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If no indicator, then no sensor?

Discussion in 'Bennett Trim Tabs Vendor Forum' started by Atalla, Nov 16, 2020.

  1. Atalla

    Atalla Member PLATINUM Sponsor

    74
    Sep 1, 2020
    2007 Sundancer 38
    Twin Merc 8.1 S Horizon V-Drives
    Is it generally the case that if my trim tab controller has no LED indicator of position then the sensor is not installed to relay tab position to the helm? My 2007 DA has just the switch controls. I have read the threads about the kit that can be installed to either relay to a new dash controller with indicator or hook it into NMEA for the VesselView indicator.

    I'm not clear if the sensors that relay tab position were something that just starting coming standard on the trim tabs at a certain point/year such that they might be on my boat and I just need to install a new controller/indicator.

    Thanks.
     
  2. bobeast

    bobeast Dance the Tide SILVER Sponsor

    Oct 22, 2017
    Isleton, CA
    2002 310DA
    350 MPI w/V-drives
    It's a good bet that your tab cylinders do not contain the position sensors. I can't imagine a manufacturer failing to cut that corner if there was no plan to connect it to something.

    I had to add the sensors to mine when I installed a dash control with position readout.
     
  3. Atalla

    Atalla Member PLATINUM Sponsor

    74
    Sep 1, 2020
    2007 Sundancer 38
    Twin Merc 8.1 S Horizon V-Drives
    I generally assume this to be true, but I wasn't clear if position sensors became a feature of the Bennett tabs at some point or if they have always been and perhaps continue to be an add on element.
     
  4. Henry Boyd

    Henry Boyd Well-Known Member GOLD Sponsor

    Apr 24, 2007
    Newburyport, on the peaceful and serene Merrimack
    ‘09 Sabre 38 Hardtop Express “Serenity”
    Volvo D6 w/IPS450 Pods
    It’s easy enough to check. On the inside of the transom there will be plastic hydraulic lines going to the trim cylinders. If the sensor modules are mounted there will also be a two wire cable coming coming through the transom in roughly the same spot.
     
    Atalla likes this.
  5. bobeast

    bobeast Dance the Tide SILVER Sponsor

    Oct 22, 2017
    Isleton, CA
    2002 310DA
    350 MPI w/V-drives
    Bennet still sells cylinders with or without the sensors. In addition, you can retrofit a non-sensing cylinder by adding the sensor assembly (new upper hinge + sensing rod)
     
    Atalla likes this.

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