I am having this problem with my ariens 11.5hp 28" snowblower. Its 1year old and has maybe 2 hrs on it. When i am snowblowing i could use if for a hour with no trouble at all, then all of the sudden it looses just about all power. If i try to continue pushing it into the snow the enging will come close to dying. If i pull it back and wait about a minute its back to normal with no signs of what just happened. I have checked oil, gas supply line, auger belt for tighness, drive belt, and all controls and i am not able to find anything. Of course when i bring it in they need to see it happen before their eyes but it doesn't happen.