Originally Posted by Gnargnar
I made sure it was closed before leaving, only thing I can think is the window was open? Hadn't trailered it without the cover while on freeway before today tho
I can almost guarantee it was because the window was open. Earlier this year I was towing mine on interstate and had both the plugs out, plus a few of the carpeted panels inside had been removed. After driving a few miles, I noticed wind really pushing up on the sundeck hard and my first thought was "did removing the plug or the panels really allow that much air into the bilge so as to cause huge drafts in the engine compartment?" Anyway, after hopping out and noticing the window was open I decided to shut it and see what that would do. Problem solved. I was amazed at how much wind the little window blocked.
FYI, I tow mine without a cover all the time.