Ha Chaz;
I did not like those vents either. I didn’t see they served any purpose on a outboard either so I filled them in. Check to see if you have small vent holes under the cap by the transom area in the inside. I have one on port and starboard. I also installed a vent on top of my gas tank under the CC I use it for both for a access plate and vent. For me it gives the boat a more sleek appearance.
FellowShip
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My motto: Just for the Grins