General carburator question

Hey guys --
The sweetie's learner bike is a 150 scooter based on the GY6 with a Keihin style CV carb.

pics here
http://www.scooterfocus.com/scooter_car ... tment.html

The second pic shows a vent pipe pointing down, just to the left of the automatic choke. This is where fuel is pouring out.

A: the vacuum petcock works
B: good strong spark
C: if I drain the carb and disco the petcock, I can eventually get the engine to run. It staggers and smokes, then runs clean until dry.
D: if I reconnect the fuel it pours out the vent and the engine stalls.

Q: is this a stuck float valve?

Thanks!

 

Sounds like you have already proved that.
Tap ... LIGHTLY <--- on the Fuel Bowl with the Butt-end of a Hammer or the Plastic Handle of a Screwdriver.

 

Rick U are awesome!

 

It only took a coupla hours to strip the plastics, pull the carb, pop the bowl, and get it all back together again. Very sweet.

The float valve core piece was a silver metal, whereas the body was brass. The core had some corrosion -- black pitting, as well as a white crystalline build-up. It was the latter causing it to get stuck, and it cleaned up with a nail board. I am hoping the crystal deposits were a matter of poor storage and will not recur.

Thanks again! The sooner she gets confident on the scooter, the sooner she can transfer to her xj550!