One Fuel Sender, Two Gauges.

[Captin_Kirk]

I have a fuel gauge at the helm of my sailboat, and just recently bought a multi display Gauge for water, waste and fuel. It is going to be mounted in the cabin at the nav station. I was wondering if it is possible to use the existing fuel sender for both gauges?

I searched around and did not really find an answer.

[GordMay]

No.
You’ll require a “Dual Station” fuel sender, (resistance) matched to the gauges. Your new multi-display gauge may, or may not match your existing fuel gauge.

[S/V Antares]

The sender in the tank is likely a leaver type resistive sender. As the float moves up and down the resistance changes.

The most common "OHM" range is 240 -33 ohms. (Emty to full) There are other ranges out there. (10-180 or 0-90)

Normally if you wish to use two simple gauges you need a sender set up for dual gauges which means the sender has half the resistance in order to accomodate the resistance in the second gauge. ( like: 120 -15 ohms)

Dual senders will usually have a "D" stamped on them or the part number for a dual unit.

That said, your multifunction gauge, if digital , may be setable for various ranges. The best thing is read the directions. Then try it. If you take out the sender you can move it up and down to test it.

Hope that helps!