The floats are brass, right? Shine up the brass around the holes you drilled. Use a good-sized soldering gun. Allow the tip to pre-heat, and have a drop of molten solder on the tip, and quickly touch it to the float, and get the hole covered with solder, before the whole float and the air inside it heat up, and the air begins to bubble out through the dab of solder over the drilled hole. Then, hold the float immersed in warm water, and you will see air bubbling out through the original leak. Once the source of the leak is identified, you can melt the dab of solder off of your drilled hole, to make an air vent, and then solder the original leak. You may have to unsolder the halves of the float, and take it apart to clean the seam area, if the leak is at the seam where the halves join. When you get the leak soldered up, allow it to cool to room temperature, then quickly solder the vent hole shut as was done previously. Don't overdo it with the (heavy) solder, or you will have a "sink", rather than a "float"! If you can't repair the float, I have some new ones on hand. Unfortunately, they cost about $15.00, and, if you can really get a whole new sender for $25.00, that sounds like a good deal! bigcoulee@hotmail.com
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