Is this normal for a new TORO Recycler Mower??

Just purchased a new TORO Recycler 20340 Mower with the B&S 163cc engine. I have only used it twice, but each time after the engine has run about 4-5 minutes, the engine will briefly sputter about a half second or so like it is running out of gas, then run normally once again for about the same time period and repeat the same scenario. It has brand new fresh gas that I put into it so I seriously doubt it is a bad gas issue. Otherwise the engine runs just fine, and it uses a lot less gas than...

Is this normal for a new TORO Recycler Mower??