The last Stromberg NAS3A1 I rebuilt we tested on the bench and the
steel needle would not seat completely. It dripped a little, so the
A&P/IA who signed it off whacked the needle against the seat with a
hammer. Which stopped the leak. Don't ask me how hard to hit it.
It must be done gingerly, deftly, prayerfully.


Wouldn't it be safer to lap it in with some very fine lapping compound?