I have 2 Sea King 5 hp outboards. One of which I bought and swapped a 51 Sea Bee Complete Powerhead with carb. All three carbs have 2 threaded holes at the air horn (venturi opening) but, nothing there. I assumed that since all 3 were the same nothing belongs there. However, I have seen a few earlier carbs with a air baffle or cover mounted on ebay. I believe this is because the older models did not have side covers, at least they did not wrap around the front and cover the carb. Is my assumption correct here? If so, does anybody know of these covers restric air flow? Because I am pretty sure if I found one, it would fit.