Fuel system help Zenith Aircraft Builders and Flyers
The fuel caps I received from Zenith are vented so you might not need a separate vent line from the tank if you received the same fuel caps If you check your caps you will find 2 or 3 small vent holes on the fuel side of the rubber seal and 4 small vent holes just inside the outer edges of the underside of the fuel cap if you did receive