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Old 06-04-2008, 08:02 PM
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fuel sender conversion

How can I convert my 73 ohm empty and 10 ohm full sending unit to 240 ohm empty and 33 ohm full? I read an older post about it but I don't know what size pot to use. It was titled gm sending unit conversion 30 ohm and was in the electrical forum. Thank you for any help.

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Old 06-04-2008, 08:26 PM
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The search function on this site works great....here ya go..... click on it...GM Fuel sending unit conversion 30 ohm Its good to know that Doc's knowledge is still helping folks.
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Old 06-04-2008, 09:18 PM
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But what size pot should I use?
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Old 06-04-2008, 09:25 PM
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Click on the link I gave you and read the thread...its all there you just got to read all the posts in it. Here is a statement from one of Doc's posts. .................................................. .........



"I like to replace the resistor with a 50 Ohm potentiometer, mounted on an "L" bracket aluminum piece , in this way, you can "Fine Tune" the readout by setting the pot for the MOST accurate readings!

The pot needs to be a Linear Taper, 50 Ohms, at about 5 Watt, Can be had at rat shak for about $2 Bucks.

Configure it thus: The lower terminal and Center wiper together, with the sender wire attached there, And the upper terminal to the gauge. Use heat shrink on the terminals so nothing can short them out.

When you have it totally adjusted, melt some hot wax or hot glue on the pot shaft so it won't move until you may want to adjust again, and your good to go.

Doc "
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Old 06-04-2008, 09:36 PM
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Were still thinking about you DOC!!!!!!!!!
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Old 06-06-2008, 12:22 PM
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So, if my sender is 73 and 10 ohms and my guage is 240 and 33 ohms, the difference between them is 144 ohms, right? Then I would need a 150 ohm pot, right?
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