Fuel sender high / low resistance Beneteau Antares 30 fly

[Popski]

I’m trying to sort out my failing fuel sender on my Volvo Penta D6 etc. I can’t remove the sender from the tank as the location is under the cockpit and the tank has around 270litres so I am making up a system to check if the sender is working correctly and I can’t determin if low resistance from the sender = empty and high resistance = full as the measured values across the sender are showing 153 Oms. Once I know for sure I can maybe set the calibration. Sorry to be a pain on this but I’m pulling my hair out by the roots now....

 

[Andyroonot]

It’s most likely European spec. so 3 Ohms empty, 180 Ohms full. So, if you put a piece of wire between the two terminals to give it 0 Ohms, your tank gauge ‘should’ show as empty. You can also carry out the ‘empty tank calibration’ with it like this & then remove the bridging wire, after which if its working ok it all read the correct (ish) level.

 

[oldgit]

Might be different problem but recently repaired one of these, simple soldering job, track had fractured on top of actual sender unit.
Dob of solder restored connectivity to male lucar connector.

 

[jrudge]

I had a similar issue with the water tanks on my boat. You can’t get to the sender

I installed one of these which are Fairline oem now
http://www.hendersons.co.uk/boattank/tank-level-gauge.html

The link is the water version but they do a fuel version as well.

Far more accurate than floats and cheap at circa £100

 

[simonfraser]

my sender is high resistance = full, not the best as a corroded connection will lead you to believe the tank is full
had to take the glued / screwed down floorboards ??! up to get to the sender, made a right mess of the laminate

 

[Popski]

Hi thanks for the info. I can’t now get any calibrations on the guage I just get “values rejected” when I try and add empty / full tank calibration. Does this mean I now need the Volvo engineer....problem here on Gozo there isn’t one.

 

[jrudge]

https://wema.co.uk/pages/faqs
There are 2 specs. USA and Europe. It does not seem to matter where they were made. My English Williams rib uses USA standard

You may have put it out of range by shorting the terminals ( which was good advise but not if the other spec sender !)