Sorry you stuck your engine, but.........SHEESH..How many times do we have to say it......
THERE IS NO SUCH THING AS A SINGLE, CORRECT, NEEDLE SETTING FOR ANY GIVEN CARBURETOR....
Carburetors have adjustable needles for a purpose..
There are too many variables--prop size, altitude, fuel mix, etc.How many companies test run the engines before shipment ??
I DEFY ANY MANUFACTURER TO TELL ME THAT SETTING THEY SHIP THE ENGINE WITH WILL BE CORRECT 100% OF THE TIME..(Unless it's set way rich)....
Walbro carbs come from the factory already set at about 1 1/2 out on both needles..It WILL work there, but sometimes with the above result, stuck engine from being too lean...
If you're lucky TKG is correct, set it way rich and run it far a while that way...