Hey guys, thanks for the info, much appreciated

The buyer bought it around, I tested it here.. no problem.. started, ran, shut off fine. No leaks. Buyer took it back, but after using it, sent me a video of it dripping from the area between the carb and #13/14
Mower was switched to 'ON' and not running.. but when switched to 'OFF', leak stops.
Q: Why would the carb continue to suck up fuel if mower isn't running? Does it have some sort of syphon effect like syphoning fuel from a car?
Buyer's bringing it back, so Ill know more once I have it back and on the bench.