B&G Gold series 6.75 190cc mower engine model 126M02 6863-F1-1205 0258 wont start. Good spark, good compression. Fuel leaks from bowl when bolt loosened. I've cleaned carb twice pushing wire through ports including metering jet in bolt at bottom of bowl, spray with cleaner then blow out with compressed air. After that it sat for three days then fired up and ran strong for 20 seconds and died. Back to no start. Blowing through fuel line with bowl upside down get restricted flow. Bowl right side up get no flow. Needle/seat good. What am I missing?