Originally Posted by SteelBlueWK
So you are using the hornet spray cap as a kind of 'dust cap' for the capless fuel filler inlet? Any particular brand of spray or are they all the same cap design?
Yes, I am. It's a black cap from a large can of biodegradable wasp and hornet spray. They all seem to be of a similar, standard size. The ID of the cap is approximately 2.75 inches.
It fits snug down onto the rubber seal at the base of the filler neck. It will eventually loosen due to the taper of that seal but it can't go anywhere... the fuel door prevents that. It still effectively keeps crap out of the filler opening.