Re: cork floats

[r-c]

Pappy is correct on that. The black ones last, what seems forever. I believe this material was developed for aircraft. Watch out for heavy varnish, the wieght problem again, but that can be cleaned off.
Sometimes you have to look elsewhere or be creative for a float. We found that the modern Yamato stock outboard race engines has a black float that you can shorten from the bottom on a surface plate with some 320 wet and dry to the length of an Elto poppet valve carb like a Speedster.
Same goes for the black Merc float that fits the Tillotsons fuel pump carb, can be shorten in this same manner to fit a gravity feed carb.