The prop I am using did not hit the ground I think, but I could check anyways. I took it for a flight last night and got some improvement, but I still had 3 deadstick landings. I had about 5 successful power on landings, 3 deadstick and it always happened on final approach with the engine idling and the motor not sustaining the idle. It did the "sounded great on the ground" I even ran it at idle for a few minuets to see if it would die. Mixture seemed correct according to the tests. It seems to vibrate most at idle but I mean, vibrations will always be there won't they? I could check the prop but if its not that, than I have no clue what it could be.