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73b 65 HP Mystery part in carb

jim18611865

Regular Contributor
What is the 2nd low speed orif

What is the 2nd low speed orifice plug doing in the path of the high speed. I am talking about the orifice that is in the upper assy where the float chamber/bowl and the assy go together. It seems that this orifice would make the high speed orifice plug do nothing. There is no mention of it in the OMC manual either.
 
"thats just the way they made&

"thats just the way they made'em...i believe,they did away w/that orifice in later yrs.iit does not affect hs,but contributes to mid range throttle response."
 
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