Happy new year BBC, I got my powerhead back together and was rebuilding carbs when I noticed 4 carb main jets are .064 and two are .066. The middle carb has both .064 jets. I am going crazy trying to find where and what jets go in it. My serial number is 0a137330 1985 mariner 2.4 175 hp, carb numbers are 1374-5427/wh-30. The idle jets are .070 and vent jets are missing. When I look up a 1989 carb it shows this set up for jets. Could you please tell me if I have the correct jets for my 1985 and if so what carbs would the .066 jets go in since I mixed them up thinking they would all be the same. I originally had some scoring on #4 cylinder which might not be related. Thanks !