Thanks.  I know how to read a multmeter.  Now all I need is for the temperature 
to drop below 100 degrees so I don't die from the heat. 
FrankC&C 29  

    On Friday, July 22, 2016 10:06 PM, Josh Muckley via CnC-List 
<cnc-list@cnc-list.com> wrote:
 

 The fuel level sender is just a variable resistor.  There should be 1 wires 
going to the sender.  The resistance is that felt from the sense  wire to 
ground.  As the level changes the voltage dropped across this resistance 
changes and in turn is registered on the gauge.  The easy way to check the 
sender is to measure the resistance from the sense wire to ground.  Be careful 
not to accidentally measure the resistance of the 12v supply.  I seem to 
remember that the typical moeller float senders are 300 ohm?  So you should see 
between 30 and 300 ohms and most likely at half full something close to 150 
ohms.Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Jul 22, 2016 8:47 PM, "Franklin Schenk via CnC-List" <cnc-list@cnc-list.com> 
wrote:

 Is there a simple way to check out the fuel level sensor to see if it is 
working properly?  The fuel gauge reads zero even though the tank is about half 
full.
Frank
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