Over the years I've had 214's and a 245 that never gave me trouble during the winter. I've had a GX325 and now my current GX335 that did give me trouble. When your out blowing, and it's real cold and the snow and ice crystals are swirling in the air, the engine starts missing, sputtering, loosing rpm's, real pain in the neck. So after looking into it, Deere has a anti-icing screen (AM134141) for cold weather use. You replace the fly wheel screen with the anti-icing screen. It looks the same, but the holes must be designed to make the engine run hotter. There's a red sticker on it that say's do not run engine above 40F. After using this have not had a problem. You just have to remember to swap it back out in the spring. I'm guessing the "bra" is doing the same thing.