Not sure about your float, but the floats I've repaired had a service vent, bitty hole soldered over. Would unsolder/soldersucker that vent hole, place float out in sunlight, vent side down, patiently wait couple days. Hot/cold heat cycles would vent-out fuel from inside. When dry, solder repair area, lastly reseal vent hole. If you don't have one, suppose you could drill .032" service vent in convient area. Having service vent open keeps solder from blowing-out/sucking-in during repair.