you need to fill it with ? Also ? Are we saying that the Garmin one is the same as Airmai P79 which i think is more expensive ?
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Old 14 October 2013, 13:52   #6
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Hey Chris... Thanks... I can only see one entry point to the hull (Stern side) How did you bond it to the GRP and I read indeed you need to fill it with an oil ? Weird ? is there no special oil you need to fill it with ? Also ? Are we saying that the Garmin one is the same as Airmai P79 which i think is more expensive ?
when we had decided best location, after lots of measuring and double checking with a spirit level ( yes, a spirit level we jacked trailer up so that deck was level side to side and front to rear ) we cleaned hull and then sanded it back to get a good key on the surface, we then bonded the mount to the hull with silkaflex, which we left overnight to go off rock solid. we were advised to use olive oil in between the transducer and hull so as to provide a permanent path through to the water, it's worked so far for us, but I guess there are other fluids you could use just as good as olive oil
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Old 14 October 2013, 14:20   #7
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Hey Chris, Sounds pretty easy to me then... nice little job to do over the winter I guess..... The Sikaflex was the 921 ? txs
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Old 14 October 2013, 15:02   #8
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Hey Chris, Sounds pretty easy to me then... nice little job to do over the winter I guess..... The Sikaflex was the 921 ? txs
yes, I think it was 921, rings a bell was easy enough to do, but worth getting it right

don't know about the Airmai P79 being same as the garmin version but guess could well be the same thing
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Old 14 October 2013, 15:05   #9
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Hi Huib 1965

Chris Caton is spot on with prep and undertaking. Good clean surface to bond to and a light abrasion. I fitted the same transducer and was more than happy. In terms of fluid I used polypropylene glycol as this was what was recommended. Obviously ensure you bond it to the rib hull that will always be in the water when used. I placed mine off centre near the transom within the deck void once I had worked out and set the angle of the hull and transducer.

Regards

Lewey
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Old 14 October 2013, 15:05   #10
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Airmar make transducers for a lot of the "big boys". Only the connectors are different.
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