Model 281223BVE, when I have the brake pressed all the way down, it runs and idles fine,then when I start to release the brake,it runs as if it has the choke on,it pops and hardly will run. This happened suddenly,worked one day and not the next.It's like it has a switch,or sensor on the brake system.

Is this your Snapper? 281223BVE SNAPPER REAR ENGINE RIDING MOWER Manual | SearsPartsDirect If so try to get the manual from Sears. I think you have a belt or pulley not freely spinning