H16 - Hull air vents?

I have a older H16 and I'm pretty good at opening and closing the hull drain plugs.

I've never had any problem in water in either hull, BUT
Sometimes air rushes out of the starboard hull (because the air has warmed up).
I know that this can be a problem if too much air pressure builds up, AND
I believe the hulls have air vent tubes in them (PN 10140000), BUT
I can't find out where the vents are located in the hull, or how to clean them if they are plugged.

Help please!!

The vents are inside the front pylons. It's a plastic tube that runs through the foam piece that keeps the water out at the top of the pylon.

Just keep the drain plugs out when the boat's out of the water & you'll be fine. There's no critical need to keep the vents clear as long as you do that.