innerrage70
New member
Hello I was wondering if a holley marine 500 2 barrel fits on a 4.3 carbed mercruiser v6 its a 1988 motor thank you
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A way of determining size for a carb is CFM=cubic inches x RPM x volumetric efficiency divided by 3456. A normal stock engine will be in the neighborhood of 80% volumetric efficiency. A 262 ci v6 at 4800 rpm and 80% VE is 291 CFM. Holley does make a marine 300 cfm in a couple of versions I believe. If memory serves, the base bolt pattern doesn't match. You could compare mounting gaskets for the two different carbs for compatibility.