First off even if that happened the fumes would be so diluted by the time it entered your cabin it would be harmless. We are talking about a couple horsepower tiny little engine in the open air. How much fumes do you think are going to get inside your cabin? You aren't parked inside your garage you know. You suck down more carbon monoxide every days sitting on the freeway and your worried about a tiny generator that has an exhaust port that is 1/2" in diameter 15 ft away in the open air. You have more of a chance dying from getting struck by lightning. Live a little
You and I don’t share much if any common ground in terms of opinion in regard to running a non marine generator on a Parker pilot house. I’m also not out to convince you that I’m right, so if you like the idea by all means do it.