Hi Rick,
Your carb float needle is leaking, you need to replace the float needle and seat (an easy fix once the carb is removed from the mower). If you remove the cover plate on the transfer chamber under the mower several ounces of fuel/oil mix will leak out (not actually a must do item, as it will eventually burn off).
FWIW, a Tecumseh primer bulb off a small two cycle snowblower will fit on the plastic shroud found on a 10323.
Regards
Jeff