I can start it right up, run it for a couple of minutes and it starts cutting out/losing power off and on for another couple of minutes like this, then quits, then gas slowly leaks from behind the air filter until the tank is empty!! My guess is a carburetor issue. (bad float or gasket?) Tried to go into a couple stores around here that stock and sell carburetor kits to see if I can fix it myself by buying some replacement parts but everyone wants an ENGINE model number. As far as I can tell the mower model number is PR173Y22RP but they say that's not it and they need a 6 digit engine model number to sell me the correct replacement parts for the carburetor. I've searched high and low on the mower and can't find an engine model number that they swear is on one of the stickers on the mower. Any help here would be greatly appreciated, I've got a small jungle in my back yard!