I was thinking the same thing, but looking down further at the specs, it says Engine Type is 2 cycle. I don't believe that it is though, and I'm guessing the specs are wrong for the engine they have listed as the specs also recommend 10w30 oil. I'm on the phone with Home Depot trying t get some real answers. Wish me luck with that.Unfortunately I can not tell from the picture, because the gas tank covers the head, whether it is a flathead. But the description does say side valve, so that means its not ohv. If you get it and it is ohv, just take it back for a refund, but I'm pretty sure thats a flathead.