I’m guessing they never tooled up a mold to change that one from cork to plastic, probably because the float in the 439074 kit was only used approximately through the 1960s, where 439071 and 439073 kits use the same float, and that float was used in production up through 2005. Molds cost thousands of $$$, and to tool up for motors not in current production doesn’t make economic sense.
I’m not sure what float is in the 396701 kit.
I like that they designed some newer carbs to accept the same floats as some older motors, so we can retrofit. The same float on my 1991 15 HP fits my 1958 18 HP, even though the carbs and kits are much different (439071 and 439073).
Dave
