I understand that parts lists aren’t always accurate. But for the sake of explanation these are the holes I’m referring to in the diagram.
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I also have a 1962 Evinrude 18 HP parts motor here so I took off that manifold and found the same thing…no hole in the gasket in that area. So the only conclusion I can come to is maybe that diagram is wrong. The original gasket on 2 motors I looked at does not have that hole. And the replacement gasket has an even larger hole that doesn’t match up exactly. I might just try cleaning the original one the best I can and re-use it with a thin coat of Permatex non-hardening and see what happens.
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