if fuel comes out then the inlet needle is not being pushed up on the seat or not seating when fuel lifts the float… same for a toilet bowls at home. !
You do have the fat donut in place on the high speed tube ?
any chance the gasket is snagging the float stopping it from closing the inlet ?
if you flip the carb upside down can you blow air insidethe carb via the inlet nipple ? you souldn’t !!!
is the carb float level with the carb body when held upside down ?
is the float upside down ??
if you replaced the needle and seat…. did you try the old needle and seat…
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