If no indicator, then no sensor?

Atalla

Active Member
Sep 1, 2020
244
Seattle
Boat Info
2007 38 Sundancer
Engines
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.
 
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.
 
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.
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.
 
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.
 
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)
 

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