2001 Evinrude 70hp 4 stroke has vacuum nipple open?

Question:
Just bought this motor with the boat and notice this nipple with opening on intake maniford. Looked everywhere for vacuum hose could not find one, is it possiable this is a some kind and test port from factory and maybe vacuum plug came off?

Answers:

Can you get an historic licence for a dump truck that is 25 years old?

it's a vent to atmosphere. leave it open.

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