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replacing fuel sender

Submitted by Percula on Fri, 2016-02-19 19:07

Hi Guys

 

My fuel gauge is showing full all the time (yamaha gauges).

Putting a mulit meter on the wires near the gauge, as well as close as possible to the fuel tank, shows a reading of 30 ohms. (google tells me 30 is full, 240 is empty). The tank is half full so I assume is should be reading about 100 ohms.

So it sounds like my fuel sender unit is faulty?

 

So i need to pull up the floor to replace the sender unit. Is this an easy job? Is it safe? Just worried playing with a fuel tank which is half full!

 

Advice appreciated. If it ends up in the shop thats probably ok though.

Thanks

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Niko

Niko's picture

Posts: 213

Date Joined: 26/11/13

sounds like ur on the right

Fri, 2016-02-19 21:22

sounds like ur on the right track, helpfull u have the specs aswell to confirm. we normally disconnect and bridge the wires (connect a wire between the 2) gives a direct connection, less than 1 ohm will set your guage to full. disconnected ur guage would be open and go to empty. if your sender is disconnected and guage stays at full the fault is in the guage, if the guage moves from full to empty as specified its in the sender (or wires depending on where you test from). as for replacement im not a boat mechanic but i cant imagine its too difficult to remove from the tank, few small bolts/screws holding it into the top of the tank with an o-ring or gasket.

hope that helps

Percula

Percula's picture

Posts: 273

Date Joined: 23/09/08

Thanks

Sat, 2016-02-20 16:58

 Thanks mate