A question on carburetor

MrMarty51

Seaman
Joined
Aug 4, 2020
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53
The carburator off the 70 horse Force engine has a very small hole just ahead of the fuel inlet elbow. I have never seen a carb that would draw in air from anywhere except for through the air horn, or throat of the carb.
If I can get a pic to load, I drew a circle around that hole. All I could figure out was how to draw the circle in black so I hope it is visible.
Is anyone familiar with this and what might be the purpose of that hole ?
 

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