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FCV585 -"Bottom Machine"?

Old 02-12-2012, 03:42 PM
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Default FCV585 -"Bottom Machine"?

Anyone know why the Furuno 585 is always mentioned here on THT as a bottom machine? Is it only a bottom machine or can it be used for reading all of the water column?
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Old 02-12-2012, 03:49 PM
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Good point......the FCV585 is superb from 3' down to 3000' depending upon the transducer.

I have FCV585 customers who never fish deeper than 100' and love the unit.





Last edited by semperfifishing; 05-04-2012 at 08:11 PM.
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Old 02-12-2012, 04:00 PM
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Thanks Gil, any answer as to why this unit is often referred to as a great bottom machine?
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Old 02-12-2012, 04:30 PM
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People are always noting what a great unit this is when used with a 1 kw transducer for deep bottom fishing .
And the original primary use for this unit has been just that..deep water fishing etc. so that is what most people consider..

But this is great for any depth..

Beside salt water use...I sell a huge number of these units to almost every state that has a lake....people love the screen size and easy use...and of course that it is a great sonar.


Below is a unit I sold for a boat that only fishes the Ca Delta...20 to 50' depths.


Last edited by semperfifishing; 02-12-2012 at 04:52 PM.
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Old 02-12-2012, 05:41 PM
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Originally Posted by fitzstowe View Post
Thanks Gil, any answer as to why this unit is often referred to as a great bottom machine?
The only part of "great bottom machine" that matters is "great". Its a sounder, a fish-finder, and is one of the best. People call them all kinds of things, so grab one and fish shallow, deep, you name it. And you can call it whatever you want.
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Old 02-12-2012, 05:50 PM
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Default Furuno 585

Just as a point of reference, I had the 585 in a boat I sold last summer and it is an awesome unit. In my new boat, didn't have room for the 585 and put the Furuno 620 in it. It is the smaller brother to the 585 and is also a very high quality sounder. Cant go wrong with either unit.
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Old 02-12-2012, 06:32 PM
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Both are great units and have the same exact target detection circuit.
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Old 02-13-2012, 07:01 AM
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I have a 582L and thinking of upgrading. Do I need a new ducer. Not even sure what I have now. And can I swap them without changing wiring? How much of an upgrade is the 585?
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Old 02-13-2012, 10:00 AM
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Originally Posted by downtown View Post
I have a 582L and thinking of upgrading. Do I need a new ducer. Not even sure what I have now. And can I swap them without changing wiring? How much of an upgrade is the 585?
You have a 10 pin connector..so you are good to go.

(With the Furuno only the CRT units were 8 pin.)

If you are not sure about anything feel free to call ro PM me.
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Old 03-25-2012, 05:26 AM
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I am purchasing a furuno 585 need the best thru hull ducer for my 35 Donzi.I currently have transom mount and loses signal as soon as on plane i was told because of the steps in hull any ideas on placement in hull for ducer
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Old 03-25-2012, 09:12 AM
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Think the B260 (furuno version) is the way to go. I've been researching the 585 myself.

Check out post #10
http://www.thehulltruth.com/marine-e...machine.html#b


I might just wait for the 587 to come out later this year before I buy the 585....
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Old 03-25-2012, 09:24 AM
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is the b164 20 degree, the correct 1kw transducer for the 585?
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Old 03-25-2012, 02:08 PM
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Transducer selection really depends upon your fishing conditions.

For the FCV585..being a 600/ 1000 watt unit.

The B164 is a three element, flush mount tilted element.
Cone angle of 22 x 20 degrees at 50 kHz and 6 x 6 degrees at 200 kHz
Good for shallow to medium depth.
The flush mount is good for trailered boats.
they normally sell for about $650.

The Tm258 is a transom mount , 4 element and is 19 times more sensitive than the B164.
A cone angle of 15 x 21 degrees and 3 x 5 degrees.
It normally sells for about $ 535.

The Tm260 or M260 are 8 element units and are 44 times more sensitive than a B164.
they have a cone of 19 and 6 degrees.
the normally sell for $645. to $725. depending upon configuration.


Each transducer has its merits for fishing form shallow to deep waters.
But you will notice a higher price does not always mean a better quality or more sensitive transducer.
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Old 03-25-2012, 02:22 PM
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Originally Posted by semperfifishing View Post
Transducer selection really depends upon your fishing conditions.

For the FCV585..being a 600/ 1000 watt unit.

The B164 is a three element, flush mount tilted element.
Cone angle of 22 x 20 degrees at 50 kHz and 6 x 6 degrees at 200 kHz
Good for shallow to medium depth.
The flush mount is good for trailered boats.
they normally sell for about $650.

The Tm258 is a transom mount , 4 element and is 19 times more sensitive than the B164.
A cone angle of 15 x 21 degrees and 3 x 5 degrees.
It normally sells for about $ 535.

The Tm260 or M260 are 8 element units and are 44 times more sensitive than a B164.
they have a cone of 19 and 6 degrees.
the normally sell for $645. to $725. depending upon configuration.


Each transducer has its merits for fishing form shallow to deep waters.
But you will notice a higher price does not always mean a better quality or more sensitive transducer.
thanks for the information. i usually fish in less than 500' feet, but plan on deep dropping and swordfish fishing within the next 6 months. what would you suggest? thanks for all of your help on this and many other threads.
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Old 03-25-2012, 03:02 PM
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any of the 260 series for your fishing,

The B260 on larger boats...30' plus.
You can also pocket mount a B260 element.
TheTm 260 or the m260.

PM or call me and I can get more detailed information...mounting, options etc.
The 260 is my customers favorite unit for water greater than 150'.
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Old 03-26-2012, 07:20 AM
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i have a 31 contender. i have a thru hull laid within the glass of the hull that failed some time ago. instead of replacing it, i kept it there and installed a 600w titled element. this is the one that I would like to replace with a 1kw transducer, that's why i assumed that it would be the b164, also a titled element. i dont want a transom mounted transducer. thanks for your help. i appreciate it.
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Old 03-26-2012, 07:50 AM
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Back to the bottom machine question. Maybe they just call them that also.

My Pops always referred to a sonar or fishfinder as a bottom machine. It seems to me growing up, all his old timer friends called them Bottom machines also.

Maybe just vernacular, that's all.
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Old 03-26-2012, 08:45 AM
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Originally Posted by bayrunner16 View Post
Maybe just vernacular, that's all.
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