HF leakdown test is a Piece of Big Steenkeeng SHTUFF but here is

I just ordered two of these .040 carb jets. I realize fully they are not "FAA spec" but they are more accurate than a twist drill. If I cannot tap threads for them, I'll ream out the housing and JB one in place. "One for a spare" LOL

NEW OLD STOCK EVINRUDE JOHNSON BRP OMC 327745 .040 DIA. ORIFICE IDLE JET 0327745 | eBay

Just tore it apart. I didn't fuss with it too much but the "orifice" which is part of the main housing, is around .1--.125" Again, this thing does not operate at the recommended 80-100 psi, but rather somewhere around 15