Walbro wt-20 carb

[countryhog]

Got a craftsman branded poulan 2000 with a Walbro wt-20 carb. This saw ran as of 6 months ago
Been trying to rebuild the carb to get it running again. Took the carb down. Removed both Welch plugs.
Cleaned internal and external parts with spray carb cleaner. All ports were open.
Then cleaned in ultrasonic cleaner with Awesome and then again with carb cleaner. Dried the carb with compressed air. Reassembled with new carb kit. Set L and H screws to 1-1/4 turns.
No start. Would run with prime but wouldn’t pull fuel.
Pressure tested saw at 150 psi.
Decided to swap carb with a known runner. It started without a prime and ran well.
I have rebuilt these carbs before along with many other kinds with no issues. Obviously I’m missing something. anyone got any suggestions?

 

[huskihl]

Maybe your needle lever is set too low or the impulse circuit isn’t complete

 

[Stump Shot]

New inlet needle stuck in seat?
Did you pressure test carb? If not do so to 7psi/0.5bar and make sure it holds. This checks for any leakage in the internal or external passages the gasket is supposed to be sealing.
Proper gaskets/diaphragms in kit? Correct holes etc..
Keep digging in there you will find it.