merc carb question

[rock]

1989 175 Merc verticle reed motor. Carbs are WH with no number. Top and bottom carbs jetted with a 64 and a 66. Center carb has both 64. I need to know which cylinders get the 66s. I have looked thru my manuals and cannot find either a WH listing or any carb with 66s and 64s. My chart lists wh1 thru wh29. the 23, 27, and 29 all have 64s in all six holes and nowhere on the chart do I see even one 66. I realize someone along the way may have changed them but on this rig I doubt anybody did any experimenting but I guess you never know. Any and all help appreciated. Thanks

Rock

[transomstand]

#2 and 5 always get the bigger jets. I think you have WH-34's there, should have no vent jets, and .070 idle jets.

[rock]

Thanks Pete