Question about Navman F4100SX Fishfinder - W/ Transom Mount Transducer (DUCER-2712R) GPS Receiver

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Navman 4500 fish finder w/transom mount transducer

My almost new fish finder cannot find the transducer and goes in to simulate mode. I purchased a new transducer only to find out that the transducer was apparently not the problem. Does anyone have a similar problem with the navman and, if so, is there a fix or solution? LB

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  • corcon1 Apr 22, 2009

    navman 4500 goes to sim ulate mode wont register transducer

  • walteranddeb Apr 29, 2009

    I have exactly the same problem. I have tried to call Navman customer service several times. I usually get only a recording. Once, I spoke to someone who barely spoke English and I am sure they were in a foreign country. They gave me Navman's customer service number which is a non working number. This was a very expensive system and I too would appreciate any help.

  • gwynnepeter Apr 25, 2010

    hi do you have a spare transducer for your navman, it think mine has a fault, please contact 0400126231

  • Henry Hollis Jan 07, 2013

    I too have exactly the same problem with my Navman Fish450. I would also appreciate any help

  • Henry Hollis Jan 07, 2013

    I'm having the same problem with my NVMAN Fish450. I would also appreciate any help

  • Anonymous Mar 24, 2014

    I have the display unit but im missing the power cable. it has about 8 pins in a round connector but i dont know where to feed the +- 12v can anyone measure the location of the power coming into the unit. in the manual it tells me red positive and black and yellow together negative. thats if you have the original navimo cable


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I finally got an email reply from Navman. If the unit is less than two years old (mine is not) they will repair it. If it is over two years old, or if you can't prove that it is less than two years old, you can ship it to them and they will repair it for the low, low price of 355 US dollars.

Pretty nice of them since it appears these units are highly problematic isn't it? I am wondering if they guarantee their fix, or just have you on the hook for another 355 dollars later.

Good Luck Everyone,


Posted on Apr 30, 2009

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