side holes allow air to emulsifty the fuel .
a bigger engine probably needs more emulsified fuels hence the extra hole
yet parts diagrams are not clear on the actual amount of holes.
the pictures in the J service manual seem to show 1 hole for bigger engines….. maybe since their vacum pull is stronger 1 hole is ok while smaller hp rated engines need more side holes…. since they have less “pull vacum” on the carb.
try one hole …see what happens
theory anyway 🙂
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