A fuel tank assembly includes a fuel tank including a fuel inlet. A fuel cap is threadably engageable with the fuel inlet. The fuel cap has a grip provided for manipulation by a user. A vent path extends between a vent channel and the interior of the fuel tank. In a first configuration, the fuel cap is fully threaded to the fuel inlet to a fully closed position. The assembly is operable to transition to a second configuration in which the vent path is unobstructed and the fuel cap is fully threaded to the fuel inlet to the fully closed position. To enable unthreading of the fuel cap from the fuel inlet, the fuel tank assembly is operable to transition from the first configuration to the second configuration in response to a movement that does not alter the threaded engagement with the fuel inlet.