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Old 18 May 2004, 10:07   #11
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Boat name: Windchill 2
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I had problems with the standard "boat" shaped transduce which came with my Garmin 185 map/sounder when it was hung off the transom on a standad bracket. At anything over about 5 knots, it was reading through aerated, "dirty" water giving very variable, inaccurate readings. It was also very vulnerable to damage when launching/recovering "dry" ie onto/off the sand when the tide is out.

Having read other threads, I opted to move the transducer inboard into the sump, bedded in silicone as opposed to sikaflex which will NEVER let go! It is essential to make sure the bed is free of air bubbles, and that the unit looks straight down through a dense part of the hull.

It worked well for me.
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Old 19 May 2004, 16:32   #12
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Garmin dual frequency transducer bedded in to sump using polyurethane sealant - comes off with a bit of heat unlike sikaflex
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Old 19 May 2004, 17:03   #13
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Due to lack of space within my sump area, and the angle that the hull comes into it at, I don't think I will ever be able to mount my transducer inside the boat

However, reading up, it's not a Garmin part that's at fault here I don't think, it's just a bit unfortunate that they use airmar - my ff is a 160 blue, with an airmar p66 I think. It's a massive lump, but when I owned my last 160 blue, the transducer was much smaller, and far more reliable. Looking through the airmar website, I think this is the one :-
http://www.airmar.com/pdfs/cat/marin..._mount/P52.pdf
It looks like the one I used to own, which worked perfectly on the transom at all speeds, and never popped up when hitting waves or bouncing around..... does anyone else have one of these, and more to the point, is there a recommended dealer that sells these things directly?

Thanks,

-Alex
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Old 19 May 2004, 18:04   #14
DJL
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Alex,

I too had the P52 initially; sadly its bracket got broken and was replaced by a P66. I'm now on my second P66 after the first flipped up and jumped off its bracket and sank to the bottom of the Solent. My current P66 performs very well, although I have lowered it about 10mm below the hull. It did flip up occasionally but I now tie it down with cable ties.

I tried contacting Airmar on several occasions but never got a response. Greenham Regis Marine Electronics seem to be able to order most parts, although you really need to know the exact part number your after.


Link for Mercury owners: Brunswick and Airmar announce SmartCraft sensor deal
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Old 22 May 2004, 17:32   #15
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Thanks for that Daniel - looks like I need to replace my P66 with something a little stronger. I wondered why I kept having to pop the transducer down today, and on return to the dock at the slip, I found out that the clip that holds it down has snapped off completely

It would seem that the sounder thinks that waves being hit at 35knots is beach like, not the best in the world........

Will keep you informed as to how I get on,

-Alex
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