Dripping 850 Carb

Most folks make a habit of turning off the gas when their tractor is not in use. Since it's a gravity feed system, any leak, no matter how small, will eventually empty the tank.

Now that that is out of the way... If you have gas getting into the carb vent/drain.. that means it is getting past the float needle/seat. That is either due to a heavy float.. a float with a hole in it.. a float that hangs.. or a bit of trash in the needle/seat area / bad or not sealing needle / seat.. etc..

Rap on the side of the carb with a screwdriver handle a fey times next time you use it and see if the drip goes away.. if not.. pull it apart again and pay very close attention tot he needle / seat issue.. It's the gas valve that stops the gas when the carb bowl is full, and opens to let gas in when the bowl is low.. float height isn't as picky as some believe.. a tad off and you will not be in a flood situation.. etc..etc..

Soundguy

To you other guys, thanks for the input, but I have played with the float, checked it for leaks, the whole bit. I even fashioned a container to fit around the carb so I could remove the bowl and see how the needle and seat behaved. Even though the needle and seat were contacting, I still had a very slow drip. I removed the carb and put light air pressure to the inlet while holding the seat solidly closed. It seemed to hold air. It may be gettin by the threads on the valve body.

Again, thanks for the input.