I ordered the W1 rebuild kit. I was idling it today trying to time the engine and while it was idling it died and fuel started weeping out of the carb. I'm guessing that's float related?
I'd be more inclined to blame the needle valve not seating properly allowing fuel to overtop the fuel bowl.
Check the fuel pressure, though. should be between 2-4 psi. My rebuilt mechanical pump operates at 2.5 psi.