#3 is the pilot jet.
Remove the pilot jet and the pilot screw.
Be careful when taken out the pilot screw, to not lose the spring and washer.
Blow in alittle carb cleaner into both, let set 3 minutes.
With a rubber tipped air nozzle, blow out both passages.(Need compressor)
reinstall and set pilot screw to 3 1/2 turns out, if stock.