Not a new subject - but it doesn't hurt to bring up again, and again. In my case the float sank on the PA20. Showed up when the engine flooded after I reduced power for landing. Didn't know it until I needed a bit of power. Ever see a procedure in The Book that suggests pulling the mixture to get the engine to go?
An AD note came out within a short time saying to replace those nasty tin floats with magic plastic floats. A year or 2 or so later they came out with another AD note to replace those nasty plastic floats with metal floats because they absorbed gas and would sink. Y'all be careful now. That all happened prior to 1962.