Having trouble with carb flooding on a 425. If you turn the key on to just activate the fuel pump but not enough to crank the starter you can literally see gas streaming down into the intake. The carb is the later style that has a Fuel shutoff solenoid. I checked the float position to assure the lower section was parallel with the body mating surface and everything is good there. When I pulled the top off of the carb I took the float assembly off and checked for any sloshing of gas inside and then put it on some paper to check for any seepage but nothing, so I think the float is fine. I also filled the carb body with gas to see if there were any casting leaks but luckily everything looked good. The needle valve shows a slight indent where it normally fits into the brass seat. I plan to replace the needle valve and upper carb gasket and was wondering if the brass seat is replaceable and if so where since Deere does not show as a serviceable item.