I also have the same problem with the 2014 Simplicity Regent EX with the 22 hp Briggs. It takes 10 to 15 minutes to put 2.5 gallons of gas in the tank. There is a baffle just below the throat and it restricts the flow of gas into the tank. I had assumed it was a federal law that made Simplicity build the tank this way but then I saw a new Toro mower that my neighbor purchased a couple of weeks ago. It did not have this baffle.
There is no way, with the way the fill throat is restricted that you can fill this tank quickly.
Anyone have any ideas. Any Simplicity dealers out there that have a resolution. My dealer just says you have to fill it slowly.
Thanks for any help you can give.