Carb bowl leak
I have a 912ULS with 1040 hours and 16-1/2 years on it. In July I sent the carbs to Lockwood for a 5 year rubber replacement and overhaul. All was good until this morning. While doing my preflight walk around the port side carb started overflowing fuel through the vent line. I closed the fuel valves and finished the preflight. That was not a really unusual incident. After a 1.1 hour flight I shut down the engine and got out of the airplane. A large pool of gasoline, about 18" wide, was forming under the port side of the engine. I shut both fuel valves. After putting the airplane properly in the hangar I noticed the carb was still dripping. After checking to make sure both valves were actually closed I removed the cowling and looked closely. The fuel was coming from the bottom of the carb bowl. Not the gasket. The upper part of the bowl was dry. The bottom third of the bowl was wet. Upon removing the bowl I found that the pin that holds the left float in place had come loose. That pin also plugs a hole in the bottom of the bowl.
Has anyone ever heard of this happening?